Since 2003, Jeff has held various positions at Car Craft (including editor), has written books on small block Chevy performance, and even cultivated an impressive collection of 1965 and 1966 Chevelles. (its not their engine) If you know him, ask him. Skip to main content. The Fora platform includes forum software by XenForo. Just got through porting one of my gt40p heads today. What would be the best cam and springs to use for these heads in a 302 Windsor? So I've got the motor and heads already for my maverick project. Can I run the new cam with the same roller hydraulic lifters or do I have to change the lifters too? These are a great head but do need some machining mods to make they really work well. Pretty sure that was name, but I could be wrong. that is a healthy budget deal. A forum community dedicated to Ford performance owners and enthusiasts. I recall having an absolute blast with my old K-code coupe back in the day. This is a common mistake with first-time cam buyers who dont necessarily appreciate that the cam is just one component of the overall engine package. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. All manufactured using advanced CNC technology for the extreme durability and precision required of the modern canted valve Ford Small Block at power levels around the 1000 mark reached during recent competitions at the EMC and at the strip. Mild Build Gt40p check out the. I have a 302 Windsor V8 EFI engine that I converted to a 600 cfm carburetor with a Street Warrior intake manifold. The GT40P heads flow a lot better than stock 351 heads. Depends on the budget. anyone have experience with GT40P heads on a 92 351W gt40p heads on a 289 in a 66 | Vintage Mustang Forums Mac and Ford Motorsport both make a GT40P spacific header. Everything fits, use the stock rockers and pushrods. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. If you're not a header kind of guy, the repro 289 HIPO manifolds bolt up to the GT40P heads with plenty of spark plug room. Long tube headers are a terrific idea, but you need to open up the exhaust side. We gained 45 hp and 40 lb-ft of torque. For all of us interested in Gt40p heads. A forum community dedicated to Ford Mustang owners and enthusiasts. T5 with 3.73s. The Fora platform includes forum software by XenForo. Jeff Smith: It would have been better to know a little bit more about your combination, but the short answer is yeswith a hydraulic roller camshaft, assuming the lifters are in good shape and the roller wheels show no unusual wear, they can be re-used on a new cam with no danger of adverse effects. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. I'm new and I'm currently building a 302 on a budget and want to raise compression without milling heads but by pistons and I want to get close to 10:1. Yea. Anythoughts? Supercharging GT40p heads | Modded Mustang Forums Real world data seems to show that GT40 or GT40P cylinder heads, assuming no other mods on your Foxbody, are good to add anywhere between 20-40 HP (over stock heads). .. i would not buy valves unless you need them amd would not switch to studs with these heads for your low hp . I'm wondering how these heads will interact with the paxton 1220 sl supercharger I'm trying to put on. With nitrous, this is easily a mid-11-second ride. Thank You. I guess I had it backwards, sorry about that, didn't mean to spread misinformation. MAC is the only manufacturer of these headers, and the parts we installed fit like a glove with no problems whatsoever. How to Get More Horsepower Out of a Ford 289 | It Still Runs We bolted the Ford to the dyno with a set of 158-inch long-tube headers and an 18-inch collector extension to help the low-speed torque, then we fired up the small-block. Take the assembly to a machine shop to have it balanced and install it in the block. As with all head installations, check piston-to-valve clearance before final startup. It turned out we were conservative on both counts. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. Small-block Fords and Mopars only use four head bolts per cylinder, so retaining proper head-gasket sealespecially with nitrousis a point that demands attention, so we ordered a set of Fel-Pro MLS head gaskets rather than a standard, composition gasket. On slicks the car went some low 7.70s right at 90mph. You just want to keep it out of detonation. Shop by category. 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. All costing in the end at least another $2k. Those heads were unported and had stock valve sizes! Performance & security by Cloudflare. In a 3,250-pound car like a Mustang with 3.50 gears and an automatic with a 2,800-rpm converter, this 5.0L could pull 12.80s at 108 mph. 302HO with gt40p heads | Mustang Forums at StangNet 1986 Short block with notched pistons. $700.98. 302 with GT40 heads | Ford Mustang Forums The hardest part of swapping the cam was just getting the timing cover off and back on again. Some ideas never go out of style. The longer duration created a slight loss of torque below 3,300 rpm compared to both previous cams, but beyond that mild loss of power, the bigger Voodo out-powered its smaller cousin, cranking out a peak torque of 355 lb-ft at 4,300 (a gain of 7 lb-ft over Test 2) and charging to a peak horsepower of 376 at 6,000 rpm. Plus you will need to drill all the head bolt holes out as the 351W uses larger head bolts. Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. If they are cheap enough, take them anyway. Over $2050 for the 165/185 renegades. The GT40P heads flow a lot better than stock 351 heads. 68stang351 Founding Member May 16, 2002 850 No-option stripper- I like strippers. For 2018, the Coyote makes 460 hp. GT40Ps have 58cc. The Fora platform includes forum software by XenForo. While the heads were off getting a massage, we turned our attention to the cam timing. Headers and a camshaft will help but the engine really needs aftermarket 3/8 inch connecting rod bolts and aftermarket cylinder heads. Save narve00 Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. Ford's seminal 302 engine (later re-dubbed the 5.0) has been popular with budget-minded hot rodders for decades. Ask Away! with Jeff Smith: Camshaft and Cylinder Head Recommendations . Best of all, no machining is required to install these on your stock cast iron heads! Fastest e303 5.0l's? - FourEyedPride.com This kind of improvement may not seem like much, but the owner of our test car, Jamie Holten, runs in FFW Trophy Stock where three-tenths is a lifetime. What did the heads flow? by travis Sun May 03, 2020 8:33 am. However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. I'm using the Trick Flow stage 1 cam with 1.7 roller rockers. GT40 vs GT40P: Who has Smaller Chamber Volume ! More compression Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow. We did a quick search for hydraulic roller cams and landed on a COMP camshaft that looked promising. This is what I recommend to everyone who is doing a budget 5.0 build. He'll have to get a gear for his distributor. Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. This 1979-1995 Mustang cylinder head and camshaft guide will overview the heads and cams we offer and how they will coincide. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. Ive bought wrecking yard SBFs and put 20 lbs of boost to them and spin them to 7000 and made 500 HP with several of them. If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. Yea. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. Worst AFR 165 dyno ever | Factory Five Racing Forum If I get different urges later, Ill pursue those then. Im new and Im currently building a 302 on a budget and want to raise compression without milling heads but by pistons and I want to get close to 10:1. Ford Factory 5.0 Performance Cylinder Heads. 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. 302 GT40 Dyno Results - FourEyedPride.com A trip to Orlando Speed World provided us with updated quarter-mile times. Ported Hurricane Single Plane and custom 750 HP. Very true about finding them at the local yards. Install a set of GT-40P cylinder heads from a late 1990's Ford Explorer or a set of GT40 heads from an early 1990's Mustang 5.0L. Here is the lowdown on exhaust manifolds and VALVE SPRINGS. Do you guys have part numbers for the spring kits? Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. Let us explain. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. I got a set of AFR heads , night and day. The heads got a 3 angle valve job, new valves from speed-pro and all the valve train was from crane that matched the current hydraulic cam. Not to mention, they will run circles around GT40P's out of the box.
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