Gt40 heads on 351w how much hp. or 4 bar (GT40P) stamped on the side of the head.

Gt40 heads on 351w how much hp. I recently pulled the motor to replace all the seals.

• Gt40 heads on 351w how much hp 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. heads were stock iron with larger valves, and a pretty agressive cam. Edelbrock | #3255028. Figure 3 Figure 4 Next I will overlay the GT40 head onto the 69 302 block, where I intend to install it. If you knew all that much about engines (I don't either) you'd know there isn't a cheap way to horsepower. But I want 300HP right now. Switching to better flowing heads and a lighting/gt40 or aftemarket manifold will make a much bigger difference than the compression ratio will. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. GT40 heads from explorers have the larger chambers, with the Cobra 'Stangs with the smaller chambers. 351 HO is around 285--290 hp. 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. A completely un-touched 302 in the car. 050 and . But I have no experience with Solid's. Add to Cart. oem heads , gt40, or p heads are not that much different unless ported which work great on a 302. 8/351W) - GT-40 heads for 351w - I was wondering what type of vehicles i could find gt-40 heads for my 351w ho. 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 That, along with a tune and gt40 heads, only added 30 HP to the 351w. 1987 - 1996 F150 & Larger F-Series Trucks - 95 Bronco 351W build - Hello all I need a little help in ensuring I have everything I need to get the most out of this build with what I have in hand. 7 crane rr. We specialize in Chevrolet and Ford, and will guarantee every Small Block V8 (221, 260, 289, 5. 02 intake The Performer RPM intake is a much better piece for hp. Joined Feb 5, 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 E7TEs breathe much better. The bottom end will be a stock rebuild . There is a ton of information in this site: My Community - Index I started with 351W's in 1987 and never being happy went through all sorts of combinations. You need intake to take better advantage of it and even then it's not a whole lot. Just depends how much hp your going for and if any other components are replaced with performance parts. Are you rebuilding the whole engine ? Even with the factory heads, that thing had grunt! Back in the days before aluminum heads, many people installed 351W heads on 302s and they worked pretty well. with different valvetrain. Post Standard 351W + GT40 EFI + GT40 ignition + GT40 heads + GT40 cam + GT40 lifters = GT40 zero power lost Comment. 0LHO with the GT40P heads on it. The heads, after chamber blending and de-shrouding valves, have big volume. 480 Duration: 258*/264* i CAN"T afford alum heads for the 351w, will/would the GT40 heads i just put on the 5. Ideally you want to find something that has F#ZE on them. The GT40 heads you are considering have the same port size as what you have now. GT40 Cylinder Heads. . 0 There were 3 types of GT40 heads 2 bars = Marine GT40. I got a set of gt40 heads that I plan to use. I was just considering a top end upgrade. 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. I've run both variations. 10:1 true compression, old style 950 Holley HP based carburetor, Parker Funnel Web intake, Canfield 195 heads with 2. length is 6. Even stock GT40 cylinder heads on a stroked 351w will allow for tons of torque. 4fords. My 351w is a 1974 with stock heads and pistons. Anyway - couldnt find the casting number on current head - took valve cover off but just found something i cant lookup! its a 1974 351w. 0L came with E7 heads. plus, it can take stroker I ported a set of '70 351w heads and wrote a post on the home porting forum on this site. With a Exhaust, cam, intake, gt40p heads, should push you to a little more horsepower. HRM several yrs ago made 500 hp with the 460, as well as the 454 chevy and 440 chrysler. 0 explorer and adding a e303 cam also. How much HP and torque do you think I It made 244 hp and 282 tq. How Cylinder Heads Impact Performance I bought a crate 302 from Downs Ford a few years ago that was producing 320 hp. Joined Feb 5, A 351W based engine with alu heads weighs nore more then a 302 based engine with iron heads. A few years ago in Hot Rod they built a carbed 351 with 'P' heads that made 385 Small Block V8 (221, 260, 289, 5. Again, you are asking very generic questions that cant be answered correctly without more info. 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. What was really interesting, they wanted to see how much more power they could make with Dart Sr. It has a 351w EFI, 60mmTB, lighting GT40 tubular intake, perfromer rpm heads, X303 roller cam, full length headers, dual 2. 1965-up289/302 with 302/351W production heads, flat tappet cam, stamped steel and most roller rockers. These things need to breathe, and 1. I was wondering how much these heads would raise my compression and if anyone HOW MUCH POWER IS A HEAD SWAP WORTH ON A 5. 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. 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 I found a set of GT40 heads in the mustang mag the othere day. you can shave the gt40 head but i dont think you can them that much to keep your comp ratio. or some earlier C90E or D00E 351W heads. 2001SAN. Traditions Racing, Jun 9, 2011 Ford calculated that with the LeMans cam, and 351W heads, a 302 would produce 355 hp. The company is Tri-state they want $598 for a pair that come with springs good up to a . 6 cram cams roller rockers, Edelbrock Performer upper 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. 0/302, 5. Comment. 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. heads on, in place of the P heads. 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 they are a bolt on deal, and an excellent budget head for the 289. This has a 5sp with 3. SDlivin Sr. Hot rod made 390 hp and 405 lbs of torque on a 351 with gt40 heads. 8) and accomodate my stock E6TE intake manifold + indmar exhaust manifolds and have valve clearance. I would email Trick Flow tech and see what they say about how much HP the 351W intake will support. '98 Explorer intake, port matched to heads. 550 lift which is good for my cam. Its a non-roller block, 93 I think. If I go GT40 or(40p) heads, keep the non roller cam/lifters or do the retro fit to the roller rockers 351W Swap Parts; 7. 60 is a good starting point. 7 Cobra pedestal rocker arms E-303 camshaft (. 6 roller rockers which is what I would recomend for anyone who wants an easy 25-30 HP's out of their current setup. Take the heads down to the shop and have em planed down a touch to bring the compression up to about 9. To mill the 351W heads down to 54 cc chambers, about . 7 roller rockers. I was hoping for better agreement between Dyno 2000 and the test data. I need advice from you 351W guru's on what intake will be best for throttle responce, holding power/torque, and perform best at 2,500-3,500 RPMs. Also keep in mind that the GT40 heads are not the best heads available for the 351W engine. 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 Using the Victor Jr heads and victor 5. But not right now. Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1. all that on a 351w with forged rotating assembly will make alot of hp/tq for little money and be fun to drive. 55 gears ,12. Late 70's on up they are basically the same as 302/5. i built one of their fords and it was not that expensive. Reply Like # The heads also have 1. 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. looking to add some extra power to your 5. 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. 84 and 1. 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. 9 sec The GT40 looks cool though. I dont believe there are any differences between the long blocks on any of the HO versions- be it carb, TBI or multiport (GT40). alot of peopel go the cheaper route and either get GT40 heads and do porting and gain enough 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. hotroddon, Nov 26, 2008. 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 351W, GT40 heads, cam help? dyno help. I strongly caution you to watch deck height and piston volume carefully, and pick the heads to have the correct chamber size. SCCA American Sedan 306 Fords make 400+ HP using GT40/GT40P heads. 070” (60 to 70 thou). 500, and the duration to 215 at 0. 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. 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. 905. Here's my dillema I have a 351W out of a 94 Lightning on the stand right now. but for 1199. The GT40/p heads will make a big difference in power and will help with fuel economy. It puts out 292 hp and 342 tq now and runs and drives like a stock car. 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. 0020. No port work of any Check this out: https://www. In another unrelated test they ran on a 306 with an e-cam and made 365 FWHP. 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. They were the smallest chambers on the 351W heads, and had the biggest ports/valves although they were still asthmatic. Found a set of GT40 and 40p heads in a local junk yard, which one would be better then the stock heads. I currently am about to pull my engine for rebuild (1988 F150, 4x4 BW1356, C6 Trans, 351W EFI). E7). 4 cc chambers. The 351w heads use 1/2" head bolts vs the 302 which uses slightly smaller 7/16" bolts. The main difference between the HO and non-HO motors were the heads (GT40 vs. most aftermarket head has 60cc chamber. Really the only good stock 351W heads are early to mid 70's that have the larger valves. im running a 5. its not a ton of money - lec ignition kit, maybe 70 bucks, iron 4 barrel intake, 50 at a swap meet / local. I have a 5. They will however limit hp production above 5,000 rpm. OP . It won't be cheap. 0l exp putting the GT40 heads (non P's) headers maybe a cam swap. SHARE POST #5. Here is what I have: If you have any questions about either let me know. 8L, Desolate Stage 1. 2:1 compression, Performer RPM intake, Trick flow heads and 750 Speed Demon carb. GT40 & GT40P Head Specs; Head Type Intake Port low buck, gt40p 5. 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. If you get the GT40 heads make sure they are the "P" version or cast iron and not the aluminum GT40 heads. I asked how much you can mill them safely, he said between. The heads have a very efficient chamber that requires less timing. Those will be a variant of the GT40 heads. Cuz GT40 isn't worth much HP over stock. 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. 0. Holley 670 truck avenger Summit 1. 0l heads-cheap & effective. Often, these can be more $$ than they are worth, and considering that there are a lot of excellent aftermarket heads out there . OP. Granted, it can be done, but it takes a boatload of horsepower, and you need a really long extension cord! Bill Small Block V8 (221, 260, 289, 5. Mustang would stand a chance. 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? 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. 350 HP from a 351w. you can rebuilt you head with bigger valve and mild porting job, they are going to be better than the gt40. All the goodies are out there, the only thing stopping you is common sense and your wallet There are 4 different types of GT40 head. Intake choices #1 stock truck 351W lower with car (Preferably 87-93 Mustang upper) (NOT GT40, Cobra or Explorer upper) 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. The long, gentle runners provide more torque than the slightly Shop Ford GT40 Cylinder Heads and get Free Shipping on orders over $149 at Speedway Motors, the Racing and Rodding Specialists. I think you're compression I'm looking for the right cam for a 351W Lightning engine w/ GT40 heads and a 351W would recomend like 170cc ish aluminum heads. 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 cylinder heads Hyper, the GT40 heads are excellent. Join Date: Apr 2012; Posts: 203; City #1 don't forget the Explorer 302 heads need the head bolt holes drilled larger for the 351W block. They flow much better than hipo 289 heads, which flow exactly the same as standard 289 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. Especially in an old truck 351, I wouldn't bother and would just save the couple grand and put it in something built to go fast. 69-73 351w head has 1. i would recomend useing a performer rpm intake with a 500-600cfm carb. 480/. What cam would work best with these heads and the other parts in my sig. You could make 25hp more with those. 846-inch GT40 intake valve, which is the same intake valve as is used on the 351 Windsor. I would opt for a set of GT40 heads like Tom suggested. The HP per-dollar is better with other well-established heads. 7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. Intake was measured 185cc and exhaust 75cc (was sold as 195/85 ) The Hp peak is quite wide, from 4k-6k 290-310hp. No reason it shouldn't. . 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 . 0l or 351w? look no further than your local junkyard. It is very easy to tell them apart. The Mustang Cobra GT40 heads were milled to about 62cc. It should be noted that the 351 has larger head bolt holes than the 302. 3L Godzilla Swap; Air Intake; Alternators; or 4 bar (GT40P) stamped on the side of the head. Guess what, they lost HP& torque through out the entire RPM range, not once did they meet the P heads power! The GT40P heads have the same intake valve as the other GT40 cylinder heads, but the smaller 1. The GT40 heads will have about 64cc or low 60's cc chambers. - so start with that. They have some casting marks. 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. 300 HP is fairly easy with GT40'sfor that matter even a set of mildly cleaned up early castings. 5 ratio stamped rockers. Heads have also been shaved 0. 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 The GT40 Cylinder Heads can be engineered to fit a variety of Ford V8 engines due to their versatility and compatibility. 050 wouldn't hurt your torque, but would pick up some power. If you can avoid it i wouldnt go with GT40p on a 351. I'm picking up a set of GT-40 iron heads this weekend. Even they are debateable as pre 74 heads dont have hardened exhuast seats. the edelbrock is a good one to use, as is the road demon jr. 5:1) I have received the dyno data from Keith Craft concerning the Dart 351W stroker motor (details at website listed below). All horsepower differences (285-310hp) were due to induction and ignition systems along with some marketing, perhaps. Although 33's and a 3. These heads have kind of taken a back seat to the latest SBF heads that have been released. I did this on my build - 96' 351W with 96' GT40 heads. The 69 and 70 heads, with the part number C9OE and D0OE had 60. GT40 heads can be found pretty much anywhere you look. com/Ford-04. For $200, you are talking about $7/hp which isn't On Explorers there are GT40 AND GT40P heads. Shocks '78: 429 BBF Sniper But in general how much hp can u squeeze out of gt 40 heads. 5:1) Advanced Search Cancel Create thread New Forums More Login / Join Question: will gt40 or (p) heads fit on my 1987 indmar 351W (5. 351W head volume is 61 cc vs 289's 54 cc. The motor has GT40 heads on it (iron) and I have a GT40 intake in the garage. Did some research using our awesome search function. I'm now running a 393 stroker w/ 11. 0z (Zbox), Acme #422, Tunable Rudder. Ok so I'm looking to just gain some extra horspower and torque with my 351w in my Bronco. Okay so sounds like 'E7' or GT40 heads. I once milled down some GT40 heads so much I know the GT40 is an old design. The lightnings only made 240 bhp with those heads, so you're I want some better than stock heads on my 351w build. 62@108mph w/ 9inch rear end, 4. The heads had weak springs at the time those numbers were made so i think it was capable of a bit more. A popular example of this is the 1987 - 1996 F150 & Larger F-Series Trucks - 351W EFI GT40 head swap - So I have a 96 f250 4x4 5speed with a 351W. at the crank. Actually the GT40's are "probably" a better head than any of the normal production heads. The GT40s have a slightly different looking outside on the end, so a eagle eye can spot them if looking for them. The GT40 is a better flowing head than the E7. The legacy of GT40 Cylinder Heads adds to their enduring popularity. 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. $1,009. /spôrk/ a spoon AFR heads reported 75 more HP with just a head swap to the 165's- stock everything else. Keep me honest here. 302 intake/exhaust 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. Well, sometimes I have been paid for it. Want too know if the heads just bolt on and if my stock intake and headmen I did this on my build - 96' 351W with 96' GT40 heads. If I go GT40 Small Block V8 (221, 260, 289, 5. I started with 351W's in 1987 and never being happy went through all sorts of combinations. 65mm Explorer throttlebody 1. Although the D0OE 351W heads are 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. 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. 0L The GT40 heads will add a little bit to the 351, but dont use an F-cam. its capable of handling higher power outputs due to a much more rigid block. 69cc chambers. 5:1, '69 351W and ran a best of 12. p. lbs. TFS, Ede, and AFR with 2. 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 They sprayed it and made 502 HP. One of the originals. Looking into adding ported and polished gt40 heads with comp cams 35-512-8 camshaft and a few other new things. ive also heard that you can lose power porting unless you do it right. -Ft. 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. it was not that hard to do. They wont produce as much power when you have 185cc heads and a big cam that needs lots more air. THe P's also flow more than than the std gt40 and comes with better combustion chamber and ideal plug placement for reduce emissions. I recently pulled the motor to replace all the seals. In the end, the 165 heads and GT40 intake will limit what you can get out of it. _____ If you want an OEM Ford hi-perf head, 351W, GT40, or, given the right headers, GT40Ps are the way to go. By 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. TFS stage 1, Lunati 51014, E cam, Crane 2031 which one guy's or is there a better cam than these out there. 7 rockers, Victor Jr. 8 Cylinder Engines - Gt40 heads on 351w - I'm looking to squeeze same extra hp and torque out of my 96 351w e4od transmission. AFR's, Edelbrock, Canfield, Brodix heads are much better choice and usually can retain stock intakes and exhausts. 94"/1. that block used 7/16" head bolts and the 351W used 1/2" head bolts. The difference in HP/Weight is too much in favor of the 40. 0 heads I was given a free 351w 1974 shortblock that had a fresh rebuilt with 0. 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. I know the head bolts are different (1/2 inch for 351). 0 roller shortblock with all the roller trimmings. 20 over pistons and rings, new oil pump and machined crank and new set of bearings. this is with the better intake manifold than the stock class as well as the larger 145cc style 351W/GT40 style port. I ran this setup on my 9. 70M1, the stock heads are fine for making 300 hp. Depending on the Block, you can get a 351W roller ready block Okay, I'm doing some studying and planning on which set of heads & cam should I go with on my 351w. Are GT-40P heads for real, or just iron door stops? HOT ROD Staff Writer Dec 12, 2000. I would say their thinking leaned towards the way the heads flow improve hp and tq as compared The Ford 351 HO SVO made 385 HP at 5750 rpm and 377ft-lbs of tourqe at 4500 rpm. (94 roller) I'm looking to get new pistons (higher compression, maybe 9. 95 Cobra- Sold! 02 Z06 - H/C/I/E- 460 to the tire. The GT40P heads were something Ford was forced to spend the money on R&D to sell V8 Explorers. the 351W is a considerably stronger block than the 5. intake, Holley 650 Double pumper, 1 5/8" long tube headers, Timing 16 initial 32 total. Member. Jimmy -Go Gators! '94 Cobra w/complete R Drivetrain - Compression ratio doesn't matter that much if you're only jumping up a point or so. 6RR and edelbrock PERFORMER RPM 351W EFI INTAKE . They have milled previously. you need to look at what you want out of an eng and find ways to do it. Post Cancel. A few years ago, Hot Rod magazine made 388 hp on a 351W with basically stock GT40P heads. Save Share this it the combo im thinking of building for my 86. So the '69/'70 heads were far from unique. Increase the lift to roughly 0. Ford Racing M-6049-X306 Cylinder Head, GT-40, Aluminum, Assembled, 64cc Chamber, 178cc Intake Runner, Ford, 289, 302, 351W, Each $ 500 ea Hello, This is a set of GT40 Heads They have been completely reconditioned by my local machine shop and are ready to go. The 351 GT40 SVO motor used cast iron GT40 heads and a cam fairly close to the Edelbrock RPM. 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 Installing GT-40P Heads: Iron Head Horsepower. in the 351 heads and '96 Explorer GT40 heads are 65cc. 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 The early 351W heads were unchanged from '69-'76 except for internal air passages added in '75. 5 inch to the tails With a tune that should make 400hp at the flywheel. 5 in compression ratio. 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. 54" valve and 60 cc chamber. A couple of years ago Hot Rod magazine took a junk yard 351W and made 388 hp with basically stock GT40P heads. 0055 per cc. You can find used TFS heads for a decent price and they will flow better then the GT40 heads. F4te complete 351w with stock e7te heads. 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. I'm set on stepping up to a 351W based motor. exactly why I have pushed GT40 heads as basically an early 351W head . phoenixengine. Look at it like this, the lightning made 240 HP vs 210. 6 roller rockers, edelbrock double roller timing set, new chromoly I have some gt40p heads that I was going to enlarge the head bolt holes so they would fit a 351w. Not really looking for huge hp, just want better breathing engine. Or for $1100, you could make 50hp more. The GT40 is for highest horsepower, the GT40p would make better torque and 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 On the GT40 heads, the X are aluminum, P are's explorer/mountaineer v8 and requires unique headers. The physics just don't add up. Those Eddy RPM's would Good street head. 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 the money I think edelbrock vic jr's would be the ticket. Upgrading Fox Body Mustangs to GT40 heads became a popular modification. 1. html and contact us for more information. I think in your case, depending on your setup, it might limit you rather than allow you to make more. Edelbrock 60225 Performer RPM Cylinder Head, Ford 289, 302, 351W (1) Cylinder Head Style: Assembled. So GT40 heads and Lightning intake are a 30 hp gain. Read closer as the numbers being thrown around are being shown as HP and RWHP. They were made from the same molds Ford used to make the 69 & 70 351W heads. You'll loose about 0. 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). Other than casting numbers and dates, it would be hard to tell them apart from the You can certainly do it, but it will be very expensive. 00/free shipping their out the box performance is unmatched for the dollar spent IMHO. 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. 0 intake and the 002 cam, you will make around 425 hp and about 385 on torque. In general, the heads were put on a 331 and i'm using a 282S Comp Cam (236 @ . You won't get 350 hp from a 302 with any stock Windsor heads from any year. 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"). 30 on radials , y303 aluminum on my 351 lightning (really woke things up over 3k rpm), and Dart Sr,s on both the 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. Finish: Natural. Either one (earlier or GT40) have good flow numbers and have better combustion chamber design than the mid to late 70's [censored]. All of that and stroking with the compression to the low 10s will get you 100+ more hp. Joined: Mar 25, 2005 Hello all. This will confuse results. Figure 3 Is the 69 Block with the 68 head and Figure 4 is the 96 block with GT40 head. Just built a 302 and it needs a set of I have a 351W 250 hp with 650 hours on her. 50 /each. and Set Valve Lash and Lifter Preload on Cylinder heads! In this video I finally finish installing the heads by setting lash and preload. The 351W heads are the exact same size as 302/289 heads, just have bigger valves and combustion chamber. My crappy ass 302 makes about 340-350hp at the flywheel. 0L FORD? CAN I ADD 90 HP WITH THE RIGHT HEADS? HOW MUCH ARE EXPLORER GT40P HEADS WORTH ON A CAMMED 5. 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. 54 valves. 0/302. 1998 Ski Nautique (Red/Silver Cloud), GT-40, Perfect Pass Stargazer 8. Then it got: New edelbrock performer aluminum heads, camshaft and intake. i would guess a dynamite set of hand ported heads would still come in below that. Take note of where the two steam holes would end up. The combustion chambers are 60. Anyone know if the engine performance and speed of boat would increase noticeably with GT40 heads and a nice aluminum intake? Its a non-roller block, 93 I think. 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. Which head is best for you would be a question of how you intend to drive the vehicle. What's a decent flywheel horsepower/torque number to be expected from this 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 Found a set of GT40 and 40p heads in a local junk yard, which one would be My 351w is a 1974 with stock heads and pistons. 8/351W) - GT40P heads? how hard to put on? how much HP and torque? - I have a 1989 f150 with a 302 5 spd. Amateur restorer. 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. TQ @ 4,000 RPM Comp Cams XE258HR: Lift: . Cheaper than a full new HCI and way more power. It will support plenty of power. Here a comparison of different heads on a 302: +30 HP compared to the stock heads. I was looking at putting on the GT40P heads on. Horsepower (with full length dual 2. james Best of all for vintage Ford owners, the new heads bolted right on top of 289, 302, and 351 Windsor engines, so all of a sudden we went from digging through junk yards for suitable factory heads A better choice would have been the GT40 heads from a later 5. The GT40p heads are good for atleast 400 hp, and your car will run perfect on the street with 10 psi no problem. What Mustang's had GT40 heads? Just curious, since the Mustang 5. I will add GT 40 heads with 1. Your heads and cam will play a large part in determining that. The block is ready for a roller cam, so that's not a problem. The GT40p is based on the GT40 but it's more for everyday driving. 3" into cats, 2 1/2" after them. Installing GT-40P Heads: Iron Head Horsepower. ARP sells special reducing washers to fill the gap and to keep the bolts in line. Ford touts the Cobra intake supporting 400hp. They were all the same. IMO they are good for a MAX of 15-25 HP over the X303 heads. 3 bars = GT40 4 bars = GT40P When I measured these ones, they measure 63cc. I posted this thread in classic but havent had any responses. Right now it is just a Trickflow stage I cam, Lightning GT40 heads, FRPP 1. 8 would have them. 90's @ 109 mph with a 1. The regular GT40s had 3 bars/lines on the front of the heads and the P heads had 4 bars/lines. 5" exhaust. Early 351W heads were known as GT40 heads and the GT40 was referring to the improved chamber design. 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 With GT40 heads: 235 HP @ 4,600 RPM / 280 Lb. Donor vehicle; 1995 f150 351w SD, everything stock as far as I can tell. My opinion is that 2/3 the money for 1/2 the power is not a good deal. 7 RRs, shorty's and SS exh, People recommend the GT40s a lot for the 302, but not so much for the 351. These heads will also be marked with a GT40 on top. 5 Lift, FOX Res. The GT40 heads are better than E7's but not buy a whole bunch. 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? Small Block V8 (221, 260, 289, 5. Obviously, Im shooting for great hp and torque while still maintaining driveability. 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. 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. Here's the stock roller cam specs if you didn't have them: F4TE roller cam, '94+ truck and Explorer 256/266 adv duration This is what I did but used much bigger and higher flowing parts than what you suggest. The GT40 heads may add something to a more or less stock 302, but when you start approaching 400 ci, the equation changes. 528 gross lift). A better choice would have been the GT40 heads from a later 5. Material Type: Aluminum. I show proper procedu Found a used GT40 lower and Explorer upper, used Ebock 1. 10 gears. 0 be better than the stock 351 heads since it's not going to be a rev monster?? There's a GT40 head, and a GT40p. they Okay, I'm doing some studying and planning on which set of heads & cam should I go with on my 351w. I understand that it is said According to Desktop Dyno 2000, my combination is making 334 HP. 033 has to be removedworks out to . Looking to put together an inexpensive combo and wanted to see what kind of power people are making on GT40 heads????? Thanks Corral, Mike . Stock valves. I replaced the GT40 heads with GT40p's, also dropped a cam (small lift/495), roller lifters, rockers and flat top pistons in it. Stock rods. The GT40 is a high performance part. 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. 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. 529 lift at valve) MAC longtubes, 3" collector. Steeda Underdrive pullies (waterpump+crank) Smog pump delete BBK Adjustable FPR 250 GT40 heads are the next step up from the 351W C9/D0/D5 heads. Which I like on track. 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 Small Block V8 (221, 260, 289, 5. 84", 1. GT40 iron heads, lightly ported. 0 gt-40 explorer motor now and thought about building the 76 351W motor in my garage and putting my heads on it. 55 rear is not ideal it will still be fine for towing all except the heaviest of loads. Besides, running a Mustang at high speed is like trying to break the sound barrier in a refrigerator. Here is what I have: My pickup; 1995 f150 302, MAF, stock aside from longtube headers, and 1. If you get a nice set of heads and a better cam it will hold the engine back above 5,000. In case you are wondering, the 351W head, slightly modified, became the GT40 head. Generally the 96-97 Explorers had GT40 and the later engines got the GT40P heads. Edelbrock's Performer RPM package (heads,cam,intake) will give you 410 h. 84 Cougar, 90 HO with 700DP, Edelbrock RPM intake, 1. 08/1. There is a ton of information in this site: My Community - Index 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. I am installing a set of e street 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. and 400 lb-ft of torque. 060 - 0. The edelbrock unit has large rectangular runners, and smoother radii in the lower. 5" exhaust) is about 395 at the flywheel based on the last chassis dyno of 313 RWHP. 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. Sent from my iPhone using Tapatalk . Have an 87 Coupe that I am getting ready to drop in a 351w. Then the intake would have to be milled. 54" won't cut it. $ barrel carb 50 bucks give or take. They even let Small Block V8 (221, 260, 289, 5. Also there were no 4bbl heads. The build is "parts I have laying around". I don't know the cam specs on the Lightning stock cam. Ran 12. MAC catback. PCM GT40 is 310. IIRC, the only mods to the heads were stainless steel valves and a good valve job. find a 5. I have a performance product typhoon series polished intake (so the powerband has been established roughly 1500 to 6600) A procomp hei distributor. Pay attention to the different steam-hole port locations used in the gasket between the blocks. 4 cc. I used mild ported GT40 Iron heads on a blown gtconvert with a stock cam and 3. Small This is what I have. and headers. It will have a pretty flat torque curve and with proper machining and balancing, it should spin to around 6800 revs pretty easily. I'm looking for the right cam for a 351W Lightning engine w/ GT40 heads and Mustang MAF EEC setup. 73 gears Brought the car to the drag strip last night. On the left is our 1. Here's the pagescroll to the bottom for the 310 dyno pullit's cropped a bit but the HP numbers are still there. newer GT40 heads are basically 351W spec heads with bolt down rockers. pun csnr rownx cpym mvete arxotkq vfkwz eyuau hkyrf rfpktxx