Those are really good numbers. These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. I got rid of the carburetor and went with a F.A.S.T. Choose a cylinder head before you install the pistons. What would be the best cam and springs to use for these heads in a 302 Windsor? 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. You can email the site owner to let them know you were blocked. The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. But what we were most impressed with was the solid gain in torque over the smaller Voodoo cam from 3,500 and up. Not *as* good as the GT40p heads, but I'd prefer to not have to worry about exhaust fitment issues, or have a narrow range of what I can work with. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. Anythoughts? When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Is asking advice for a fairly common situation involving parts with mandatory compatibility between the two for performance and longevity. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. The results were a major increase in power throughout the entire rev range, with an increase of 60hp at 4500rpm through to a peak of 279hp at 5800rpm. The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. You didnt mention what camshaft you would be choosing or exactly which 5.0L Ford Windsor engine you are working with. Building a 302-inch small-block to produce 400 hp is really no big deal, but doing. 1996-2001 Ford Explorer 5.0L V8 Specifications Just put some 1.7 pedistal rocker arm on along with a mild camshaft (make sure to use the correct valve springs), you will make over 300 flywheel hp. Now we know why Dennis Hilliard of Central Coast Mustang is so high on these heads. The GT40 heads are a bit more versatile, working with the 5.4 and 6.8, while the GT40P (Explorer/Mountaineer) heads will only work on the 6.8 due to an interference issue. 950.00 us a set and will ship . Ford Factory 5.0 Performance Cylinder Heads. I ran the Speed Pro L2488 pistons and it had me around 9.9 compression with a .041 head gasket, Now I had GT40 heads milled .020 and so that's just a guess on the CC. Im running stock GT40 heads with stock 4.000 bore on cylinders and a Lunati cam with 256/262; Duration @ .050 (Int/Exh): 213/219; Gross Valve Lift (Int/Exh): .483/.499; LSA/ICL: 112/108. I'd get the gt40 setup, and put an s trim on it. These cast piston short-blocks are not quite as good as the forged piston 5.0L that came in Fox-body Mustangs, but the GT40P heads flow much better than earlier 5.0L heads. Have fun, be safe, enjoy. In less than an hour, we were ready to test. These are a great head but do need some machining mods to make they really work well. 1983 Mustang G.T. Let us explain. We also discovered some issues with the GT40P heads that required changes, so we added valves from Manley that eliminated the exhaust-valve rotators and allowed us to set the proper valvespring installed height. Good Luck. Yep my **** is coming apart again Isnt life great! You didnt mention the car this engine is in, but lets assume there is enough room to remove the radiator and any other coolers and perhaps some or all of the front grille and/or brackets before the cam has sufficient room to exit the front of the engine. We started with a 120,000-mile 5.0L out of a Ford Explorer, removed the EFI and DIS, and pocket ported the stock GT40P iron heads with stock valve sizes. 68stang351 Founding Member May 16, 2002 850 Holley 670 street avenger carb. After a couple grand you have a killer set of heads, but there's got to be a less-expensive way of making horsepower. Mac and Ford Motorsport both make a GT40P spacific header. Gt40p heads - FourEyedPride.com We decided to test both ideas, so we ordered two roller cams from Lunati: a shorter-duration cam that would deliver decent idle vacuum and maybe make around 320 to 335 hp, and a longer-duration version that might push the horsepower up to perhaps 350 hp. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. I have managed to get 402 horse power from a 289 hipo natural aspirated. Along with the heads, we used MAC headers for GT-40P heads. this head fits years 95-01 explorer mountaineer mercury mountaineer . Ford 302W / 5.0L History & Specifications - The Ranger Station 331/347 stroker w/gt40p's, waste?Hp?cost involved? - Maverick In order to make Coyote-type power you will need some expensive, high-flow cylinder heads with a short block that can withstand spinning in excess of 6,500 rpm. This is what I recommend to everyone who is doing a budget 5.0 build. *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. Install a set of 1.7:1 roller-tipped rocker arms on the heads. Choosing pistons to complement GT40P heads - MustangWorks.com The valve seats have been cut on a . There are literally a dozen or so camshaft companies that offer a mild hydraulic roller cam for a 5.0L Ford. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. Over $2050 for the 165/185 renegades. I am very happy too. the engine is carburated of that makes a difference. A LOT of them do it these days. For 2018, the Coyote makes 460 hp. JEGS High Performance. 02-11-2012, 07:16 PM #6 fiveoh 86lx The SUV indicated barely 120,000 on the clock, and after yanking the valve covers to judge the engine's condition, Tim Moore instantly made the decision to do the boneyard version of a smash-and-grab. Calculated compression to 9.8:1. With the P-heads requiring pedestal-mount rockers, we also called up Crane Cams for a set of 1.6 pedestal-mount roller rockers. It turned out we were conservative on both counts. Do not ever, ever think about using the tube type manifolds. United Engine and Machine sells cheap but decent pistons that will do what you're wanting. ***Most important is theStupid question is the one that was never asked!*** With gt40p heads and 289 hipo exhaust manifolds changing sparkplugs is the same as the original 302 heads and manifolds, I use the spark plugs that are recomended for the explorer with gt40p heads and you can use straight or angled boots. T5 with 3.73s. The reply has so many assumptions that I cant even assume to know the answer. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS | What's New Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. Application Fits 1979-95 Mustang 302/351 w/ OEM Small Block Ford Heads Stock 1989 5.0L HO pistons will work if you can find them. built one using a 91' HO short block with a set of AFR 165 heads, Weiand . Took me 7 hours to do one head.but they cleaned up real nice. The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. With the tuning finalized, the little cam made far more power than we expected, cranking out 328 lb-ft of torque at 4,200 and 294 hp at 5,400 rpm. Not sure how they would mate up to your existing exhuast, but otherwise they should work. The entire front accessory drive and timing chain cover must be removed, along with the distributor and intake manifold. Long tube headers are a terrific idea, but you need to open up the exhaust side. Slover primarily focused on the exhaust side of the GT40P heads. Beyond the engine's amazingly good appearance, Moore had a couple of good reasons for choosing this engine. Different years can have different combustion chamber sizes but ffor the most part there will be no performance increases by going with 302 heads. I think one of the finer traits of a true car guy, is the patience to put a prized car away and just let it sit for a while rather than selling it when life gets in the way. #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! However, theres a distinct possibility that I might pull all of my hair out if I see another in-depth article explaining how I, along with just over a billion other desperate humans seeking answers, need special valve spring split locks for my next tired Chevy build. First, adding headers will improve power on the existing combination. If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. Tim's junkyard refugee survived the beating and we had a bitchin' story. I love my setup and it is very strong engine. But the part about a cam replacement possibly being a labor intensive undertaking is correct. SBF engines are modified constantly. Win or lose, if you buy the ticket you must take the ride. The engine was only rated at 215 hp, but it at least had 9.0:1 compression. If you dont feel comfortable doing this higher a pro. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Here is the lowdown on exhaust manifolds and VALVE SPRINGS. Definitely going to use my P heads. For additional insurance, we also added a set of ARP head studs, which are stronger and offer better thread overlap than factory bolts, which helps prevent pulling threads out of a used block. If you smooth out the bowls and exhaust ports and gasket match the intakes they should flow decent. . Mild Build Gt40p Find many great new & used options and get the best deals for FORD GT40p 4 BAR HEADS IN GOOD CONDITION w/ONE BOLT BROKEN at the best online prices at eBay! Or, you could invest in a new set of heads that would also do the same job but you can expect to spend quite a bit more money. this is the price for one head. What Cam and Springs to Use for GT40 Heads The GT40 and GT40P cylinder heads are highly sought after, but how do they stack up against other cylinder heads, and is it worth it to upgrade the Fox Body's stock heads? We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. i know a guy who used to build race engines so he has all the right tools, how much would it help to get the heads ported and polished or anything else he could do to them. Paying a premium for a set of GT40P heads or dumping money into some to get their performance to rival aftermarket is not for me. The reason for this is that we're actually replacing mildly worked E7TE heads. Compare. Depends on the budget. $169.50. 302 explorer short block with roughly 80k miles GT40's from a local u pull n pay ($97) weiand x-celerator trick flow stage 1 cam 650 holley double pumper car made 322/329 SAE . Boy, were we surprised with the results. The later model distributors had a different diameter shaft than the earlier ones. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. The gt40p head is considered the best OEM 302 head made. THANKS VERY MUCH! Smith began writing for Car Craft magazine in 1979 and became editor in 1984. How to Build a Cheap Drag Racing 302 Ford Motor | It Still Runs According to his data and verified dyno tests with an EFI 302, you can go above this level if you port the stock, lower intake manifold, or upgrade it altogether. The heads that were used were also old C8 casting with 58cc chambers. FULL DYNO RESULTS. Maybe I'll think about a cam swap? Step 1. You need to check. K.S. (Please note these are not GT40P Explorer heads). Yeah, except those. a) ain't early and b) aren't 289 heads. #3::: Do your homework,get quality parts,dont skimp.
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