just curious. With. The asterisk HP differences are calculated using Test 1's 294-hp peak. Click to reveal Im a different animal. 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. The GT40 & GT40P heads had a few differences that are note-worthy, the most importantly being the bump in compression. I was looking at putting on the GT40P heads on. Purchase any used aftermarket manifold for the 302 that is designed to function in the 3,500 to 6,500 power band. this head fits years 95-01 explorer mountaineer mercury mountaineer . I've got gt40p heads for it I'll be running, and can't afford better . The tube headers showed a gain of almost 100 hp! Joined: Sun Mar 15, 2009 9:31 am. 302, GT40P Heads, E cam, 4 into 4, Holley 600, Mallory Unilite, Levy SD T5, 3.73, 15" Team III, firewall mod, trunk mod, trailer hitch, drivers foot box mod, front tow rings. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! 1983 Mustang G.T. How much HP and torque do you think I. Ill do springs and a moderate cam and go for a good, dependable power plant. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. Small Block Ford 289/302/5.0L/351w 180cc/60cc Aluminum Cylinder Head E42004. 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. 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. This is what I recommend to everyone who is doing a budget 5.0 build. made more power everytwhere and 40 hp is respectable. It took him and yours truly eight hours from start to finish, using air tools and a lift to gain access to the header flanges. 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. 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. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. Stock heads with a fresh 3-angle valve job, shorty headers, T5, 4.10s, stock Explorer intake and stock '88 GT short block with 140,000 miles on it and an E cam in it. No-option stripper- I like strippers. I would like to know what heads, cam and intake manifold combination to use for the most HP I can squeeze out of that motor. Or just play it safe and let the fans ask away about another daring 5.0 TB bolt on or for an exciting surprise, do a LS______ fill in the blanks. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. I have heard this rod bolt weakness myth for years but have yet to have a single problem with them in any of the SBF engines I have pounded on for the last 30 years and there have been lots of them. The factory heads have a boss for the exhaust valve that restricts flow through the exhaust port. The GT40P heads flow a lot better than stock 351 heads. How to Build a Budget 383 Stroker Chevy How do I Increase Horsepower on a 440 Cylinder Head Specifications for a 1969 How to Get More Power Out of a 92 4.3 dragster engine image by Robert Young from, Copyright 2023 Leaf Group Ltd. / Leaf Group Media. No-option stripper- I like strippers. The entire front accessory drive and timing chain cover must be removed, along with the distributor and intake manifold. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. HAD '82 GT monochromatic (red).black cloth HAVE 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. OR you could put your automotive journalistic skills in motion by reporting on the many new modern components available for the latest generation 351 Cleveland. Weiand 7515 xcellerator intake. Since the engine is nearly stock, we would want to choose a relatively mild camshaft with somewhat more lift and duration than stock, but again not going too aggressive. 1983 Mustang G.T. GT40Ps have 58cc. I added a link to it. Install a set of 1.7:1 roller-tipped rocker arms on the heads. We need a build on a 400+ hp 302/6 build. We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. They also have emissions legal heads as well. 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. 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. I'm sure the dyno operator used some goofball correction factor to make the numbers look higher. never messed with the timing, its at 35* total . Ford Factory 5.0 Performance Cylinder Heads. A bone stock 2bbl early 351w with stock replacement forged pistons (9.0 compression) and dyno headers made 211 Hp . 69.90.139.244 Its always refreshing to see a FORD getting a little face time in your column, even if its a tired 302 with no great expectations of setting the world on fire when the dust settles. This will keep you from dropping your overall static compression ratio and losing power. *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. Step 1. A forum community dedicated to Ford performance owners and enthusiasts. You need to check. I got rid of the carburetor and went with a F.A.S.T. So . 69-70 302 heads (the ones with the heart-shaped combustion chamber) Any early 289 heads for the chamber size (but you'll have small ports & valves w/all that CR) Flat Ernie, Aug 27, 2011 SHARE POST #8 fordfan289 Member from indiana correct me if Im wrong but cant you use 351c heads and get the same thing as a 302 boss. 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. All in all, the addition of GT-40P heads to any 5.0 Mustang is a worthwhile venture, especially if you're on a budget (aren't we all) or shooting for the Trophy Stock title. Aside from the cost of the nitrous itself, this setup should cost you little more than a stock rebuild using all brand new parts. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members). GT40, GT40P, would be great factory heads. are you twisted331 also? However, since Holten's car has an E303 cam, we didn't want the pistons and valves becoming too close, so we chose the 1.6 rockers. 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. The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. Last Edit: January 18, 2015, 12:05:31 pm by businesstrader Logged shaunp. Its increase while significant is still only about that of a decent 351 w, hi im building a nastalgic car so im not going to drag race it but it must go ok ive got a 302 windsor basicly recoed stock but i want to run tunnel rams to go with the the3am would like to put choppy cam and replace the heads any ideas would be much apprecited thankyou, What is the stock head cc of a 1992 f150 302 windsor. Free shipping. SB Ford GT40P Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. Definitely going to use my P heads. . Theres many options available for a little more power. For those of you running a carb, or aftermarket intake, you already have a leg up in this area and should see even greater gains in power. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. Sure, you could race-port the existing E7 castings, which many have done, but then you're putting quite a bit of change into stock heads. Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. Test 2: Changed to the smaller of the two Lunati camshaftsno other changes. 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 . Sponsored. Hey all, I'm working on building a 302 with my gt40p heads. Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. 68stang351 Founding Member May 16, 2002 850 For real performance, stock E7TE heads leave a lot to be desired. They work, but present their own challenges. . We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. The Fora platform includes forum software by XenForo. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. These engines came with the GT40P head, which even with its small valves, offers really good performance. Finding Gt40p heads at the junkyard is getting more and more complicated and if you want to upgrade the heads you have to take into account the costs of the machine shop and compare everything to a set of cheap aluminum heads. Not to mention, they will run circles around GT40P's out of the box. Ford offered a performance head that was a stock part on 1993-1995 Mustang Cobra models and pre- 1997-1/2 Ford Explorers and Mercury Mountaineers equipped with the 5.0 L engine called the GT-40 head (casting ID F3ZE-AA). Yank a motor out of the junkyard, clean it up, add a camshaft, intake, and a carburetor, and see how much power we can squeeze out of it. K.S. I have a very good running stock 1981 302 in a F100 short box. Many years ago, a friend bought a used 2001 Mercury Mountaineer 5.0L that was equipped with a set of really decent GT40P style iron heads. If you're running a stock cam, 1.7 rockers will work perfectly. Your IP: In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. There was an article in Hot Rod magazine in the mid '80's where Jon Kaase was developing 351w packages. I have a 66 mustang with its original untouched 289 with over 140 k on it that Ive been running a blow thru turbo making 14 lbs of boost on for the last 5 years and its never given me a problem. 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? You just want to keep it out of detonation. If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. I am working on a set of iron GT40s hoping it goes faster. Then why did you port the heads and how do you know if you made an improvement. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. GT40P heads, what kind of performance do they give? Yes- thank you. That's more than enough to feed a power-brake booster. That's an improvement of 22 hp over Test 2. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! Central Coast Mustang sells GT-40P heads at a great price, making them a viable alternative in a market flooded with performance head choices. I got a GT40P off the assembly line years ago. Without changing the stock pistons. Using the manufacturer recommended springs for your camshaft are a safe bet. But don't think that adding a bigger camshaft will make more power.
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