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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. Calculating pushrod length LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? hole size 302 is 7/16 and 351 is 1/2 Shop by category. For a better experience, please enable JavaScript in your browser before proceeding. Dec 8, 2011. Application Fits 1979-95 Mustang 302/351 w/ OEM Small Block Ford Heads Thanks. The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. GT40Ps have 58cc. GT 500; Posts: 8496; Location: Brisbane . Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. that is a healthy budget deal. If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. Instructions on porting the GT-40p heads here. For 2018, the Coyote makes 460 hp. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. 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. For a better experience, please enable JavaScript in your browser before proceeding. For the cherry on top of this Blue Oval desert, we bolted Mike Thermos' simple Powerstar plate nitrous system under the carburetor, installed the 140-hp jets (55 fuel and 55 nitrous), and used the trigger to retard the timing on the MSD ignition by 8 degrees. I'm also have the regular GT40 heads on my current build. The spark plug issue is almost a non-issue. There is a better way. fuel injection system . JavaScript is disabled. 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. 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. Free shipping. Sponsored. 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. 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. We need a build on a 400+ hp 302/6 build. Joined: Sun Mar 15, 2009 9:31 am. In an effort to preserve the history of the Early Fox Era, FEP covers the following vehicles: 79-86 Mustang and Capri, 84-86 Mustang SVO, 78-83 Fairmont & Zephyr, 83-86 LTD & Marquis, 80-88 Thunderbird & Cougar, 82-87 Continental, 84-92 Mark VII, 81-82 Granada. 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. GT40p heads peak horsepower was [email protected] with 363ft/[email protected] The worked 351 heads showed peak . Yea. I turned it because it was tired when I got it. 1983 Mustang G.T. I have a 432 HP non Hi Po 289 I built. 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. GT40P heads, what kind of performance do they give? I recall having an absolute blast with my old K-code coupe back in the day. The "P" heads flow better. If you're running a stock cam, 1.7 rockers will work perfectly. I'm wondering how these heads will interact with the paxton 1220 sl supercharger I'm trying to put on. 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 older pushrod engines just dont offer the same kind of power potential for their displacement and it all has to do with cylinder head flow. It's an 86 roller 5.0 engine that had a recent rebuild sometime in the past with keith black pistons, otherwise stock. 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. An aggressive cam will wake it up a bit. And have discovered something that I dont think anyone else knows. If you know him, ask him. For a better experience, please enable JavaScript in your browser before proceeding. (Please note these are not GT40P Explorer heads). A COMP hydraulic roller cam we found works well with this combination. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. Theres many options available for a little more power. I got rid of the carburetor and went with a F.A.S.T. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. $700.98. 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. Central Coast Mustang sells GT-40P heads at a great price, making them a viable alternative in a market flooded with performance head choices. Mac and Ford Motorsport both make a GT40P spacific header. Rowe studied engineering, philosophy and American literature at Central Florida Community College. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. 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. They suffered from poor aftermarket support up until about 15 years ago when it really came on strong. Boy, were we surprised with the results. bmcdaniel, Feb 17, 2004 #7. v8maverick Member. 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. A bone stock 2bbl early 351w with stock replacement forged pistons (9.0 compression) and dyno headers made 211 Hp . The best thing to do would be to use a specific break-in oil for the first 200 to 300 miles of use to reduce the change of a potential problem with undue wear. You gave me the info I was looking for, and I really do appreciate it. When I purchased my "brand new" set of GT40P's, I bought them from an Mustang specific machine shop that used to exist called Central Coast Mustang. What you are trying to do is to increase the amount of airflow through the engine in order to make more power. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. But don't think that adding a bigger camshaft will make more power. Depending on the Headers you have you might be okay. We then dyno'd the car without the fan to get some consistency and were rewarded with a peak of 316 hp at 5,500 rpm, and 348 lb-ft of torque at 4,000 rpm. 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. 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. The GT40P cylinder heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. The engine never huffed oil out of the breathers, and the spark plugs all looked excellent. Ford's seminal 302 engine (later re-dubbed the 5.0) has been popular with budget-minded hot rodders for decades. The GT40P heads flow a lot better than stock 351 heads. check out the. 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. And agree the cams do help and a few tricks with the heads that I have discovered really make a difference. Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1.7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. I'm an old school guy (289 in 65 mustang), and I'm just looking into the new 5.0 engine (roller cam) stuff recently. The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. The GT40P heads flow a lot better than stock 351 heads. 68 XR7 & 68 M-100. I have a very good running stock 1981 302 in a F100 short box. I got a GT40P off the assembly line years ago. The only failures Ive had were timing chains and a couple broken rods in a mid 80s 302 with 200,000 miles on it that got about 35 lbs of boost stuffed into it when a pop off valve I bought on ebay failed. Its funny no one mentioned anything about ignition timing or components, Your email address will not be published. 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. fordfan289, Aug 27, 2011 As usual, there is much more to this story. Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. JavaScript is disabled. Then why did you port the heads and how do you know if you made an improvement. I must agree with Jeff Smith. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. He'll have to get a gear for his distributor. The only one that's close, is #7. 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. JEGS High Performance. 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. We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. Someone does make the Tri-Y's headers for the early Mustangs using the "P" heads. Here is my setup. The car weighs #2835 with driver. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. Hey all, I'm working on building a 302 with my gt40p heads. Yep my **** is coming apart again Isnt life great! This is needed for the steel roller cam. All costing in the end at least another $2k. Joined . At the dragstrip, we gained two-tenths and 2 mph. many thanks to all you eco-hippies giving me dirty looks and helping me feel llike an overall badass rebel. The hardest part of swapping the cam was just getting the timing cover off and back on again. Again, assuming this is a nearly stock 5.0L with stock heads, the Weiand Street Warrior dual plane intake and 600 cfm carburetor, its important to not become overly aggressive and choose a big camshaft. Assuming this will be a daily driver engine, a short duration camshaft, especially when combined with a four-barrel dual plane intake manifold and headers, will deliver extremely snappy throttle response and the whole combination will increase the torque and peak horsepower by somewhere in the neighborhood of 20 to perhaps 35 horsepower. 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. . Good on ya Jeff Smith. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. Assorted screwdrivers, pliers and vise-grips. We've seen what happens from previous Ford experience when power levels above 500 hp tend to either pop head gaskets or saw blocks in half. Most all long tubes come out far enough to clear and other short tube headers will work but there is clearance issues on two of the cylinders. by travis Sun May 03, 2020 8:33 am. We also added an Edelbrock Performer RPM dual-plane intake and a set of 158-inch headers with no mufflers. 950.00 us a set and will ship . These are a great head but do need some machining mods to make they really work well. at the crank. With the GT-40P heads you will need to back off the timing a couple degrees and bump up the fuel pressure. Depends on the budget. As you might expect with more duration, the idle quality dropped significantly but was still able to make 11.5 inches of vacuum at 980 rpm. Part of this reason is due to its inherent strength and simplicity, but a lot of it has to do with how little Ford has changed it over the years. The entire front accessory drive and timing chain cover must be removed, along with the distributor and intake manifold. Do not ever, ever think about using the tube type manifolds. FULL DYNO RESULTS. Performance & security by Cloudflare. The GTp heads are like GT 40's with smaller combustion chambers and the spark plugs are relocated for a more efficient burn. Im now thinking of adding a cam to match the carb. 68 Mustang GT/CS Highland Green, PS, PB & Console, C Code w/C4 & 3.55 8 rear, If you aren't using the GT40P's stock, with maybe a spring upgrade and valve job, they aren't worth it anymore. We took the heads to Mike Slover of Slover's Porting Service in Sun Valley, California, to do this work, plus some basic pocket-porting to improve flowespecially on the exhaust side. There are a couple of reasons for this suggestion. The reason this new generation of Ford engines make a ton more power is they also enjoy fantastic cylinder heads and four valves per cylinder. For real performance, stock E7TE heads leave a lot to be desired. #1:::Throw out all your Magazines that suggest what to do! Motor is going into a Ranger. The tube headers showed a gain of almost 100 hp! This 1979-1995 Mustang cylinder head and camshaft guide will overview the heads and cams we offer and how they will coincide. 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. Do you guys have part numbers for the spring kits? A forum community dedicated to vintage Ford Mustang owners and enthusiasts. Building a 302-inch small-block to produce 400 hp is really no big deal, but doing. You didnt provide a lot of information about the engine itself, Im assuming its 85 or newer ( roller cam) May need a freshen up of the bottom end if compression is the issue. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! Our recommendation would be, rather than change the camshaft, you might want to look into adding a set of long-tube headers and a dual exhaust if the engine is not already so equipped. We also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. This is not a criticism but instead consider it to be more of a heads-up. i'd love to use these heads,. This engine will be good for your 65 Mustang. 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). Their weak point is that the rotator used on the exhaust valve is very thick. However, stepping up in the performance head market will set you back more than $1,200 for a decent pair of aluminum castings--and that's straight out of the box, with no porting. However I think the opportunity window is slowly closing. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. 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. Manual trans. You can use the stock roller lifters with any size cam you want. Well that article just got me very ancy, I want these heads!! Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. The only way to really make more power is to go with a stroker kit, blower and/or heads. Choose a cylinder head before you install the pistons. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. JavaScript is disabled. 02-11-2012, 07:16 PM #6 fiveoh 86lx ***Most important is theStupid question is the one that was never asked!*** Enter your search keyword. the engine is carburated of that makes a difference. This is an older thread, you may not receive a response, and could be reviving an old thread. Limited header choice is certainly a challenge. Let us explain. Consider having the head's intake ports matched to the intake manifold gasket. We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. Well also assume that this engine is running stock exhaust manifolds. made more power everytwhere and 40 hp is respectable. That's fantastic for the minimal investment we made. Compare. Everything fits, use the stock rockers and pushrods. 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. 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. The specs are a conservative 212/218 degrees of duration at 0.050-inch tappet lift but offer a really nice 0.512-inch valve lift for both the intake and exhaust. I wouldnt recommend reusing lifters though. Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. This time around, we chose a shining example of this junkyard art form. So I've got the motor and heads already for my maverick project. I'm using the Trick Flow stage 1 cam with 1.7 roller rockers. And remember ENGINES have been being built/rebuilt/modified for years. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS. Features hardened 4140 Chromoly retainers, valve locks, spring shims, a spring height gauge, valve seals, and instructions. I just read about this build on the corral.net. There are a lot of variables that must be addressed to give a better estimate, but a good basic estimate is 20-40 HP at the crank. Compare. 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. Save narve00 They almost seem like flywheel numbers rather than RWHP numbers. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. '85 GT vert two tone (white on charcoal)white leather, http://www.facebook.com/groups/233213650060739/, http://www.summitracing.com/parts/TFS-2500100/, ascMcLaren & Motorsport/Grand Prix IV Capris, RHD and Other International/Export Models, Mods, Maintenance & Mechanical FAQs/Archive, If this is your first visit, be sure to We probably could have coaxed an even 300 hp out of this stock configuration, but with such good numbers, we decided to jump right into the first Lunati cam.

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