Gt40 heads on 351w how much hp. 5 in compression ratio.
Gt40 heads on 351w how much hp A couple of years ago Hot Rod magazine took a junk yard 351W and made 388 hp with basically stock GT40P heads. Look at it like this, the lightning made 240 HP vs 210. A few years ago, Hot Rod magazine made 388 hp on a 351W with basically stock GT40P heads. What is needed to make GT40 heads work on a 351W? I've read just about every post on every forum and cannot find a definitive answer on what parts or work is needed to make it work and furthermore if the stock headers will still fit. so other then that the GT40P Heads was made same way as the 351 Cleaveland Heads just more modified and better results then the regular GT40 Heads the regular GT40 heads was used on the GT 350 mustangs but so they needed to make a mustang that can beat the GT350 was when they come up with the new Cobra 5. Although the D0OE 351W heads are I was given a free 351w 1974 shortblock that had a fresh rebuilt with 0. Installing GT-40P Heads: Iron Head Horsepower. I have a set of GT40 M-6049 Y303 Alum heads. I currently am about to pull my engine for rebuild (1988 F150, 4x4 BW1356, C6 Trans, 351W EFI). You could make 25hp more with those. Found a used GT40 lower and Explorer upper, used Ebock 1. The 351W heads are the exact same size as 302/289 heads, just have bigger valves and combustion chamber. Okay, I'm doing some studying and planning on which set of heads & cam should I go with on my 351w. The HO heads are factory Ford cast iron GT40 heads, which came on a few vehicles like the '93 Mustang Cobra and '93-95 Lightning. Hot rod made 390 hp and 405 lbs of torque on a 351 with gt40 heads. you need to look at what you want out of an eng and find ways to do it. Besides, running a Mustang at high speed is like trying to break the sound barrier in a refrigerator. 60 and still be cheaper than Aluminum Heads. A popular example of this is the GT40 head used on higher performance 302 engines being swapped into a 351 for higher flow numbers. Thinking of putting GT40 heads on her in the winter or have the heads get a nice 3-angle valve job locally for about $300. Those Eddy RPM's would The GT-40 would be about equal to a '69-70 351W head I would think the only issue being to find a set machined with 1/2" head bolt holes (the Ford Racing X306's are, IIRC) as I think only the versions from a Lightning or Cobra with a 5. all that on a 351w with forged rotating assembly will make alot of hp/tq for little money and be fun to drive. 0 explorer and adding a e303 cam also. The physics just don't add up. phoenixengine. 0 The "Original" GT40 Intake As our foxes get older and more collectible people are starting to look at what They also installed GT-40-type cast-iron cylinder heads, the tubular “tuned” manifold, tubular stainless-steel Hi. With my initial intake setup, I don't expect more than 400 hp, But I would like the heads to be able to support 500hp if I have the right intake. I started with 351W's in 1987 and never being happy went through all sorts of combinations. The GT40P heads were something Ford was forced to spend the money on R&D to sell V8 Explorers. 02 intake valves, . The GT40 is a better flowing head than the E7. - so start with that. html and contact us for more information. cam in an explorer 5. The common upgrade to standard (non-HO) heads now on our boats are the GT40p heads, Looking to put together an inexpensive combo and wanted to see what kind of power people are making on GT40 heads????? Thanks Corral, Mike . I. 1965-up289/302 with 302/351W production heads, flat tappet cam, stamped steel and most roller rockers. 4:1, ported Vic Jr heads, TMoss ported GT40 lower, Deka 80# injectors, EDIS8, GUFB-A9L2-Moates tuned, Tremec 3550, 3. I used mild ported GT40 Iron heads on a blown gtconvert with a stock cam and 3. So the '69/'70 heads were far from unique. looking to add some extra power to your 5. oem heads , gt40, or p I was at the junkyard this weekend and found a good gt40 setup off a Here's my dillema I have a 351W out of a 94 Lightning on the stand right now. This motor used Aluminum Turbo Swirl heads, and a very stout cam, so yours will probably be somewhat less, with peak hP coming at a lower RPM. 0" Fox Mustangs of the 80s were legendary for being fun, fast, and making tons of tire smoke, but they only had 225 horsepower or so. 31 gears. The machine shop should know how much material to remove to raise the compression to 10:1. Have an 87 Coupe that I am getting ready to drop in a 351w. Ok so I'm looking to just gain some extra horspower and torque with my 351w in my Bronco. They have half sales like crazy and i can walk away with heads and intake for close to $150. The Mustang Cobra GT40 heads were milled to about 62cc. Intake was measured 185cc and exhaust 75cc (was sold as 195/85 ) The Hp peak is quite wide, from 4k-6k 290-310hp. intake, Holley 650 Double pumper, 1 5/8" long tube headers, Timing 16 initial 32 total. 351W, GT40 heads, cam help? dyno help. If you are more concerned about making max HP above 4000rpm, then go with the the GT40 parts and select a 270+ duration cam to compliment what If I were choosing a cam for a car with GT-40 heads I would probably go with the B-303 cam or just leave the stock cam in there with 1. OK, looks like my spring project will be replacing my 351 heads with GT40Ps. I think in your case, depending on your setup, it might limit you rather than allow you to make more. GT-40 aluminum heads, the 351W Its a non-roller block, 93 I think. 08/1. length is 6. I would opt for a set of GT40 heads like Tom suggested. 1966 Convertible (Plant: San Jose, CA) Only trouble I’ve ever had with it is the D9OE 351w heads they used for the ported “Windsor“ test, as they show stock D0OE heads for the stock 351w, then switch to the dog D9 Unless you have a deal on the GT40 heads, you must know there are so many better performing heads out there that will bolt right on the 351W. I will also take the heads to the machine shop for new valve guides and a valve job. There are lots of dynos out there showing that AFR 185s don't give up any low end to the 165s but gain alot on the top end . 5 in compression ratio. If you can avoid it i wouldnt go with GT40p on a 351. 050 wouldn't hurt your torque, but would pick up some power. Can they handle a stroked 393 or 408 stroker? or should I stay with 351W 60 over. One benefit gt40P head will have over other 80's-90's model heads, including the gt40 head, is that it has a smaller combustion chamber much like the original 289 heads. 0 gt-40 explorer motor now and thought about building the 76 351W motor in my garage and putting my heads on it. I need advice from you 351W guru's on what intake will I've run both variations. 8/351W) - anyone have experience with GT40P heads on a 92 351W - ive got a 92 F250 with a 351W that needs a pretty serious rebuild. With GT40 heads: 235 HP @ 4,600 RPM / 280 Lb. 6 roller rockers, edelbrock double roller timing set, new chromoly This is a 351W with non ported GT40 3 bar heads with a trick flow valve spring kit! I ended up going with the E303 cam, 1. The Ford small-block is a series of 90° overhead valve small-block V8 automobile engines manufactured by the Ford Motor Company from July 1961 to December 2000. I understand that it is said Hello, I'm going to be picking up a set of GT40P heads off an Explorer/Mountaineer very soon and I'm having difficulties finding if there is anything that will need to be done to the heads before they can be swapped For what you described, the long tube intake should be fine. 060 stock rods and crank flattop pistons gt40p heads lightly ported with stock valves updated springs for a retrofit hydraulic roller camshaft lift. You can put GT40 heads on it, but at minimum for good power the engine heeds about 225-250 intake flow at about 1/2 inch lift. Small Block V8 (221, 260, 289, 5. I would say their thinking leaned towards the way the heads flow improve hp and tq as compared How much horsepower does GT40 heads add? Essentially, you can port your E7TE heads, which will earn you about thirty horsepower, or you can upgrade to GT40 heads, which will also earn you about thirty horsepower. 5 inch to the tails With a tune that should make 400hp at the flywheel. MAC catback. 10 gears. Guess what, they lost HP& torque through out the entire RPM range, not once did they meet the P heads power! Small Block V8 (221, 260, 289, 5. Just depends how much hp your going for and if any other components are replaced with performance parts. find a 5. 650’ish lift 224 at . I'm set on stepping up to a 351W based motor. The chamber on '69 - '70 351w heads were known as the GT40 design. I'll have to figure out the thrilled body. They have some casting marks. Shocks '78: 429 BBF Sniper This is what I did but used much bigger and higher flowing parts than what you suggest. 905. Figure 3 Is the 69 Block with the 68 head and Figure 4 is the 96 block with GT40 head. 8L, Desolate Stage 1. The Ford 351 HO SVO made 385 HP at 5750 rpm and 377ft-lbs of tourqe at 4500 rpm. It had GT40x heads, and I want something that flows more. Holley 670 truck avenger Summit 1. GT40-P Heads on a 94 351W 1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks Community Links Small Block V8 (221, 260, 289, 5. 0. Obviously, Im shooting for great hp and torque while still maintaining driveability. I just bought a 95 GTS for 1k about a week ago and was wondering if I did a full GT-40 swap heads and intake what kind of realistic HP I could possibly see. 070” (60 to 70 thou). How much HP and torque do you think I The GT40 cylinder heads quickly gained a reputation as being “Yard Gold,” the type of thing that only enthusiasts knew to poke around for in a scrapyard. I strongly caution you to watch deck height and piston volume carefully, and pick the heads to have the correct chamber size. and 400 lb-ft of torque. 8/351W) - Gt40 heads on a 351W what needs to be done?? - I have a 351W out of a 78 couger and I found a set of gt40 heads out of an Explorer with 50,000 on the heads! What all needs to be done to fit my 351W I heard that you have to drill out the bolt holes but which ones and I will be taking the block to the machine shop and have it bored 0. Increase the lift to roughly 0. 0/302, 5. 8/351W) - GT40P heads in a 351w - This is a repeat of the same post that I put in the 351w fourm, just wanted a few more people to see it. I was wondering how much these heads would raise my compression and if anyone There were 3 types of GT40 heads 2 bars = Marine GT40. 302 intake/exhaust It should be noted that the 351 has larger head bolt holes than the 302. Cheaper than a full new HCI and way more power. 7 Cobra pedestal rocker arms E-303 camshaft (. I've seen only about 280 to the wheels so far Gt40 heads/intake from a jy explorer, leave the stock cam alone, upgrade the fuel system, brackets from superchargersonline and a low mileage s trim from the classifieds. 5:1) Compression ratio doesn't matter that much if you're only jumping up a point or so. They were all the same. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. All the goodies are out there, the only thing stopping you is common sense and your wallet The heads, after chamber blending and de-shrouding valves, have big volume. GT40 with 7/16 head bolt size (came on OE 302s) GT40p with 7/16 head bolt size (came on later OE 302s) GT40 with 1/2 head bolt size (came on Gen1 lightning and super rare Mustang Cobra Rs) Ford aftermarket GT40s with both size head bolts Only heads with a 1/2 head bolt hole will work on a 351w. 0/302. Member. I asked how much you can mill them safely, he said between. Not really looking for huge hp, just want better breathing engine. Its not to be confused with the carb and TBI versions of the HO 351w (which had GT40 heads), which were rated anywhere from 285 to "300+". People recommend the GT40s a lot for the 302, but not so much for the 351. You can find used TFS heads for a decent price and they will flow better then the GT40 heads. What was really interesting, they wanted to see how much more power they could make with Dart Sr. I was wondering if anyone else has done this swap and if they Small Block V8 (221, 260, 289, 5. Just built a 302 and it needs a set of The early 351W heads were unchanged from '69-'76 except for internal air passages added in '75. Anyway - couldnt find the casting number on current head - took valve cover off but just found something i cant lookup! its a 1974 351w. Part throttle response and torque were much better with the 750, after I dialed it in correctly. At the most, you might get 5 more HP with an aftermarket cam over stock cam. The company is Tri-state they want $598 for a pair that come with springs good up to a . IMO they are good for a MAX of 15-25 HP over the X303 heads. The gt heads came without rockers - so Will my current pedestal rockers and pushrods work with the gt40p heads? Cam is stock at this point and I REALLY dont have the $ for flashy springs etc. How Cylinder Heads Impact Performance Small Block V8 (221, 260, 289, 5. Ford calculated that with the LeMans cam, and 351W heads, a 302 would produce 355 hp. I'm now running a 393 stroker w/ 11. But I want 300HP right now. Material Type: Aluminum. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members) i'd love to use these heads, How about this 1983 351w bored. The GT40s have a slightly different looking outside on the end, so a eagle eye can spot them if looking for them. 90's @ 109 mph with a 1. it was not that hard to do. 10:1 true compression, old style 950 Holley HP based carburetor, Parker Funnel Web intake, Canfield 195 heads with 2. 54" won't cut it. There are 4 different types of GT40 head. 513/. You'll loose about 0. Well, sometimes I have been paid for it. 8) and accomodate my stock E6TE intake manifold + indmar exhaust manifolds and have valve clearance. 7 @130 mph - Pay attention to the different steam-hole port locations used in the gasket between the blocks. Granted, it can be done, but it takes a boatload of horsepower, and you need a really long extension cord! Bill Unless you really want the cleavand style heads their are some many really good aftermarket heads that work really good and don't require all the odd parts like manifolds, etc. That, along with a tune and gt40 heads, only added 30 HP to the 351w. Joined: Mar 25, 2005 low buck, gt40p 5. No need for 500HP. . They sprayed it and made 502 HP. Need to use 289/302 head gaskets and 351w intake gaskets (Felpro 1250s or 1262s work). In another unrelated test they ran on a 306 with an e-cam and made 365 FWHP. So GT40 heads and Lightning intake are a 30 hp gain. The long, gentle runners provide more torque than the slightly How much flywheel horsepower can a 1969 351W block handle? '89 5. To mill the 351W heads down to 54 cc chambers, about . 0l exp Check this out: https://www. Even though peak hp didn´t go up more than 10 hp, The track time, On BotniaRing was down from 1:34,45 ->1:30,27. Those will be a variant of the GT40 heads. 30 on radials , y303 aluminum on my 351 lightning (really woke things up over 3k rpm), and Dart Sr,s on both the It has a 351w EFI, 60mmTB, lighting GT40 tubular intake, perfromer rpm heads, X303 roller cam, full length headers, dual 2. One of the originals. The GT40P heads have the same intake valve as the other GT40 cylinder heads, but the smaller 1. Question: will gt40 or (p) heads fit on my 1987 indmar 351W (5. 69cc chambers. 8/351W) - mustang HO cam with GT40P heads - As the title states, I am getting ready to put a stock mustang 5. Anyone know if the engine performance and speed of boat would increase noticeably with GT40 heads and a nice aluminum intake? Hello all. I'd do a custom grind no matter what. Jump to Latest but I doubt it makes a difference in street cars below 6500 RPM's unless you want every last drop of HP. For $200, you are talking about $7/hp which isn't bad As previously mentioned, a simple valve job to go from iron seats to hardened seats (for unleaded) will likely cost Mustang would stand a chance. its capable of handling higher power outputs due to a much more rigid block. The GT40 heads are better than E7's but not buy a whole bunch. I plan to buy a cam kit that includes valve springs. Read I want some better than stock heads on my 351w build. My opinion is that 2/3 the money for 1/2 the power is not a good deal. 300 HP is fairly easy with GT40'sfor that matter even a set of mildly cleaned up early castings. 2:1 compression, Performer RPM intake, Trick flow heads and 750 Speed Demon carb. No reason it shouldn't. Late 70's on up they are basically the same as 302/5. O. GT40 Cylinder Heads. 0LHO with the GT40P heads on it. Let's start by reviewing the evolution of these heads. 89 LX procharged 302 515 hp 497 ftlbs 10. I'm looking for the right cam for a 351W Lightning engine w/ GT40 heads and Mustang MAF EEC setup. im wondering if the power gain would be worth the time and money of switch to gt40p heads? shut up before i punch you in the throat. hotroddon, Nov 26, 2008. The motor has GT40 heads on it (iron) and I have a GT40 intake in the garage. 0L The 69 and 70 heads, with the part number C9OE and D0OE had 60. 7's should give you almost identical HP numbers. Heads have also been shaved 0. 500, and the duration to 215 at 0. 8/351W) - GT40P heads? how hard to put on? how much HP and torque? - I have a 1989 f150 with a 302 5 spd. (94 roller) I'm looking to get new pistons (higher compression, maybe 9. '98 Explorer intake, port matched to heads. When only upgrading to the GT40 style heads, the stock cam with 1. There is a ton of information in this site: My Community - Index 1987 - 1996 F150 & Larger F-Series Trucks - 351W EFI GT40 head swap - So I have a 96 f250 4x4 5speed with a 351W. 90 and 1. AFR's, Edelbrock, Canfield, Brodix heads are much better choice and usually can retain stock intakes and exhausts. They were so strong that the Chevy guys bitched and moaned so much that the club changed the rules to allow a spec Edlebrock head for everyone. They wont produce as much power when you have 185cc heads and a big cam that needs lots more air. Switching to better flowing heads and a lighting/gt40 or aftemarket manifold will make a much bigger difference than the compression ratio will. Heads, cam and intake. 0l heads-cheap & effective. Here's the pagescroll to the bottom for the 310 dyno pullit's cropped a bit but the HP numbers are still there. The lightnings only made 240 bhp with those heads, so you're basically asking to make over 100 more horsepower with a cam swap, and you're even considering not using headers. 6 rockers. This is in an almost 4000 lb Mark VII with a 4R70W and 3. this cam pushed the peak horsepower to 6,400 rpm 8 Cylinder Engines - Gt40 heads on 351w - I'm looking to squeeze same extra hp and torque out of my 96 351w e4od transmission. I believe the GT-40s referred to here are the GT-40Ps and the 351w heads are either '69 or '70 C90E or D00E heads. HOW MUCH POWER IS A HEAD SWAP WORTH ON A 5. I'm not a big fan of the alphabet cams though Actually the GT40's are "probably" a better head than any of the normal production heads. the 351W is a considerably stronger block than the 5. They were made from the same molds Ford used to make the 69 & 70 351W heads. Ford touts the Cobra intake supporting 400hp. lbs. oem heads , gt40, or p heads are not that much different unless ported which work great on a 302. 4fords. 0L FORD? CAN I ADD 90 HP WITH THE RIGHT HEADS? HOW MUCH ARE EXPLORER GT40P HEADS WORTH ON A CAMMED 5. Craft, etc. OP. its not a ton of money - lec ignition kit, maybe 70 bucks, iron 4 barrel intake, 50 at a swap meet / local. 0 H. 0 heads 351W Swap Parts; 7. Stock rods. GT40 iron heads, lightly ported. Just wondering what to expect with Early 351W heads were known as GT40 heads and the GT40 was referring to the improved chamber design. 0 be better than the stock 351 heads since it's not going to be a rev monster?? Will i feel much of a difference if i had my 351W bored . The heads were initially designed for a 221ci engine, and weren't really changed all that much as the engine grew to 260, 289, 302 and 351ci. My 351w is a 1974 with stock heads and pistons. Stock valves. I can get the 351w's ported to 1. But I have no experience with Solid's. I'm not sure what the different boat engines came with for heads, but mustangs (302W and 351W use the same heads) came with 1. 3 bars = GT40 4 bars = GT40P When I measured these ones, they measure 63cc. I used 96 F250 pushrods and the correct 96 Explorer spark plug (they want the expensive ones) IIRC the rocker arm torque was in ft. Cuz GT40 isn't worth much HP over stock. We specialize in Chevrolet and Ford, and will guarantee every I found a set of GT40 heads in the mustang mag the othere day. I am installing a set of e street 5023 heads, weiland stealth manifold and 1. The block is ready for a roller cam, so that's not a problem. Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1. 95 Cobra- Sold! 02 Z06 - H/C/I/E- 460 to the tire. 8/351W) - GT-40 heads for 351w - I was wondering what type of vehicles i could find gt-40 heads for my 351w ho. im running a 5. alot of peopel go the cheaper route and either get GT40 heads and do porting and gain enough I have a 4 speed. Which head is best for you would be a question of how you intend to drive the vehicle. i currently have 351W (dooe cast) heads. The GT40 head swap project is meant to be an afternoon midway swap that allows me to enjoy a bit more horsepower while still driving the car before Looking to get better heads for my 92 bronc nite and I have heard a lot of people talk about putting gt40 head off a 96 or older explorer on the 351w efi. Ran 12. Again, you are asking very generic questions that cant be answered correctly without more info. Upgrading Fox Body Mustangs to GT40 heads became a popular modification. 60 is a good starting point. 84 and 1. They were the smallest chambers on the 351W heads, and had the biggest ports/valves although they were still asthmatic. 2L Blowzilla Dart Iron Eagle 306 @ 8. In the end, the 165 heads and GT40 intake will limit what you can get out of it. that block used 7/16" head bolts and the 351W used 1/2" head bolts. The edelbrock unit has large rectangular runners, and smoother radii in the lower. cam has a little better grind when combined with the 1. 4 cc. It will have a pretty flat torque curve and with proper machining and balancing, it should spin to around 6800 revs pretty easily. in the 351 heads and '96 Explorer GT40 heads are 65cc. I would email Trick Flow tech and see what they say about how much HP the 351W intake will support. OP . These things need to breathe, and 1. A good set of high flow emissions compliant AFR heads will add close to 100 hp with a mass air conversion and a proper tuner or aftermarket EFI TBI setup. They have milled previously. It puts out 292 hp and 342 tq now and runs and drives like a stock car. 351w heads (early ones) were GT40 heads. Let's say that the 351w bottom end/heads can support 500hp, but I leave the 19# injectors and original MAF on the first go around, then I Small Block V8 (221, 260, 289, 5. If you get a nice set of heads and a better cam it will hold the engine back above 5,000. 0055 per cc. 94"/1. I'm picking up a set of GT-40 iron heads this weekend. I don't know the cam specs on the Lightning stock cam. 0 rather than the old 351W heads which will lower your compression ratio and also use a larger head bolt that you will need these for Trick Flow Specialties TFS-51400419 Trick Flow® Head Bolt Bushings | Summit Racing. Save Share I'm running a tubular GT40 on top of a 347 with massaged AFR 165s and an XE266HR cam. There's a GT40 head, and a GT40p. I once milled down some GT40 heads so much The 351w heads use 1/2" head bolts vs the 302 which uses slightly smaller 7/16" bolts. 8 would have them. Edelbrock's Performer RPM package (heads,cam,intake) will give you 410 h. The GT40 first appeared in '93 and can be found on Mustang Cobras and Lightning pickups. Or for $1100, you could make 50hp more. 0020. That said, if your 289 stays a 289, i would use the 289 heads. Here's the stock roller cam specs if you didn't have them: F4TE roller cam, '94+ truck and Explorer 256/266 adv duration E7TEs breathe much better. In case you are wondering, the 351W head, slightly modified, became the GT40 head. Here a comparison of different heads on a 302: +30 HP compared to the stock heads. 9 sec Most aftermarket aluminum heads (Holley, Edelbrock, etc)= 220-230cfm TFS and AFR 165 = 250cfm Race heads = 260-280cfm Stock intake = 135cfm Explorer intake = 190cfm Cobra/GT40 intake = 200cfm The big flow aftermarket aluminum heads won't give you any hp over the GT40P heads if you don't have the rest of the setup to use them. 0L LX hatch: all 90mm 2. Gt40 heads have WAY to large of Combustion Chambers 68cc's vs the 351w's 60cc's. What cam would work best with these heads and the other parts in my sig. 0l or 351w? look no further than your local junkyard. The heads also have 1. 480 Duration: 258*/264* i CAN"T afford alum heads for the 351w, will/would the GT40 heads i just put on the 5. ARP sells special reducing washers to fill the gap and to keep the bolts in line. I have some gt40p heads that I was going to enlarge the head bolt holes so they would fit a 351w. Keep in mind that the bolt holes on a 351 head are larger than a 302, so if you get heads from a 302 those holes will need to be enlarged. Other than casting numbers and dates, it would be hard to tell them apart from the older ones. Okay so sounds like 'E7' or GT40 heads. On the left is our 1. What I was wondering are they just drop on or is there milling that has to be done? '92: 400+ HP EFI 351W, C6 Swap '96: 5. Small this it the combo im thinking of building for my 86. How much better or not does the Edelbrock Performer intake flow compared to the GT40? Im building a 351W for low end torque and need a point of reference to compare these I did this on my build - 96' 351W with 96' GT40 heads. Figure 3 Figure 4 Next I will overlay the putting the GT40 heads (non P's) headers maybe a cam swap. Looking into adding ported and polished gt40 heads with comp cams 35-512-8 camshaft and a few other new things. The heads had weak springs at the time those numbers were made so i think it was capable of a bit more. com/Ford-04. Right now it is just a Trickflow stage I cam, Lightning GT40 heads, FRPP 1. You need intake to take better advantage of it and even then it's not a whole lot. Save Share 89 LX procharged 302 515 hp 497 ftlbs 10. 73 gears Brought the car to the drag strip last night. The build is "parts I have laying around". Jan 18, 2002 #7 DRB GT40/0035 Cobalt Blue Metallic 351W/400+HP/G50 750 Edelbrock . 20 over pistons and rings, new oil pump and machined crank and new set of bearings. The 351 GT40 SVO motor used cast iron GT40 heads and a cam fairly close to the Edelbrock RPM. 3L Godzilla Swap; Air Intake; Alternators; or 4 bar (GT40P) stamped on the side of the head. so how much HP can be gained by doing this? just got my second toy (1972 mach 1) and i have the spare 302 that came of my coupe, the mach 1 came without engine but in the I know the GT40 is an old design. cam with cobra roller rockers is a great combo with GT40 heads. The GT40 heads may add something to a more or less stock 302, but when you start approaching 400 ci, the equation changes. most aftermarket head has 60cc chamber. All of that and stroking with the compression to the low 10s will get you 100+ more hp. Here is what I have: My pickup; 1995 f150 302, MAF, stock aside from longtube headers, and 1. How much hp should i expect to gain? And how hard is the process is it a direct bolt on, or is there some modifications to do the swap? The GT40 heads will add a little bit to the 351, but dont use an F-cam. 6RR and edelbrock PERFORMER RPM 351W EFI INTAKE . heads were stock iron with larger valves, and a pretty agressive cam. Don't be afraid of getting "big" heads. 0 with gt40p heads. You can certainly do it, but it will be very expensive. p. The combustion chambers are 60. Whether you have a 302, 351 Windsor, or other compatible engines, there's likely a set of GT40 Heads that will fit and work seamlessly with your setup. Generally the 96-97 Explorers had GT40 and the later engines got the GT40P heads. 0 intake and the 002 cam, you will make around 425 hp and about 385 on torque. The HP per-dollar is better with other well-established heads. It is very easy to tell them apart. running a nice streetcar friendly hyd roller The C9OE and D0OE ('69-'70 351w)castings have much smaller chambers and bigger valves and were the hot ticket back in the days before aftermarket heads (like the C5-C6 289 heads with 54cc chambers). On Explorers there are GT40 AND GT40P heads. The H. Save Share The efficiency of long-tube headers over shorty headers is demonstrated on the dyno with 16 more HP and 16 lb-ft of torque on a mild 351W Ford small-block. im running rpm heads on a 69 351w after using ported 69 351w heads and the difference is like night and day,IMO theyre a good street head,but there are alot better heads out there of course , im happy with the The Performer RPM intake is a much better piece for hp. Traditions Racing, Jun 9, 2011 Art's point is, with those stock heads of a 351w, you're not going to achieve your 385 with those itty bitty ports of the 351w. They will however limit hp production above 5,000 rpm. _____ Many GT40's have 351W based engines. Sent from my iPhone using Tapatalk . A better choice would have been the GT40 heads from a later 5. Its a non-roller block, 93 I think. Ideally you want to find something that has F#ZE on them. This MAY work out fine in your truck, but you have to make the call whether the $ for aftermarket heads are worth the considerable extra hp they will provide (especially at higher rpm). 529 lift at valve) MAC longtubes, 3" collector. No port work of any If you get the GT40 heads make sure they are the "P" version or cast iron and not the aluminum GT40 heads. (maybe 350rwhp with good heads) in the HP/TQ department but you always have to look at the heads first and go from there. They even let The GT40 Cylinder Heads can be engineered to fit a variety of Ford V8 engines due to their versatility and compatibility. 033 has to be removedworks out to . I've looked at flow numbers and the 40's flow slightly better than the Heads i'm looking to get. Your heads and cam will play a large part in determining that. plus, it can take stroker a 351W would recomend like 170cc ish aluminum heads. 54 valves. Depending on the Block, you can get a 351W roller ready block It made 244 hp and 282 tq. at the crank. Jimmy -Go Gators! '94 Cobra w/complete R Drivetrain - cylinder heads Hyper, the GT40 heads are excellent. Afr 185s are far from big on a 351w. My car is completely stock and I see a lot of gt40 explorers in my local junkyards. Some people drill the steam holes in the 351w heads, but it's not a necessity. and headers. Then it got: New edelbrock performer aluminum heads, camshaft and intake. id say go on ebay and get a set of gt40 heads, not gt40p heads, get a simlpe cam, like say call up a cam manufacturer and ask them which would be proper for you engine and needs, the stock air newer GT40 heads are basically 351W spec heads with bolt down rockers. Good street head. Found a set of GT40 and 40p heads in a local junk yard, which one would be better then the stock heads. 1. If I go GT40 or(40p) heads, keep the non roller cam/lifters or do the retro fit to the roller rockers The GT40/p heads will make a big difference in power and will help with fuel economy. They work well for the stock motors but if you are planing on adding a cam then there are better choices for heads and the GT40's would not be my The GT40 looks cool though. Ian K. Keep me honest here. 8/351W) - 302 Gt-40 Heads Horsepower - How much more horsepower will I gain with gt-40p or gt-40 heads, compared to the stock heads, on a 1982 f150 302? Installing GT-40P Heads: Iron Head Horsepower. The GT40 is What's a decent flywheel horsepower/torque number to be expected from this Found a set of GT40 and 40p heads in a local junk yard, which one would be a 351W would recomend like 170cc ish aluminum heads. 3" into cats, 2 1/2" after them. 9 intake heads w/3k miles for $600 (unusually good deal) - an equivalent flowing head would be the GT40P's - check headfixers in SE Indiana - they offer them on ebay with larger SS valves, good guides springs & seals, and can drill for smog, quite reasonably. TFS, Ede, and AFR with 2. This means the same heads will fit, but a 302 head will need to be drilled out to accommodate this if it’s being used on a 351. A completely un-touched 302 in the car. . TQ @ 4,000 RPM Comp Cams XE258HR: Lift: . What Mustang's had GT40 heads? Just curious, since the Mustang 5. The venerable "5. The GT40 is for highest horsepower, the GT40p would make better torque and SCCA American Sedan 306 Fords make 400+ HP using GT40/GT40P heads. 62@108mph w/ 9inch rear end, 4. Which I like on track. Take the heads down to the shop and have em planed down a touch to bring the compression up to about 9. You won't get 350 hp from a 302 with any stock Windsor heads from any year. 7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. SHARE POST #5. I correct myself, I just read the Ps didn't come along until 1997 and your heads are coming out of a 96 Explorer. In a '66 Mustang chassis the only problem is there is no way to keep the rears from going up in smoke when rear wheel hp gets over 425 My throttle response got great when I went with a 750, although I gave back 30 peak hp. Steeda Underdrive pullies (waterpump+crank) Smog pump delete BBK Adjustable FPR 250 you can rebuilt you head with bigger valve and mild porting job, they are going to be better than the gt40. or some earlier C90E or D00E 351W heads. Reply Like # The AFR 165 heads would be a step up from GT40 heads, but you could up the size of the cam significantly without hurting the torque output. 030 over and deck the block. Designed as a successor to the Ford Y-block engine, it was first Using the Victor Jr heads and victor 5. 54" valve and 60 cc chamber. The difference in HP/Weight is too much in favor of the 40. Not too many Hondas making an honest 600 horsepower can catch them. 7 rockers, Victor Jr. Joined Feb 5, I replaced the GT40 heads with GT40p's, also dropped a cam (small lift/495), roller lifters, rockers and flat top pistons in it. Also there were no 4bbl heads. Even stock GT40 cylinder heads on a stroked 351w will allow for tons of torque. 7 ratio cobra rockers giving you more hp/tq than the cobra cam setup. I believe the GT40 heads are 65cc. 50 /each. Edelbrock | #32577319. But not right now. On the GT40 heads, the X are aluminum, P are's explorer/mountaineer v8 and requires unique headers. 5:1, '69 351W and ran a best of 12. I have no idea how much HP it makes and don't really care, I do know that it is fun to drive. 480/. Finish: Natural. 8/351W) - 351w marine what to expect with head change? - I have a 351w marine engine, I didn?t realize it had gt40 heads until I got them off yesterday. this is with the better intake manifold than the stock class as well as the larger 145cc style 351W/GT40 style port. 7 crane rr. The heads have a very efficient chamber that requires less timing. 1987 - 1996 F150 & Larger F-Series Trucks - 351W Head, Intake, & HP questions - I am preparing to start a 351w build to put in my pickup. Tmoss ported 351 gt40 Intake (flow just as much as the heads) $300ish Anderson N41 cam- $300 new or 150 used 70mm Throttle body 70mm+ MAF Powerpipe Full exhaust, 1 5/ headers and 2. GT40 heads can be found pretty much anywhere you look. 7 @130 mph - sold it. I was looking at putting on the GT40P heads on. 4 cc chambers. I ran this setup on my 9. SDlivin Sr. I have a set of race prepped Gurney heads and I'd sure like to use them on a 351+ and pass the Support GT40s. 846-inch GT40 intake valve, which is the same intake valve as is used on the 351 Windsor. The GT40 is a high performance part. HRM several yrs ago made 500 hp with the 460, as well as the 454 chevy and 440 chrysler. Did some research using our awesome search function. 84", 1. Are GT-40P heads for real, or just iron door stops? HOT ROD Staff Writer Dec 12, 2000. I recently pulled the motor to replace all the seals. heads on, in place of the P heads. I posted this thread in classic but havent had any responses. 5" exhaust. 5 Lift, FOX Res. $ barrel carb 50 bucks give or take. Then the intake would have to be milled. 6 roller rockers which is what I would recomend for anyone who wants an easy 25-30 HP's out of their current setup. GT40 Mk111 351w soon to be ZF DS25/2 trans . 65mm Explorer throttlebody 1. So upgrading to even the affordable alpha cams, would probably be a waste of money. If I go GT40 or(40p) heads, keep the non roller cam/lifters or do the retro fit to the roller rockers I have a 351W 250 hp with 650 hours on her. i built one of their fords and it was not that expensive. stroker engines with a 351W block. Want too know if the heads just bolt on and if my stock intake and headmen The "GT40" was the multiport EFI PCM HO 351w and was always rated at 310hp (it was available 95-02). with different valvetrain. 5 ratio stamped rockers. Edelbrock 60225 Performer RPM Cylinder Head, Ford 289, 302, 351W (1) Cylinder Head Style: Assembled. Stock H. they So much so, that I am working on a 302 roller motor to get it ready to replace the 289 (that has less than 2,000 miles), which will have all the goodies like Twisted Wedge heads and a bigger cam. TFS stage 1, Lunati 51014, E cam, Crane 2031 which one guy's or is there a better cam than these out there. Ill try stick my head round the back today and get some casting numbers on the heads - apparently some marine 351w's came with gt40 heads. It will support plenty of power. Also keep in mind that the GT40 heads are not the best heads available for the 351W engine. This has a 5sp with 3. 060 - 0. 0L came with E7 heads. 513 with the retrofit roller lifters performer 2dual plane intake 650holly and long tube headers hp and torque guess please I bought a crate 302 from Downs Ford a few years ago that was producing 320 hp. -Ft. Add to Cart-9%. 46-inch exhaust valve found on the standard E7 heads, but makes up for it with a little more compression, thanks to the smaller 59cc chamber. A few years ago in Hot Rod they built a carbed 351 with 'P' heads that made 385 69 351W HEAD Intake 181 Exhaust 114 GT40 HEAD Intake 192 Exhaust 128 GT40P HEAD Intake 196 Exhaust 139 remember that the P head has a slightly different exhaust flange shape and headers must state they fit the P head to work. Especially the GT40P's-which IIRC came on explorers, but had 7/16" head bolt holes rather than 1/2" (351 uses 1/2" 302 is 7/16"). These heads will also be marked with a GT40 on top. Really the only good stock 351W heads are early to mid 70's that have the larger valves. Fitting the thicker head gasket increases the squish distance @ TDC [Piston to head at closest points ] this will actually degrade the combustion process further . /spôrk/ a spoon It's the stock heads and intake that can't perform. A well matched combination will turn it into a rocket on the street. $1,009. 69-73 351w head has 1. I was just considering a top end upgrade. No mods required to use the heads on a 289/302. The legacy of GT40 Cylinder Heads adds to their enduring popularity. Most of the Superformance ones use Roush, K. So far besides the gasket kit, Vic Wagon with a set of gt40p's and explorer intake set and few other things bring it up higher then the stock 152 hp ya know . Donor vehicle; 1995 f150 351w SD, everything stock as far as I can tell. 40 over? Im trying to figure out what i want to do. exactly why I have pushed GT40 heads as basically an early 351W head . 55 gears ,12. IIRC, the only mods to the heads were stainless steel valves and a good valve job. GT40 & GT40P Head Specs; Head Type Intake Port Are you talking stock form? I would be surprised there would be much of a difference between the two after porting. That's why I was wondering about the GT40 heads vs afr heads. Although 33's and a 3. I know the head bolts are different (1/2 inch for 351). The regular GT40s had 3 bars/lines on the front of the heads and the P heads had 4 bars/lines. 050 lift duration intake lobe cam, full length headers into 3” dual exhaust. My crappy ass 302 makes about 340-350hp at the flywheel. How much hp would I gain from a gt40 top end 88 mustang gt I was think about buying a set of gt40 heads and upper and lower intake from a guy parting out a 99 5. you can shave the gt40 head but i dont think you can them that much to keep your comp ratio. The GT40p is based on the GT40 but it's more for everyday driving. THe P's also flow more than than the std gt40 and comes with better combustion chamber and ideal plug placement for reduce emissions. Even they are debateable as pre 74 heads dont have hardened exhuast seats. 550 lift which is good for my cam. 351W head volume is 61 cc vs 289's 54 cc. 7 roller rockers. Either one (earlier or GT40) have good flow numbers and have better combustion chamber design than the mid to late 70's [censored]. The lower was ported by Tom Moss to match the heads (a long time ago). 55 rear is not ideal it will still be fine for towing all except the heaviest of loads. 350 HP from a 351w. Amateur restorer. 31 gears w/31-spline TruTrac Shop Ford GT40 Cylinder Heads and get Free Shipping on orders over $149 at Speedway Motors, the Racing and Rodding Specialists. Production heads like the GT40's and GT40P's . and But in general how much hp can u squeeze out of gt 40 heads. uwasm rhrglx usrw mqpp ougqu ayszdg cdddmgf sxm emuoj orli