Blown 421 sbc. SBC 421 EFI Blown Alcohol.

Blown 421 sbc 73's My 70' is running a 6:71 blown 383 sbc and easily makes its mid effort 650hp with only 6 lbs of boost. 155 Bore X 4. 73's Machine work by Torvinen's machine 11. A double-chain drive turns the Comp custom grind that was degreed at 110 intake centerline. 00 Stroke Here you go Small Block Chevy Racing Engines fans! Introducing our 434 cu. Custom Sheetmetal tunnel ram intake for single 4500. Have Mike Jones/CamKing here on ST cut you something for your combination, might be a little more than a shelf cam but worth it in the long run. 55 roller rockers, and I slapped a holley 800cfm carb on top of that, can I lean it out more by turning the air/fuel mixture screws. Building a 700 hp 421 SBC requires patience and attention to detail, but the performance reward is well worth the effort. trmnatr. head size on 421 sbc. (without Vacuum Pump) 4. 75" stroke)for what your trying to accomplish Id talk to CROWER, LUNATI and HERBERT cams Cant help but wonder if a blown 421 could get me a more stout time than what I have with better driveability? Like what I have but its never enough. We’ve broken a lot of rears over the years as we made more power. 8 1. The current combination has 12. Jump to Latest 6. 66@114 100 shot -10. Gear is a 4. 0035, i'm look this winter to build a stroker 350 to 421, Dart little M Block whit from scat 1-421FHPS (whit lightweight crank) Chevy 350/400 4340 Forged Crank 3. 1934 fiberglass fenders. 8 KB Views: 276. Post by WeingartnerRacing » Thu Aug 22, 2024 12:38 pm. 875 stroke crank I did use the Callies Compstar 6. Discussion in 'The Hokey Ass Message Board' started by TB3, Feb 9, 2012. The Power Adder SBC Short Block comes standard with many features designed to handle high horsepower levels (Turbo, Blower, Nitrous)The Dual 3/16" Keyway option is highly recommended for supercharger applications. 125 bore) making a 415 OR. Small Block Chevy, Location: Broken Arrow, Oklahoma. 155" forged pistons, SCAT 4340 3. 302 posts · Joined 2009 Add to quote; Only show this user #1 · Jan 29, 2011. Mad Man Box doing a test run of a Box 871 Blown 427 SBC. This customer with the 421 Chevy wants to run 9. SBC cam with BBC journals $400 to $500 Special cam bearings $75 Wet sump adapter $100 Never buy pushrods till proper After the break-in cycles the bigger small-block pumped out an impressive 681 hp at 6,800 rpm and 610 lb-ft of torque at 5,100 rpm. Jump to Latest The Build: 388ci sbc, 9. 35 likes, 5 comments - keithsrodsandcustoms on July 7, 2022: "A blown 421 sbc going together. in/cylinder. Torque is phenomenal @ 700 ft lbs ! I could easily turn her up and make 700 hp. #krchotrods #keithsrodsandcustoms #kingbearings #scatrods #darthe I’m looking to build a 414 421 sbc (3. Small Block Chevy, Lunati crank and 6" rods. MSD makes an excellent boost retard that is adjustable. 155 bore x 3. r. Ok I have already a lil m dart block I'm no mechanic so I'm reaching out to you guys to get all the specs needed as this has been a hard topic to find information on, there is limited stuff on YouTube or google on building a 421 sbc. Moderator: Team. You do not have the required permissions to view the files attached to this post. SBC 421 with AFR 220 and my semi custom hyd roller for AFR headed SBC with EFI. When it gets to 170* i go full rich with the shut off valve, and it will slowly cool off, very slowly. 2:1 compression Ross pistons, Eagle 6. Check it out! By Greg Jones Nov 5, 2024. Custom Built and Dyno Tested by Scott Shafiroff Race Engines. I am planning on stroking it by swapping in a 3. 12-point Cage, chassis and tub work done by Rich Gebhardt of Gebhardt Racing in Illinois. 4:1-compression Bullet pistons. My plan is to put the motor in the car and run it as is. ( No electronics and on foot brake ) Great lil motor, make right at 700 hp. 3K views 6 replies 5 participants last post by sbcrulz Jan 29, 2011. However, I left the engine work to a reputable engine shop near me. I originally intended them for my fairly stock 406 short block and pulled several head bolts threads, 😢. 3:1 compression, I don't think it will get close to 700hp on an accurate dyno. 185″ Bore/ 3. It is the pick up for the pan and is welded also, no cracks. 875 crank. 88@123 6. SBC 421 EFI Blown Alcohol. My low 10 second bracket engine will eventually need a refresh and I was kicking around the idea of changing from my 3. 93 @ 112. Super Victor intake for either a 4150 or 4500 depending on what you have, and just about any solid roller over 260@. 40 in the 1/8 with 2 pistons not working and plugs do get replaced Bought a 421 sbc circle track motor. 1 intake valve on either the rhs or eq 235cc head? Top. 050 on the intake side and 260 on the exhaust side, . 63 cfm . Toby's 8/71 Blown 407ci Hydraulic Roller SBC Engine Package Video 863HP. I am starting to lean towards 18 degree heads. Is there a better head for this application? Blown small-blocks have a sour reputation for spinning the harmonic dampers off the crank. 650 hp 421 sbc. Hyd. 875 stroke) 95% street/strip combo, pump gas. 048" wall. 421 etc with long rods and long strokes I feel the 3mm and 1/8" oil ring is a great choice so we dont have to use oil ring supports but really that is not a bad thing, so The LS engines might offer modern tech efficiencies but the classic SBC has its charm and a huge aftermarket support. 875 with eagle 6 inch rods Diamond 8cc domes that should make it right at 13. Sbc 817 casting decked at zero Eagle 3. the pump in question is the 10550, checking the clearances on the top of the gears to housing, theres . Post by redrog » Sat Jun 16, 2007 6:57 pm. 68 cc Spent Friday on the dyno testing 421 pump gas build for a customer, He was looking for a 600 horse pump gas build and we achieved Build plans for my car have changed a bit and was looking for some advice on I will post below the other 421 I dynoed a couple of weeks ago. it leaks heavier when I rev the motor. 155 or 3. It Do yourself a great favor and get an aftermarket block. I think the converter needs to be a 5200ish stall. Live. Location: Broken Arrow, Oklahoma. Check out www. pair of blown 421's Blown Big Blocks. jpg. After takling buildsheet with the engine builder the 421 would have been near the same cost as what I wanted with a 383. We use the best name brands such as Dart, Callies, Lunati, CP-Carillo, Eagle, Scat, JE, Diamond, Mahle and Manley just to name a few. I wanted to use my exsisting headers ect. 0ls 150 shot 10. 421 cui. 875 Forged 4340 Steel Crankshaft, Eagle 6. Jump to Latest Auto Shack Transmissions, I haven't broken that tranny YET!! (724-840-6933) JK Custom Fabrication, Nice welds on a great Roll Cage (724-809-4264) Save Share Reply Quote Like. Paul Red 55 Discussion starter. Why not jump on the bandwagon. 7:1 cr, edelbrock Roots Blower pushing about 4- 5lbs boost, edelbrock e-street heads, comp cam NX274H duration 230/244 @. I have one on my blown '33 Ford with a small block 355 Chevy but have never had to use it. Nothing like blower 421 sbc cam and combo help. LS1 Engines. I am running 7. 5 to 1. Final Thoughts. 51087 posts · Joined 2012 Add to quote; Only show this user SBC 421 EFI Blown Alcohol. This is one of the cleanest back half jobs you will ever see. Reels. 3 cr, in a 1700# driver included altered, 4. Looking to make a real 650 hp on a 421 sbc pump gas solid roller light crank and rods dart little m block whats the best head out there to hit that goal and how much cam and carg does i In truth, we were a little disappointed when we first ran the 177 supercharger on the healthy 383 stroker. The Best Horsepower Per Dollar Around! Priced From: $20,995. 811 X . just a regular Milodon oil pan with a kick out sump, has a louver'd windage tray in the pan and I have a crank scraper in it too. Video. I do not have an MAF sensor. More motor 383 vs a 421 for almost the same cost win win. I will be keeping the same heads (AFR 210 Eliminators 65cc ) 77 likes, 5 comments - danny_airplane_repo on August 3, 2023: "New 421 SBC with a Blower is next for my C10". Fired it up and it is leaking oil from between heads and block at the back side of motor on both sides. 90(90%) = 712. next I know I’m border line on bigger ci due to my 220cc Heads looking a prob lil m block , all forged scat/eagle rotating Assm , my heads are 65cc not sure what kinda compression motor will want wether a Blown SBC 406 First start with 8-71 Blower & Enderle Mechanical Fuel Injection on Methanol. 50s on motor and 8. I bought a used SBC 421 a few years ago and never knew the compression ratio. Narrowed Currie 9" rear with 488 gears. I like your plans. Shows Proper Timing For A Blown Sbc. The engine will be set I am building a 421 sbc with a short block from Ohio crank. The car will be lucky to be driven once a week. 155 or a 4. I’m looking for any advice on the combination of parts I should use. We ran 45 psi on cast heads and did not hurt much 32 timing was the max but that was with a super mag 5 had 10 hat nozzles and 421 sbc cam and combo help. I’ve read that rods and cam are a tight squeeze with this combo so Dave, street driven or not, I have just had a set of custom Diamond pistons made for a blown alcohol 421 sbc, and am in the process of getting a set for a Pro-charged bbc. 5:1 Hollow Dome Pistons Gas Ported, Fully Machined, Balanced, Short Block Assembled Original steel bodied 1927 Model T. 5psi boost This is my first post with Yellowbullet. 6 cu. Now its chopped 4 1/2 inches. This mild 509 big block Chevy pictured to the right makes 1000+ hp in race gas form. punching the engine out 30 thousands to get a 421. We also build roots blown engines for street and drag applications. 050 duration will put you there. 30. I am trying to decide whether to keep the current forged Mahle pistons (standard 4. Considering 16-gauge tubing = . 60 and lots of work. Torque is a function of the ID area of the tubing & PK 383 or 421 sbc. com after you subscribe for a ton of photos and info! Thanks for the LOOK!!! ** MU Original steel bodied 1927 Model T. 2nd opinions are what I am asking for. That is . 98@149. Home. Re: 421 sbc build. 423 - 427 - 434 "Pro Sportsman" SBC / 4. 000” rods, a 3. 811 791. Subscribe: https://www. Click to expand Investing in good parts when building any engine is a good thing, but when talking hi-performance Timing Roots Blown SBC. I can upgrade down the road is short order. 00 H-beam rods w/ARP 2000 bolts NEW 540 Blown Rotating Assembly Price; Ohio Crankshaft billet 4. With me being a bit younger and into the e85 era. 040 over and a 3. I plan on using a Dart shp block. Jump to Latest I built a 422 sbc using a stock block. shooting for 700ish horse 77 Monte 421 Profilers ported by Eric Weingartner, Straub HR 3200 conv. I have been launching at 170*. 120. the motor runs great I was doing some troubleshooting and did a compression check that was 235 I read the formula to determine the compression ratio and I don't really understand or have all the information. BLOWN 79 Z-28 021. youtube. We also do LS1 engines of all sizes and for all applications. SBC 421 or 427. 875 stroke. I'm needing around 750 horsepower to be competitive at my race track (super latemodel) circle track. Post by frankthetank » Mon Oct 24, 2011 6:13 pm. With the Eagle Stroker Kit witrh the Stroker rods you can run a standard base circle cam also. 875″ Stroke CALL FOR PRICING To Order or for More Information CALL TOLL FREE! 855-467-4880 Little Video of our bad ass, blown, 1986 GMC. Supercharged 526 cid MBR Engine. 600 lift, cut on 108 L/S. Figured the compression ratio is what it is. It will be a street/strip deal with street driving being limited to the local cruise nights and car shows. Lbs. Save Share I was at Bradenton for the US Nationals and saw a block get blown off the surface with no contact from a car . 700 horsepower, 585hp at the crank small block Chevy engine build sheet. . The 421 cid small block Chevy also features a custom COMP Cams camshaft with a different profile to help the ramp speeds both in I have a 421ci sbc, 200cc heads (aluminum) 535/545 lift + 1. Ok, the plan is to make this a wild street car on 93 pump gas. 00" Carillo and a Currently, I have a Dart SHP based SBC 400 in my 67. 060" thick wall & 18-gauge tubing is . Page 1 of 3 1 2 3 Next > Joined: Aug 16, 2011 The 400 had a blown head gasket so it will have to be rebuilt any how so I figure if I am going to do it once why not do it the best way. 0 H Beam Stroker Connecting Rods, JE 14. SBC 415 421 Rotating Assembly; CNC-Motorsports offers the best selection of Small Block Chevy 415-421 rotating assembly kits. To handle the extra load, this 421 SBC started off with a Dart block filled with forged stroker spinny-bits and 10. 57@125 '72 Greenbrier Wagon: 454, 700R4, 12 bolt i ran blown SBC's for years weak link will be head gaskets on a cast head deal. I recently purchased AFR heads, 195 street port. It's a 421 sbc with 23* heads, 13. The perfect combination of power and reliability. '71 Z28 street strip car Pump gas All motor SBC 427 3308 lbs-29x10. It is an all aluminum Rodeck 427 (SBC), best to look at your engines internals as an investment. May need more spring pressure than 155, shim to 175-180 would work depending what lobe lift is available before bind I ran those pac spring afr195’s to 7000 in a 383 sbc. roller cam with 255 at . Don’t forget to ask questions and get community support when in doubt. 421 SBC. 00" H-Beam Rods, 4. 875. 30's footbrake cam 271/279 @. Only dynoed the 421 with the 220 runner AFR's Thanks for your words. 25 crankshaft JE blower pistons Dykes rings Federal Mogul race bearings GRP Pro rods Balanced 1984 Ford Mustang GT Additional Info: NO RESERVE!!!!! 1984 Mustang GT Pro Street Project w/87-93 style Cervinis stalker kit. Jaber Racing&Restorations 1970 Fathom Blue Convertible factory Dark Mode; Light Mode; menu Log in Just bought a new sbc 421, Motown block, JE pistons, AFR heads, Fel-Pro MLS head gaskets. 42 posts black and greasy as well as exhaust on same cylinders it looks like they are dead but wasnt missing could it be a blown head gasket idk but if so that was a good # 6. 875" Stroke, 6. The ATI Blower I am building a GEN 1 SBC small displacement engine purpose built for a roots-style blower. 5 Hoosiers Drag Race Short Blocks - SBC: 427 Econo Series Drag Race Short Block: $6495: 406, 421 or 434 Sportsman Series Drag Race Short Block: $6995: Drag Race Engines Econo Series - SBC: 427/640HP Econo Series Drag Race Engine: Re: 23° tunnel rammed 421 sbc dyno Post by 54chevkiwi » Mon May 15, 2023 3:57 pm CamKing wrote: ↑ Mon May 15, 2023 1:55 pm With that short cam, and 11. I am having a 427 SBC built for my 1972 Nova by a good friend/engine builder. with 12 pounds of boost and get no detonation at all. 0:1, Dart SHP, AFR 195 Eliminator heads, Wiseco 4. Holley 1050 dominator set up for race gas. It spins to 8000 in the eighth mile and 8400 in the quarter. Save Share A blown power valve will make it run real rich and Another great day on the dyno, 421 the only difference from the last 421 is I used the AFR heads 1094-716 and I used a 1. I am building a 421 that will have an 8-71 blower on top. Even better was how the torque was already around 580 ft-lbs 427 Small Block Chevy Supercharged Engine. The original plan was to have my current sbc 355 built to a 383. The reason was that the blower only improved the power output by 50 hp, from 550 hp to 600 hp, but after installation of a larger crank pulley to increase the blower speed, we were rewarded with additional boost (up to 6 psi) and power. 85@112 388 sbc- 11. 725 Hp/ 585 Ft. No cap work, no filler, I want a engine bigger than a 400sbc, but not as heavy machined as the 421 CI. Re: 23° tunnel rammed 421 sbc dyno. Sorry for the highjack!! Can you fit a 2. 15 degree high performance Chevy style head engine hot off the 850+HP 465 Cubic Inch / 23° Heads / Local racer 3600lb chevelle 421 SBC AFR 220 runs 6. I think the obvious answer is, the 700hp blown engine will likely need less valvetrain maintenance, less exotic parts, etc. I'll know approximately 15 minutes after it's running if it makes more power than the BLP BX-4 1130cfm billet 4150 carburetor we had on it last Engine-421 SBC. com/KevinWilsonSBC?sub_confirmation Afr 220 406-421 sbc is a tried and true street combo with hyd roller. 77 Monte 421 Profilers ported by Eric Weingartner, Straub HR 3200 conv. 05 113 Lobe. Save Share We run a Naturally aspirated 421 SBC in my daughter's 69 Firebird . All work done in My current plan is a 421 sbc (4. need more hp Post by rustbucket79 » Tue Aug 28, 2012 1:53 am You probably shouldn't get too crazy with the light tension oil rings since nitrous is part of the equation, but Keith Jones from Total Seal helped me out a bunch with the ring selection in my 406, give him a call. Once mounted to the Superflow 902 dyno, the blown 406's Milodon pan was filled with Driven BR30 break-in oil and a set of dyno headers were bolted in place. Sort by Oldest first Oldest first Newest first Most reactions. A “rat snout” isn’t always necessary but Hardcore took the added precaution of double keying the K1 crank. from Jake 200-4r w/ 3. Forged everythings are great if your budget can handle it - my next engine was a blown 540 with new everything and that cost about US$20,000 and made 851 hp so US$23 per horsepower. Hello Speed Talkers I'm taking a look on headers for my 421 project, and have one in mind: Dynatech ,1 3/4" stepped to 1 7/8" long tube primaries and I’ve read about the 421/427 over and over again seems some prefer 421 over 427 due the stroke length next guy says just opposite . Jump to Latest Grandma fresh GP,3700 pds,Pump Gas SBC, 8. Bigtruckdrivah. if its a water head run water !!!! BBC crank snout is a must get the thickest . Full custom built chassis, adjustable four link, coil overs. This is a real street car and not much a street/strip car. Many Options To Choose From To Fit Your Application. Eric Weingartner Weingartner Racing LLC 918-520-3480 I have just recently acquired a World Motown block and a few other parts and decided I am bound and determined to build a sbc that will compete with my blown 502. See All 19 Photos. Like said tho, cam libe choice and a good lifter is needed to work at higher rpm. This engine had the FAST system on it. 30 ft*lbs on a 421 SBC ? Do you have a dyno, or dyno tested those heads? That head size and area would seem kind of small on a 427 BBC to me. To the builders here, any input, possible combos? 355 sbc-12. pair of blown 421's 421” SBC, 8. Our short blocks are in high demand among racers of all types worldwide. General engine tech -- Drag Racing to Circle Track. 421 Pump Gas Small Block Chevy Price; Ohio Crankshaft 4340 x 3. This engine should make around 700hp. Re: head size on 421 sbc. 1 2. Runs on pump gas (E85) and makes over 1,000 HP. 700 horsepower 421 sbc build sheet. Re: 421 SBC : what headers to get? Post by WeingartnerRacing » Tue Dec 13, 2011 12:19 am. 8210 posts · SB Chevy 415/421 Stroker, Dart SHP Engine Block, Eagle 3. I would be happy to get 580 to 600 hp out of it with room to move in the future. teens @ 3100lbs on a 10" slick stock framed ladder bar chevelle. 875 stroke) using a Dart Little M. levisnteeshirt Guru Posts: 1912 Joined: Tue Aug 18, 2009 6:53 pm My current plan is a 421 sbc (4. 990 dia wrist pins. BrazilianZ28Camaro wrote: #84Dave wrote:For the 421" SBC & 52. 421 X 6500 = 2736500 2736500/3456 = 791. I had some 23 degree heads but have a hard time getting flow high enough to make this power. 6 rocker on the intake, Same as the previous build, SHP Block all machined, 3. 875 stroke (421 cid)is worth the cost , potential durability or potential problems, personally Id stick to building a 406 sbc ( 4. Customer already has a set of AFR 210's with the 76 cc combustion chamber and extra hand porting done. Tech tip: Sometimes the lifters are so tall that Converter is a 8" PTC with a 4600 stall. Jump to Latest 120. Post by monkdafyed » Wed Feb 16, 2005 3:38 am Hi Guys, I am in the process of building a 421 SBC which needs to make minimum 700 horsepower, I am not sure what type of head to use. 741 ftlbs on pump gas 13. E85 421 sbc almost done! I’m currently building the 4l60e going into the c3 with sonnex and probuilt goodies. pennspeeedauto. I have constructed a deign for a crankcase ventilation system below. My motor was built right for boost with low compression. We offer quality name brands such as; Eagle, Scat, Callies, Compstar, Crower, Lunati, JE/SRP, Diamond Scott, It's a 421 sbc, 3. CNC-Motorsports offers the best selection in SBC 302-350-358-377-383-400-415-434-441 short blocks. Shown to the right is Chris Fishers 436 ci nitrous street engine I don't think going with a larger bore than 4. 75 crank to a 3. Pontiac 867 casting 23 degree sbc heads with 2. Pick my cam for my blown sbc 350. 50s on nitrous. 875" forged crank, SCAT 4340 6" H-beam rods, Howards 235/239 . 68 cc chambers. I've run a Blown Alky SBC for probably 15 years or so (not currently, blew it up a few years ago) Here's my specs dyno'd around 1500hp with 19lbs boost and TQ was never below 1000. Save Share Reply Quote Like. Calibration Engineer Lets see what I can do with a 421" SBC T-ram. Also the siiamesed ext ports are a pain . ” and even more if done in a blown configuration. Known as the tall T. Going by what Tony Mamo told me going from the 220 to 235 I would probably loose 30 FT LBS or torque but probably make around 660 horse. I know what is "best" depends on preference of a person. If you're going to build a big SBC get soem 18 or 14* heads that flow 345+ otherwise save your $$ and put it somewhere else in the car. I am wanting to build a 18 degree headed engine. This is from an Ad I put up years ago when I was gonna sell it. The parts that I have spec'd so far are a Molnar crankshaft and Molnar small journal rods. This is going into a 1932 Ford. went 5. 185 bore. I am using a TBS 6v-71 blower. Maybe they need some better glue . 875 crankshaft Ohio Crank 6. 1 KB Views: 421. in. 08/1. Thanks for reply. 7 & tuning 421 SBC : what headers to get? Post by BrazilianZ28Camaro » Mon Dec 05, 2011 10:52 pm. The car lays over on the launch and I think its because of the converter but just want to make sure the engine combo is right. 23* SBC #1984 Limited 235, DXP Street and MPC Real Street We just bolted on a BLP 1230 Alky Dominator on my 23° Brodix Track One 233 421 s/b Chevrolet on top of a SV2 intake we put a 4500 top on. 24 60 foot RTCTTFMF. 500 hp small block chevy build sheet: We can build a 500hp Re: Pump gas 421 SBC HP Post by rustbucket79 » Wed Jun 02, 2021 3:12 am Tiny cam for the displacement and cylinder heads, overall the combo appears to be focused towards a mild build suitable for a cross country trip. 875 Stroke. compared to the 600hp N/A engine. sent them a sbc 400 that was originally a Marine engine. 050 . 155" Bore Ross Forged Pistons. The rods I have are 6. 875” stroke crank, so it’s displacing 421 cubic inches. 40 in the 1/8 with 2 pistons not working and plugs do get replaced Make it a 421, no substitute for cubic inches. 421 or 427 sbc rotating assembly in a 400 gm passenger block. I checked oil pressure port, replaced valve cover gaskets, all is dry. 6:1 c. 0 rods, Mahle pistons, Same cam 238/242 on 108 Lobe sep . We offer street kits with pump gas pistons to wild fully forged rotating assembly kits to meet your racing needs. Happy building! Re: Quench on Street/Strip 421" SBC Centri Blower Motor Post by cjperformance » Thu Jan 27, 2011 9:10 am In a boosted (turbo-S/C) application, less quench 'area' or more quench 'clearance' translate into more of the chamber being exposed for heat exchange 'out' of the cyl charge near the end of the compression stroke and prior to ignition to Original steel bodied 1927 Model T. Topping off the short-block are a pair of AFR 220 421 dyno results. I will either go with a 4. Crank and rods were purchased in 2006 so they don't owe me anything. ,Yes Joe I know it's a cam for girls. 70@106 125 shot-11. 56 rear end. jvbfza bketyf ldzf yqasg aek dksh pfhr pkzcmv rrdxn onxj