L31 vs lt1. 55 valves more similar to the Fastburn but .
L31 vs lt1 Thinking of throwing 1. The biggest friction and wear reduction is in the pivot balls. com: User Name: Remember Me? Password The iron heads are the same as Vortec L31 w/o reverse flow. Is there anything special about an L31 front balancer? Apr 6, 2019 #6 S. Intake / Exhaust Velocities A P01 PCM from a 2001 or 2002 Express / Savana with the L31 5. . Has headers and muffler deletes. The holes in the It is an LT1, Vortec heads are not applicable to the GEN II LT1 because the LT1 has a different cooling system configuration. 495 / . The Chevrolet small-block engine refers to one of the several gasoline-powered vehicle engines manufactured by General Motors. Also that it has press in rocker arm studs. 5", farmed out EFI 24x, 2001 LS1 pcm, VooDoo 211/219*, w/1. The 1994-96 iron head 350 LT1 was an optional engine. GM 12551705 Melling; Melling # : 2022 Chevy Camaro LT1 vs. 050 . Base engine friction seems like it's going to be affected by stroke and bore more than anything else. 0L engine has a calibration setup for a 4x CKP. 88 ounces #10241743 LT1 Valve, Exhaust . The 2002 Express Van L31 Injectors are Sequential Fire. 6ers instead of . Emissions Note: 92-97 LT 1 vs L31 vortec Engine & Drivetrain. it was cheap, well technically free once I parted out a wrecked '97 Tahoe. The radiator plays a crucial role in the cooling process. is holding up progress I've looked & googled ectra nojoy. The 1991 L98 should run 0-60's mid to high 5-second range (5. I have installed Ford Blue Top 24lb fuel The L31/B-body cams, according to my notes 191/196 . Stock LT1 makes over 350 hp tested with the GMPP dual plane. C4 Tech/Performance - L98 Intake vs LT1 - I was wondering if it is possible to swap the L98 intake onto the LT1 or LT4, and what would the pros and cons of doing that be. The 1998–2002 Camaro and The L31 Vortec 350 cam is also used in the Vortec 305, the 94-96 iron headed LT1 350 and 94-96 4. will a flywheel of a '87 305 (LB9) work with a '97 350 (L31 vortec)? using the same t5 for both. The exeption is that the LT1 has reverse water Read an overview of Chevy's LT1 engine and LT4 engines, which were part of GM's generation II engine family beginning in 1992. 7 L31 or 97 LT1 (Jump to Latest 3K views 4 replies 2 participants last post by TowVan Dec 1, 2017. Here are five great things about the LT1 engine: Power and Performance: The LT1 engine was a high-performance powerhouse. 3L V-6 shares many components with them, but has a larger, 3. 55 valves more similar to the Fastburn but 383 LT1 - LE Trickflows - LE Ported Intake - Jones Cam Designs Solid Roller Strange s60 4. It also got better fuel economy, making it a worthy successor to the long-lived small block Chevy. This Gen II LT1, named in tribute to the original LT-1, was a significant improvement over its older brother. The heads are equipped with 1. We are currently experimenting with installing the newer silver 411 PCM's in the 1996-1999 Vortec 350 trucks, and using a 2001-2002 L31 Vortec 350 Express Van tune to run the engine. Register or Log In To remove these advertisements. The 1996-2002 Vortec 350 rpo L31 was rated at 255 sae net hp/330 lb/ft torque. Both the LT1 and 4 share the combustion chamber of the Fastburn rather than the Vortec. Click to expand Don't forget that a higher compression will more than compensate for that, not to mention lighter weight. He put a 11:1 LT1 crate short block in it. Also the LT1 head/manifold interface is dry, there are no water passages. 1970 LT1=very good motor! My buddy had a '66 Chevy II 4-speed. The description say "marine cam,but,this is the Ramjet cam. GM changed a significant amount of the architecture for Gen 5, correcting and improving some issues found in the Gen III/IV design, and creating new challenges as well. 8) where the 1994 LT1 should run strong mid 5-second range and even dip to a lower 5-second times (5. 7 DOES have a roller cam from the factory and came in 96-98 CK trucks, thru '00 in SUV Building the L31. g. But my car will never have the WOW factor or high value of a ZR-1. that´s completely outdated. 1. So if the L31 to LT1 swap was seen as a cheap solution, that's starting to fly out the window. This list will ignore obvious engine/cam specifics that should be set with a WB and focus on those things Hello. When I converted a Vortec L31 to 24X, I started with a Camaro LS1 Drive by Cable base tune. L05/L03. 04-30-2024 #4. This should be fairly easy to identify. hotrodg726. LS1 is an aluminum block vs the 5. I bet the pn is the same too <g>, because it is the same cam. 5, the same rocker arms, roller lifters, etc etc etc 'The Lt1 will bolt up to L98 motor mounts, but you'll have extra bolt holes in the block (if memory serves)-won't cause any problems though. 5 rockers you shouldn't have to enlarge the pushrod holes. lift would be . Reply. These include: The first or second generation of non-LS Chevrolet small-block engines; The third, fourth, or fifth generation of LS-based GM engines; The Chevrolet Gemini small-block engine; An early model of the Chevrolet small-block engine LT1 is not a good way to determine training zones or substrate (fat vs carbohydrates) utilisation. TowVan I just need to figure out if using the B-body LT1 camshaft (very close to L31 Vortec camshaft specs) is what will best compliment this set-up or if using my factory LT1 camshaft would be the better choice, and then whether or not to modify the Vortec heads to use 1. 6. Optional B/D-car LT1 Cooling Systems: There are two optional cooling system upgrades for LT1 B/D-cars, called V03 (Extra Capacity Cooling), and V08 (Heavy Duty Cooling). HUB AND BALANCER. LT1 is an indicator for performance changes, but it makes more sense to focus on the actual end goal (e. So if rated in gross hp, a Vortec The LT1 has more power throughout the rev range and runs away from the L98 entirely somewhere around 3-3. That engine was the last of the gen I line production at GM. 54 posts · Joined 2006 This camshaft is a great upgrade for 1996-2000 Chevy/GMC trucks equipped with the L31 Vortec 350 Engine. 1971 the hp of the 454 was stated sat 425 while the base 350ci engine started at 270 stated hp and a max h. GM fixed the reason I am not a fan of those L31/LT1 PCMs with the P01s and P59s. EFI-connection manufacturers a kit to allow this. Gearhead346 Discussion starter. 1970 saw the introduction of the 454 with max hp at 390 thanks to pollution restriction increases. L31 is the way I would go. In other words, what makes the LT1 get The Vortec 5700 L31 (Vin code 8th digit "R") is a V8 truck engine. I'm trying to figure out if its worth buying and swapping that engine into my 93 fleetwood and putting the 350 tbi in the caprice. Displacement is 5. LT1 blocks are thin, crapy castings. Your email address will not be published. The cylinder heads feature combustion chambers and intake ports very similar to those of the Anyways here's my opinion of of the L98 vs LT1. What motor is easier to take care of LT1, L05/L03? 2. I have looked and looked and cannot find solid information on the cc of cast iron lt1 heads. 5 rockers pushes . I have currently a ls7 lifter set in the motor and the some lifters are giving me problems. 18982 posts · Joined 2010 Add to quote; Only show this user The L31 long block came stock on 1996 1 ton vans, it came with the Vortec/TBI intake manifold that GM designed for this application which was later used in the GMPP/CPP catalogues. So which is "better"? They're both fun in their own way, and they both have plenty of tq and throttle response (instant, in both cases). the hp is 255 for cam LLoyd is likely talking about the pushrods clearing the holes in the heads. The quarter mile for the '91 L98 would be a very high Not a whole lot of factory TBI 350's had PM Rods, Later Gen II LT1's & Gen I L31 did. 06 x 3. 1SS Feature Comparison; RPO Code LT1 1SS; MSRP (including DFC) $35,195: $38,695: Brembo 4-piston front, 4-wheel disc brakes: J55 Even though '97 was the last year of the LT1's, it was not the last year of the post-1986 Gen I/II small blocks w/ 1-piece RMS. The trade off between shrouded vs unshrouded valves not worth the The LT1 powerplant uses the late model 350 oil pump with the 3/4″ pickup tube. Guys - I need some help. have only 1cam and 2valve/cyl. Road and Track said that BMW blamed it on US drivers taking it too easy on the engines, so the rings never broke in and sealed. Is the LS1 or LS3 better? Chevy LS1 vs LS3 performance, specs, reliability, upgrades, & more. Jump to Latest 11K views 29 replies 0 participants last post by Roadmaster May 13, 2004. 7L V8 truck engine. here is what I got. L31 pistons are the same. 2002 Express Van '0411 L31 are the spark tables. 30 - 4L60e - SS4000 - 3400 lb - 28" MT Radial An L31 Vortec engine (i. With features such as its revolutionary ‘reverse cooling’ mechanism, which kept the heads cooler to allow for greater power, a higher compression ratio, and significantly improved spark. More cam will want more initial ignition timing, so increase the initial and limit the mechanical to get to your 34. 7 L) truck engine was manufactured from 1996 through 2002 (e. THIS ! i always found the coyote more agile, better flexibility compared to the 2012 SS and the C7 engine. Save Share Reply Quote Like. So while the L98 may make a little more low end torque than the LT1, the LT1 has enough grunt that it will outpace the L98 from the line immediately. 00x1. Then lastly, converting my troublesome LT1 optispark ignition system over I do not believe you can run the 24x reluctor wheel from an LS motor on the lt1, you can however run a front mount 24x reluctor. 3mm) Solid stem Weight:110 grams, 3. I picked up a harness and 0411 off an 02 express van that I'm trying to use for the swap going into my 92 z28. Advantages: No more 5800 rpm rev limit like The FE1 is the mush ride suspension, the FE2 is the Firm Ride and Handling. 7L and 5. I used a timing set for a factory chevy roller cam and just pushed the dowel in farther and used a cam plate, my block was already drilled for a cam plate. C4 General Discussion - Lt1 Vs. 459 and . General Motors' small-block engines have powered its vehicles for decades. Can the Iron heads produce the same power as the Aluminum? I am asking because there is a 5. ITs easier/cheaper to convert to an LT1 than to find a mint/everything works car . is an lt1 with 156,000 miles worth the 2 grand? that would be the sole purpose of me picking up Starting in 1996 on several GM Trucks and Vans, the L31 Vortec heads came on the scene. check out the lt1/lt4 hot cam The LT1 was the detuned, slightly changed Corvette engine. One of the challenges I see with the 96 LT1 vs. Save A good example if I'm buying a flexplate for my LT1 (which is basically a 1-piece 350), I have to buy one for an internally balanced engine, even though the flexplate Has anyone done any power or fuel economy evaluation on running higher octane vs lower? As the LT1 was designed to run on 87, was it factory lowered timing to keep it from pinging? Does it bring timing up when higher octane is introduced? LT1/L31/LQ9/LS6 PCM Tunes starting at $200! L31 Cadillac Escalade Tunes $225 including PCM! The 96 LT1 got a crank sensor (1x or 4x, very simple, not needed on a 94/95 engine) and diff knock sensors, easily swapped back to 94/95. Come join the discussion about performance, specs, builds, conversions, swaps, modifications, troubleshooting, maintenance, and more! Show Less . IIRC,you need to verify the length of the locator pin on the front of the cam. LT1/L31/LQ9/LS6 PCM Tunes starting at $200! The C4 Corvette LT1 engine, introduced in 1992, was a powerful and innovative engine that left a lasting impact on the automotive world. 35 ounces #12550909 It don't take many brain cells to realize that spring maybe adequate for the light LT4 type valves but not the heavier solid stem vlvs on an LT1 - at high RPM. 2L variants — L86, L87, LT1 — are essentially the same internally, down to forged steel LT1/L31/LQ9/LS6 PCM Tunes starting at $200! L31 Cadillac Escalade Tunes $225 including PCM! Why did you choose LT1 edit vs say TunerCat or ??. 525 with 1. 500 lift. Of course you can always scrap the injection and computer controlled ignition and go with a carb and HEI, that would simplify the systems issues a lot. 92-inch bore vs. Hey guys, I like several others am trying to tune my '96 LT1 Camaro with a 24X EFI connection. com who have WILD combinations and run the standard LT1 set without any issues. increasing the performance of your aerobic energy system) instead. LS1 24x Ignition”on pages 10–11. LT1 roller cam Three years ago I build a one piece rear seal roller ready 350 and I used a LT1 cam. With a rated output of 300 HP and 300 ft. Hello everyone! as the thread states, I am in the middle of a 12200411 PCM conversion on my '96 Trans Am WS6 LT1, I have got the car to run, albeit very roughly, but running none the less. ersus the L83/L84’s 3. 418/. As mentioned above, both the LS and LT engines use the same general foundation. LT1 - Comparing a 1992 LT1 vs. Cam application index will usually say " '87-'99, except LS1". is a 383. That's a significant gain IMO to switch to 1. IMO there is more out there in accesories for the LT1 is 201/208 degrees at . 459 lift with 1. Unknown member Discussion starter. the L31 cam has identical specs (lift, duration, LSA) as the Bcar L99/LT1 cam. 6rr and lloyd elliott 226/230 . LT1/L31/LQ9/LS6 PCM Tunes starting at $200! L31 Cadillac Escalade Tunes $225 including PCM! N0DIH I dunno about LT1 vs LS1, but you should clear out your PM box. I believe even the hp rating is the same at 210. A cam-in-block pushrod V8 design that ties its roots to the same basic principals as the ever-popular Gen-1 Chevy the GM hot cam was and is designed to give the MAX performance that can be added to a STOCK LT1 or roller lifter & cam upgraded L98 engine without causing ANY clearance or performance issues, yes you can very slightly exceed the specs but youll usually find it requires other matching mods to function correctly. LT1 vs. Not just a modification of existing heads, but complete redesign using the 1996 Caprice/Impala SS LT1 cast-iron head castings as a base. Take a 411 PCM from a 2001-2002 Chevrolet Express Van that was equipped with the 411 silverbodied PCM, swap to the dual 80 pin connectors, and flash the PCM with an 01-02 Express Van cal. This cam is great for additional bottom end torque. LT1: 8 Ways the C8 Corvette’s LT2 Engine Bests the C7’s LT1. auto. Do a search for #14097395 camshaft. L46 Engine. how much power did the legendary original (high-compression) 1970 lt-1 really make? ra Use the LT1 computer and adapt the LT1 wiring. Accessory brackets are different. There were other improvements as well. But you're able to drive and enjoy your LT1 and not have to worry about accident repair, long discontinued parts, etc. Even the 395 Ramjet 350/HT383/Marine 350 crate engine cam is a nice addition over the lame stock Vortec 305 L30/350 L31 191º/196º 0. I've seen it time and time again. This is an older thread, you may not receive a response, and could be reviving an old thread. I am betting any 90-92 Chevy powered Cadillac can also use the PG260M. Once the motor is running, you can try rocking the timing back and forth a couple of degrees, but the L31 chambers are very efficient and should The LT1 heads and the improved LT4 heads share features with the L31 and the Bowtie Fastburn. The L30 and L31 are very similar, with the only major difference being the bore and possibly a slightly smaller cam on the For a fact the Hotcam with pocket ported LT1 heads is enough to pull on a ZR-1. the L31 Vortec heads came on the scene. 6 RRs. The nice thing about going with the OE vortec pistons is that they have thinner rings than the ZZ4 / LT1 piston. this cam was also used in the 1994-96 L99 4. 7 L It seems like the L98 and LT1 are mostly alike except for the difference in HP and compression ratio and the LT1 has a optispark while L98 doesn't. In the end, it may not make a ton of extra power like a cam swap would, but for a bolt, it full dyno results on each. 3 V8(vee 8) bably LT1 GEN 2 engines that was the standard engine in the Caprice cars. The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain: 92-97 LT 1 vs L31 vortec Web 67-72chevytrucks. L31 will run without a cam sensor connected. 412/. Three of the naturally aspirated 6. The L31 roller cam is quite similar in timing to the old 300 horse cam used in the high compression 327 and the lower compression 350 both with 4bbl carb back in the late 60’s early 70’s. Use the optispark as a distrubutor for spark and the later LT1 crank sensor, reluctor, coil and ignition module is the same as a L31. 94" (49. 2. We're taking a look at two current models, the LT1 and LT4, to find the differences. 73 gears with a blown headgasket at 204k miles. 7" rr . ) Several variations of the LS1 were released in the 1998 Camaro and Firebird and 1999 light trucks and SUVs. 1mm) Solid stem Weight:95 grams, 3. 490 with 1. New posts Search forums. My present project is a 1976 Corvette with an L31 350ci Chevy in it backed by a 3spd automatic (I want to say a TH-300, but I won't say that since I don't know for sure, I can't remember except that in 3rd the car's turning about 2600rpm at 65-70mph). Separating the two made it easier to install the Optispark distributor on the assembly line and out in the field. 42 gears, it is still slow to warm. But you need to check. 94x1. I keep a couple Gen II LT1's around for the rotating assemblies to repair Gen I Vortec L31's. I then transmogrified the table from the LT1's MAP vs RPM to the 0411's g/cyl vs RPM. Car is 95 Corvette with LT1 and 4l60e. Its just something i read off the internet. 13k miles all stock. Before going off the deep end with a cam choice remember the air flow limits on a stock vortec head and the flow stalls around . The LT1 intake and cam help it produce more power. I assume since the lower compression in the impala ss it may be around 62-64 cc. I would like to put together a test mule to learn The L31 Vortec shortblock does have a proven history of bearing failures, most of which can be attributed to the intake gasket failure and the resulting oil & water mix. For the P01 PCM to correctly control your 1999 Vortec based engine platform (4x CKP and a 1x CMP in the distributor), it must be programmed as a 2001 or 2002 Express / Savana with either an L30 or L31 calibration. Aside from the ignition,wiring,pumps, and other accesories. the world's fastest NA LT1. Note that an LT1 or LT-1 intakes will not fit L31 heads. :smash: Vortec L29 L30 L31 L35 ECMs do not Require CAN Termination The Vortec L29 L30 L31 L35 ECM does not communicate with CAN bus, so it can be programmed on the benchtop with a direct connection to the BenchForce™ PowerBlock LT1 B/D-cars also include an engine oil to water cooler (KC4) mounted in the LH radiator tank. The marine L31 is marine net rated a 292 hp with the marine intake, freer flowing marine exhaust, and the 395' cam. 62 The smaller-displacement LV3 4. Only difference really would be the compression ratio. 50 valves more similar to the L31. 0L engines are also known as Vortec 5700 (RPO L31) and Vortec 5000 (RPO L30), respectively. The ZZ4 cam is a very worthwhile upgrade. 3L V8 L99 engine used in the D/B full size cars. For the 383, I think the increased power comes from not only the longer stroke, but the fact that a 383 breathes deeper. Add to quote #1 · Apr 29, 2004. The L31 is rated at 255hp & 330# torque. There are "squarish" holes in the deck, one near each end, that need plugs welded in. The optispark on the LT1 maybe even makes it more reliable. Meaning it has the same spring RATE as the Impala SS, only taller, and the Impala SS/9C1 HD anti sway bars. The Ramjets are also fairly short, probably in between the Marine and LT1 runner length. The LT1 & LT4 cams are commonly swapped into Vortec engines. Aren't L31 vortec heads the closest to LT1 heads? And I'm pretty sure someone has mated TPI to L31 heads. Besides that, the chambers and ports of the Vortec L31 were first used on the iron headed LT1 used on B bodies from 1994 to 96. The LT1 featured a cast-iron block that was topped with aluminum heads and was capable of producing robust, performance figures. (Use L31 van tables?) [MikeOD suggestion below] {Van tables not really all that good either. 495 if 1. I use a -10 AN fitting in the front of each head to the radiator, and a push button bleeder in the back of each head to get the air out at fill up. 423 111*not even gonna tell you which is which cause it don't matter. Thread starter gm muscle; Start date Nov 25, 2013; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. A block is a block whether its the L98 or LT1 IMO. trey; Start date Jun 29, 2018; even heard a few fellow Vette guys say for a daily driver they preferred their torquey fun L98 TPI's over the later LT1's which had more hp in the way they felt on the street. He used the Phase 1 Bowtie heads and the second design (offroad) LT1 cam from GM with the GM recommended valve train parts. 5 arm LSA 117 this is hotter than the L31 cam but the wide LSA keeps idle vacuum high making this cam very computer friendly with an idle that is milder sounding than the cam timing would make you think. Performance models such as the WX3 (Impala SS) and 9C1 (Police) cars Hi im going to cam my 1996 c1500 pickup thats got a L31 in it i was wondering if anyone knew if the current valvetrain upgrades im looking at would work and Forums. . Ls1 - Hey guys I have a 1996 LT1 Coupe 300hp. From what I've seen of the tunes posted, I think there are some things missing. Manufacturer Photographer Frank Markus Photographer Nov 06, 2019. 5 Besides elongating the pushrod holes, using different valve springs and Gen II introduces the 1990’s LT1 and LT4 engines ( note the original LT-1 of the late 1960’s early 1970’s has a dash between the letters and the number of the designation where the 1990’s version does not. This car was raced sporadically with a 454 that was never particularly reliable, so I'm looking to use a 350 instead, and make it a vintage-legal SCCA B-Production car. The LT1, however, has way more hp, 1000 more useful RPM and as a result, will handily out The Vortec 5700 L31 (VIN code "R") is a 5. When the LS1 powered cars hit the streets, they were fearsome monsters right off the showroom floor, immediately feeding some serious humble pie to the L98 and LT1 cars that preceded I would personally like to see 2 sets of heads, iron and alum, same port design (say a 1996 LT1 alum and iron) and see if it shows the exact same hp one vs the other. '83 Choo Choo SS El Camino - LT1 350/4L60e, Owned for 25 Years, completed 2nd restomod in 2018. Any advantages for it vs the others? I don't like how it locks you to a PCM. 1; 2; First Prev 2 Real cool build, whats different about the lt1 pistons vs l31? Dec 30, 2022 #10 PlayingWithTBI 2022 Truck of the Year. lt1 355 ported heads and intake comp pro mag 1. I would like to start of list of things that need to be changed from an '01-'02 F-body tune. L59 denoted a flexible fuel version, while the LM7 was the standard The Gen V Chevrolet engines were introduced alongside the release of the C7 Corvette, with the LT1 being the first to debut. 21k miles also all stock. G. the 1992 LT1 produced 20% more horsepower and a much broader torque curve. I and a few friends have come up with a conversion for the Vortec 350/305 1996-1999 GMC/Chev truck owners. 7 engine in place of the persnickety LT1 Gen II engine that preceded it. 6 ratio rockers over the LT4 hot cam on my build. 010'', hand ported 374s & intake (David Vizard tech), 1. Required fields are Which GM cam to perfect the L31? Thread starter sharpe. In matter of fact, the ports from the iron LT1 heads were stolen and used in the 1996-02 L31 Vortec 350 heads. 1995 TBI truck block, L31 pistons/rods, B-body roller cam (got to have that fuel pump lobe), 55cc '113 aluminum L98 heads, Bowtie ZZ4 intake, Qjet. The cylinder heads feature combustion chambers and intake ports very similar to those of the LT1 V8, but lacking the LT1's LT1 Cam in L31 (Vortec 350) Jump to Latest 33K views 32 replies 7 participants last post by jokerZ71 Mar 3, 2016. Unless you have a LT1 sitting under your bed why not do the LT1 manifold conversion on to a L98 block and port the 113 heads. Therefore a 383 with a healthy cam and heads, will walk all over a high revving 350. The flexplate has the same size counterweight in the same spot. LS1 debate are as follows (I will leave the determination of the validity of these points up to you): (1) LT1s have a reputation for being costly to maintain because of the optispark ignition system (and the placement of the water pump). non LS based) is not a gen II. Orpedcrow said: whats different about the lt1 pistons vs l31? C4 Tech/Performance - Difference between an LT1 & L98? - L98- 230 HP 330 Torque ft. the ICL is at 106 deg in the L31 vs 111 deg in the LT1. ): 4. 7 L LT1- 300 HP 330 Torque ft. If you buy a flat-tappet equipped engine, you will have to find a spider The LT4 came with 10:8:1 compression as to 10:5:1 for the LT1, this was acvheived by having only 2 valve relives on the pistons as to 4 on the LT1. As Busted knuckles said the only difference I see in the GM parts listing is that it specifies 4-bolt main for the 2500-3500 trucks part#12530283. With the Hotcam package the LT4 was a 425 hp crate engine if you want to compare apples to apples. Reply With Quote. Caprice (not LT1). I have been planning a swap or engine build for a while, but I need some info from some more LT2 vs. Most NHRA Super Stock LT1 cars I know of use a GM BowTie block. 73:1, ported My plan is the ramjet intake on top of my L31 with an lt4 hotcam. 576 lift cam and patriot springs 155lbs seat and 410open and will only be spinning around 6500rpm approx maybe higher but doubt it. 7L LT1 Engine Problems. Effective Compression Ratio vs. Not hard to find, it will just be a matter of how much you want to pay. 447/. 2-5. The car had 38k miles, and was wrecked. The L31 Vortec Marine runners are 8" long, for comparisons sake, the LT1 has 4", the LS1 has 14", the TPI has 21" runners. Ill pick the TBI. The LT1 has a 175cc intake port and 1. bought a L31-r # 12530283 Engine , got a feeling its a better choice than the 350 deluxe. Click to expand Should work. BMW (and basically everyone else with DI) has had similar issues. Supporting Member. I found a 96 caprice with an LT1 with 156,000 miles for about $2000. Thanks, Greg C4 ZR-1 Discussion - ZR1 Vs. Will also require custom chip but cheaper option than converting to LT1 ECM. I'm rebuilding a '73 convertible Vintage road-racer. It's getting harder & harder to find good used L31's! Click to expand no im not certain its pm. The L31 cam has the same lobes and lobe spacing as the stock LT1 B-cam, but is ground with 5 degrees advance, ie. On stock Iron heads there is not a lot of room. The LT-1 of the 1970's uses a The LT1's and at least the 93 L05's (likely more) have a 153 tooth flywheel, with non offset mounting bolts. If you click them and make a purchase, we may earn a small commission. The Alex spring kit and the LT$ hot cam make a nice uprate for the L31. And while the LT1 intake ports are raised compared to a traditional head, they are only slightly so. A year ago,these were going for $99. It is a stroked (by 9 mm) version of the Vortec 4800 and replaced the 5700 L31. The debates should, and can be fun. My buddy has a 1998 LS1 Coupe 345hp. What you see below is the basic shape of the stock 99 astro - 98 Vortec 5. Specifically, I am looking at their L31 type engines originally found in '96-00 Chevy full size trucks. Those junk pivot ball gimmick roller tip garbage are not LT1/L31/LQ9/LS6 PCM Tunes starting at $200! L31 Cadillac Escalade Tunes $225 including PCM! Programmer@PCMCalibrators N0DIH I dunno about LT1 vs LS1, but you should clear out your PM box. The LT1 has a distinct advantage of more material there for porting though and IMO can lead to a more optimized head The crank for the LT1 looks just like the one in the late 350 and has the same casting number 14088526, but it’s balanced for the lightweight pistons that were installed in the LT1. You existing computer will support the Vortec ignition as well but some reprogramming will be involved. I can't believe the camshaft by itself adds 70# of torque. Just be sure to drill out the pushrod holes to 1/2". Some people say the LT1 cam is not a great truck cam but I disagree. a cam, heads and all the bolt ons and youll be fine. The Crane 227 cam or the GM 845 cam will work with stock valves (need better springs) but in most cases you will need to use 1. 7 LT1 out of a Buick that can be had inexpensively. 7L or L30 5. The LT1 also proved to be revolutionary in more ways than one. Static Compression Ratio. If installed in one of these trucks, a custom computer re-program is needed. 64cc combustion chamber. Without having ever done much vortec research, from my limited understanding the Vortec uses a head design based on the success of the LT1. How do you think my 96' would do against his 98' in a stoplight race? Also isnt the 96' a better quality vette than a 98'? L31 with LT1 bottom end. p. I am really interested in everyones opinions and thoughts on cost VS horsepower VS ease of installation. * Enter the Patterned from the design of the LT1 cylinder heads from the 1992-96 Corvette, the Vortec iron heads were first used on the fuel injected 1996 pickup truck RP0 Code L31. LS1 engine, designed of aluminum, features more advanced technology, including an electronic throttle control system, sequential fuel injection, and a more sophisticated engine control module (ECM), and is Mainly it was on the advice and experience of Impala/Caprice owners on the impalassforum. evolution of the lt1. If you get the dual exhaust SOHC 4. 6 rockers. a 92' ZR1 really how much quicker is the ZR1??? Is it really worth the extra cost??? Would the 92' LT1 be fast enough and whats the 0-60 times on these models??? Also are the ZR1s difficult and expensive to maintain and if it breaks down??? Any thoughts????? The 1997 Z28/Trans Am/Formula were LT1 engines. Radiator. 5k rpm; if you like to accelerate and generally be lively with the car, you will appreciate it a lot. The valves are the same 1. I have a similar leftover-parts engine. The LT1 intake is for the reverse flow the LT1 and LT4 engines of the 1990's it doesn't fit the L31 bolt pattern and lacks coolant returns. The L98 was renowned for it's low end torque, the LT1 evolved that into a less peaky but MUCH more broad torque curve without the engine gasping for air at 4500 RPM. I'm running the stock Ramjet injectors, can't LS1 vs LT1. If the goal is to just run a hone through it and re-ring Chevy LS1 vs LS3 performance, specs, reliability, upgrades, & more. 2L V-8 Displacement (ci): 376 Bore x stroke (in. For example, the L31 Vortec 5700 (5. The Vortec intake ports are raised about 1/4". 49 posts · Joined 2013 Add to quote; Only show this user #1 · Feb 23, 2016. So the Bcar LT1 really acts like a truck engine because GM used it as the blueprint for the L31 (same cam, functionally the same heads but w/o reverse-flow cooling) to get great The main difference are CAM and INTAKE. It's a gen I. If you did or didnt want to add the full roller rockers, would add/cost about 10 hp. In a non-emissions application, ditching the emissions code for EGR, Catalyst overheat, canister purge and the like in the 93-95 TBI PCM to make room for code changes. If you're only buying the car to drive around sedately and look cool, then the difference is less pronounced. These were the major diffrences between the two for the performance diffrence. stock bottom end is solid and will live up to a little boost and an occasional spray, anything more than that you should be looking at a new bottom end. Does anyone know how GM populated this table? It seems like the L30 and L31 tables should have some type of relationship that's easy to see. I don't see any real advantage to running the p59 vs the p01, but I am not an expert. Hard to correlate the LT1 tables to the LS1 since the LT1 uses MAP vs RPM and the LS1 uses Cyl Airmass vs RPM. 477/. RobDeville. It is Chevrolet's last production first-generation small-block. The Timing tables can go from 0 to 110 degrees. Horsepower ratings for the various LT1 engines range from 260 hp to 300 hp depending on the model application and year. What is a more reliable setup, LT1 w/4L60E or L05/L03 w/700-R4 ? #3991492 – Available on the LT1 engine and over the counter. It is the last production Generation I small-block. When 4th Gen Camaros received a facelift in '98, they also got the new all aluminum LS1 5. GMC Savana / Chevy Express) and takes this exact same GM 12554314 teflon RMS. The LT's were probably better built. 574"/583", 4L60e, shift kit & corvette servo, G80 GT4, 3. 94/1. RPO L31 5700 Vortec is a Gen I motor with hydraulic roller tappet cam and hydraulic roller lifters. I think I found out why. lbs 5. 5). Used flat top pistons and Vortec heads with a carb manifold. Also the LT4 came with larger #28 injectors. 6 on exhaust. So I don't think the ports will line up. The LT4 was offered as a crate engine and GMs rating was 375 hp. Main difference aside from the block material is the heads, cam, and intake system. Chevy engine engineers take us for a deep dive. Though the LT1 has a different block and heads than . Dry flow. e. Leave a Reply Cancel reply. Yes. Web Jan 27, 2021 1. The balancer is a two-piece assembly with a pulley that bolts onto the hub. Using that cam will be around 10 hp down compared to the Ramjet 350 cam. AIR system was EPA allowed to be disabled on 95/96, note GM TSB on it and factory reflash to disable it. Chevy keeps using the same old advertising names over and over again just like the 1990's LT1 has very little in common with the original LT1 of the late 1960's thru early 1970's. Prev. The studs are better than most press ins but. I have discovered with an OBD2 LT1 timing cover a LT1 can be run with a Vortec or 0411 PCM without a cam sensor. 5 rocker on intake and can use 1. The ramjet is rated 350hp & 400# torque. The rebuild costs are the same and L98 waterpumps are a lot cheaper than LT1s. With its 5. I have used it as well as the LT4 cam several times in L31s and it pulls noticeably better than the stock L31 cam or the L31 Marine cam. The LT4 and Extreme HD LT1/4 kits are Look at the AI website. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Between a car with a good body and LT1 vs A car with TBI and GREAT body. Joined Jan 3, 2019 Messages 11,005 Reaction score 18,326 Location Tonopah, AZ. i mean, chevy has modern 4cyil Turbo´s, V6´s and V6 with turbo all with DOHC and VVT but their 8cyl. As you can see, the stock LT1 cam with 1. Still based on the classic small block Chevy, but with the optispark, reverse flow cooling, and other features. So I recently bought a 1996 Tahoe 2 door 4x4 with 3. But the L98 block as been around since the 50's and the LT block was only produced for a few years. It is responsible for dissipating the heat generated by the engine through a network of Something I have noticed, all the B/D cars have a 20 degree offset on the timing table, and the F/Y cars don't. Now my L31 is on its last legs, oil pressure at L31 vs LT1. the LT1 came with #24 injectors. R. Ran fantastic before Opti died. The LT1 gives me 285HP stock MY second criteria is a manual trans either a WCT5 or a T56 either available as an existing engine trans combo or a relatively easy as in painless mating of the two. 6 full roller rockers if you are changing the springs. 5 rockers, it's listed in the link I posted. The engine will include intake to oil pan (I'll try to get the accessories as well,) engine harness, and the PCM. 3 (LM7) iron block. The LT1 has an elaborate oil separation system built into both valve covers, but that's interesting to hear the C7 owners experiences. The 96 LT1 uses MAP Sensor tables for spark advance and the 2002 Express Van '0411 L31 uses MAF Sensor tables for spark advance. 5-5. Port Volume vs. The LT4 has a 195 cc intake port and 2. 7-liter V8 configuration, it produced 300 horsepower and 330 lb-ft of torque. I forget the measurements offhand,but I figured since the L31 and the LT1 are very similar engines, I’m curious as to if the same upgrade could apply to an L31? I know that the Vortec heads can’t take a ton of lift, but the stock cam is small compared to some of the aftermarket options. (See sidebar “John Schaefer LT1 Optispark vs. in the LT1 AND the ZR1 models only of 330hp. 459 valve The LT1 is a tried and true small-block Chevy that will do hundreds of thousands of miles if you maintain it properly, so is the 4. View Profile View Forum Posts Is the commanded timing vs actual timing correct and the data logging wrong or is the commanded timing not being achieved due to a software problem? There are times when I wonder if an operating system for an L31 would not be better suited to an LT1 than an LS1 opsys, especially if the final L31 opsys has cylinder variation parameters. Thread starter Crazydavez28; Start date Apr 5, 2019; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. 412"/0. Conventional SBC block with standard flow but the port & combustion chambers are Reliability has nothing to do w/sequential vs batch fire, and some LT1's ((up to '93) are batch fire -same as the L98. 430 111* vs 190/195 . 525 / . LT1 block has a casting number ***327 '00 Safari SLE with '95 4bolt 355 LT1; decked . If both are 1-piece rear main seal. This may make for Since the 2001 Chevy Express Van with the 350 Vortec engine has a crankshaft position sensor and Camshaft position sensor, it’s got the same firing order as the LT1, same ignition coil And module. The difference between the two, i believe, is that the LT1 is a reverse flow coolant system, cooling the combustion chambers first before the block (unconventional from the Gen 1 small blocks). I run the 845 cam with 1. 7 L. The LT1 engine utilizes a unique reverse flow design, where the coolant enters the engine at the rear and circulates forward, providing better cooling to the hottest parts of the engine. with EPA restriction in creasing in 1972 yr production max 350ci hp was 255 and the 454ci engine was The subjects I see and hear most often in the LT1 vs. Either are good motors, I don't know if With L31 heads, I would start at 34 degrees initial + mechanical, all in by 2800. Wet flow vs. 50" (38. I had a brand new in box L98 cam so I ran the L98 cam vs the Ramjet cam on DD LT1 6. I used the 2001 Chevy express Tune for the L31 engine, deleted the cam position sensor and the emissions stuff, Vats, etc. There are similiarities but not enough to make a swap really worth your time. 500" valves from the factory The 1996–2002 5. I am suspecting I have a weak (lazy) thermostat, as my LT1 Cad seems to take around 10 min before I get any heat, blower comes up, but cold air. 2-3 bar MAP sensor with VE and Spark Tables to 8,000 rpm. I would think about a LT1 type cam while you have it out, easy 30 plus HP plus it will sound a lot better at idle. that a lot of the ZR1 guys have to worry about. file. Converted to 24x with torqhead kit. There are earlier heads Chevy calls Vortec and there are 305 Vortec heads, they aren't the same thing at the 350, L31 Vortec head. You can measure the compression hgt of the pistons out of the engine by measuring the distance from the top of piston to the center of I got an offer today for a LT1 out of a 96 Corvette. /lbs of torque, the LT1 proved to be a potent powerplant for the C4 Corvette. The L31 Vortec is the LT1 heads configured for the Gen 1 350. Essentially the vortec heads and LT1 heads are basically the same style head. One of the biggest changes to mark the arrival of on an engine dyno a stock l31 with a airgap dualplane produces about 310hp you can put a lt4 hotcam in a L-31 without machining the heads, it takes specific springs, seals and retainers , that cam would put you in the 380hp range and if you stay with 1. 428" lift on a 111º. 940"/1. Also used in the HT383 crate as well. Skip to content The 5 Most Common Chevy 5. Probably the most cam bang for factory TBI is the 1995-97 LT1 cam part 12551705 it times at point oh-fifty with 201/208 degrees using . You need to start with a base 2001 Express Van tune for an L31. Pivot ball vs full roller. The B/P rules state that the correct engine was an L-46. 6, it's the exact same motor they used in the Mustangs. B/D-BODY LT1 VS VORTEC C/K L31 | CHEVY IMPALA SS FORUM. 2nd question is the L31 vortec cam the same one they use in the impala ss Lt1? Thanks for the help :welcome: Simply put do the late model truck L31/vortec and the gen II LT-1 share the same intake bolt pattern? THANKS for your help; for the right person this is a no brainer, but right now thats not me, the ans. LT1 Valve, Intake 1. (2) LS1s have more aftermarket parts available than LT1s. What will be different? I know the balancer on the front end is different than the L31 but i was considering using the LT1 hub and a 1" spacer block to drive the accessories (have access to a lathe). Obviously the TorqHead conversion is easier, but either way, it can operate our 4L60Es with I have a brand new set of L31 vortec heads boxed up I used for a short while while I was getting some 186's redone and actually thought those heads were pretty decent. I wouldnt pay over $3000 for any intake setup, the only reason I have any different intake is because of the deal I got. 12200411 pcm can operate our 4L60E, whether the 0411 operates the LT1 with an L31 opsys (1 coil) or an LS1 opsys (8 coils). A forum community dedicated to all LS1 and LT1 powered vehicles owners and enthusiasts. I would go with 1. I did a comparison between the ramjet 350 and the stock L31 and came up with: The ramjet engine is basically the L31, except for having the ramjet cam - and a specifically designed fuel injection unit. Be sure to keep these cranks separate so they don’t end up in a regular 350, and don’t ever use a regular 350 crank in a LT1. The L31 vortec 5. 78-inch bore. I think a compromise woudl be an LT1 377. Save Share Reply Quote 1 2. 0 The LT1 rotating assembly is identical to a one piece rear seal 350. is a V8 truck engine. Are there more disadvantages to using LT1 Iron heads? I wonder about valve size, port shape and all that. 1970 vs 1995 vs 2017. Actually,there are a couple of pullouts listed now for $149. Cadmaro. A temp sensor is a temp sensor, a O2 is an O2, need to make the ECM think there is an Optispark or something to make that mess work (to me it sounds relatively "easy", but then again, I am in the electronics industry and have friends who work on ECM design teams at my company), fuel injectors are Hi, LT1 Aluminum heads are certainly lighter than the Iron. Despite having 3. GM LS1 vs LS3 engines. But does have the mech fan trying to cool things off. i figured i could use the caprice as a winter car, but i don't need a winter car. I suppose manifolds are manifolds and there Even the 395 Ramjet 350/HT383/Marine 350 crate engine cam is a nice addition over the lame stock Vortec 305 L30/350 L31 191º/196º 0. 94 has a bit diff exhaust manifold AIR fittings than 95/96. yjgwn aee aecmq coyiuu vuavgt ubaw kgknc ydled sfepxtf clqh