Fastest e303 5.0l's? - FourEyedPride.com HAD '82 GT monochromatic (red).black cloth HAVE Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! I had those on my car before I upgraded and they were nice 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. 289 or 351 heads on a 302 advantage? | The H.A.M.B. Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. You should be able to get away with a 150 to 200 horsepower shot later, but it's best to start out small and work up. However I think the opportunity window is slowly closing. And have discovered something that I dont think anyone else knows. Purchase any used aftermarket manifold for the 302 that is designed to function in the 3,500 to 6,500 power band. Over $2050 for the 165/185 renegades. This is the main reason why these engines are not modified as much as the small block Chevy. There are a couple of reasons for this suggestion. The spark plug issue is almost a non-issue. Mac and Ford Motorsport both make a GT40P spacific header. He has worked as a tractor-trailer driver and mechanic, a rigger at a fire engine factory and as a race-car driver and builder. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? SBF engines are modified constantly. The "P" heads flow better. 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. Works on all factory cast iron E7, GT40, and GT40P cylinder heads! I'll prob take a trip up there this weekend after scavenging the junkyards, thanks a million. Depending on the Headers you have you might be okay. This website is using a security service to protect itself from online attacks. A forum community dedicated to Ford Mustang owners and enthusiasts. Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. GT 500; Posts: 8496; Location: Brisbane . Finally, we exchanged the Explorer's EFI manifold (which is a pretty good manifold in its own right) for an Edelbrock Performer RPM Air Gap intake and a Holley 750-cfm HP-style carburetor. The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. We also added an Edelbrock Performer RPM dual-plane intake and a set of 158-inch headers with no mufflers. MAC is the only manufacturer of these headers, and the parts we installed fit like a glove with no problems whatsoever. the engine is carburated of that makes a difference. 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. Calculating pushrod length Ask Away! with Jeff Smith: Camshaft and Cylinder Head Recommendations Trick Flow Mustang Valve Spring Upgrade Kit - Cast Iron Head (79-95) #1:::Throw out all your Magazines that suggest what to do! Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . Hey Motorheadty,Like your comments,question for ya,I have a 92 convertible,just bought a 5.0 out of a 94 gt that was just freshened up top end,gt40p heads w/new springs etc for the new E303 cam,new FRP roller lifters,Crane 1.7 rockers,hardened push rods,double roller timing set,all put on a bottom end w/104000 miles,needless to say previous owner pulled said engine after 800 miles and now building a 351,I pulled engine down my machinest,putting forged internals in and bolting everything back together,I want to run about a 150 shot N2o,and iam going carb,wondering which intake would be best w/the 150 shot,heard that dual planes might not be the way to go? They fill that spot between power and budget. Different years can have different combustion chamber sizes but ffor the most part there will be no performance increases by going with 302 heads. Someone does make the Tri-Y's headers for the early Mustangs using the "P" heads. Calculated compression to 9.8:1. Install a set of 1.7:1 roller-tipped rocker arms on the heads. The kit offers adjustable power from 50 to 250 hp with a simple jet change. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! GT40Ps have 58cc. While the heads were off getting a massage, we turned our attention to the cam timing. Also, the spark plug angle makes it a pain. 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. 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. Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. Instructions on porting the GT-40p heads here. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. All costing in the end at least another $2k. I got a GT40P off the assembly line years ago. Good Luck. When combined with modern power-makers, such as nitrous, the 302 is more than capable of producing 400+ horsepower for little more than the cost of a stock engine rebuild. The MPH was there to run a little better but the local track is about terrible. I recall having an absolute blast with my old K-code coupe back in the day. You gave me the info I was looking for, and I really do appreciate it. Ill do springs and a moderate cam and go for a good, dependable power plant. GT40P heads, 302 and Victor Jr. intake: - Factory Five Racing Forum hole size 302 is 7/16 and 351 is 1/2 The 2 heads are about the same when looking at the numbers with the GT40p heads having a slight edge. Speedmaster PCE281.2046 Small Block Ford Aluminum Cylinder Heads 62cc Posted on May 07, 2014 by promarengine. Motor is going into a Ranger. The asterisk HP differences are calculated using Test 1's 294-hp peak. 1.7 shaft rockers and beehives. this head fits years 95-01 explorer mountaineer mercury mountaineer . $700.98. FORD GT40p 4 BAR HEADS IN GOOD CONDITION . 1983 Mustang G.T. Add 40 to 70 HP to your 302 yourself - Factory Five Racing Forum The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. I'd much rather be able to drive it at 8 or 9/10s of what it can handle. JavaScript is disabled. #3::: Do your homework,get quality parts,dont skimp. HiPo manifolds and Ill be good. Not looking for crazy HP. Dec 8, 2011. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS | What's New GT40 vs GT40P: Who has Smaller Chamber Volume ! More compression 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). Once the headers are in place, then you can consider if you still want more power. The Fora platform includes forum software by XenForo. ***Most important is theStupid question is the one that was never asked!*** Nudge us with emails, and we'll make it happen. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. Just got through porting one of my gt40p heads today. The GT40 heads have thermactor holes built in to connect to the EGR/smog equipment whereas the GT40P heads use an external EGR connective system. AFR 165cc 58cc Heads. Required fields are marked *. Never not once have I ever seen a SBF rod bolt create a failure. Compare. built one using a 91' HO short block with a set of AFR 165 heads, Weiand . Slover primarily focused on the exhaust side of the GT40P heads. 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. The GT40P heads flow a lot better than stock 351 heads. I've got gt40p heads for it I'll be running, and can't afford better . VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. For the first test, we were reusing the stock Explorer cam, so the engine didn't need any break-in time. You can have your current 28 oz rebalanced to 50. Not to mention, they will run circles around GT40P's out of the box. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. Over $2050 for the 165/185 renegades. GT40p heads peak horsepower was [email protected] with 363ft/[email protected] The worked 351 heads showed peak . This engine will be good for your 65 Mustang. JavaScript is disabled. With. What you are trying to do is to increase the amount of airflow through the engine in order to make more power. These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. 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. JavaScript is disabled. 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. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS. In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. 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. Stock Ford 351W 4bbl dyno numbers - Don Terrill's Speed-Talk This is what I recommend to everyone who is doing a budget 5.0 build. this is the price for one head. FORD, SMALL BLOCK 302 HO w/ E7, GT40P & GT40 - Alex's Parts Yes Mr.Smith, your column here at OAC adorned with extreme performance without power adders, or all Engine as its known, from a superior pushrod Small Block featuring almost all USA sourced modern components with the familiar smell of Ford Blue. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. Best of all, no machining is required to install these on your stock cast iron heads! Even with a stock Mustang 5.0 cam makes good power. 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. I just read about this build on the corral.net. SB Ford GT40P Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. Cant wait to try um out. For all of us interested in Gt40p heads. Late-model ford GT40 and GT40P heads with 1.84-inch intake valves will also flow 185 cfm at 0.50 . For a better experience, please enable JavaScript in your browser before proceeding. With nitrous, this is easily a mid-11-second ride. Keep in mind that swapping camshafts is a fairly extensive effort. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? The Fora platform includes forum software by XenForo. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. Choosing pistons to complement GT40P heads - MustangWorks.com Here a comparison of different heads on a 302: I'm very happy with my GT40P. 1986 Short block with notched pistons. Aftermarket headers, such as those made by Hooker, BBK and Competition Engineering, are better and are just as easy, if somewhat more expensive, to procure used. Because its all been done time after time after. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. At the dragstrip, we gained two-tenths and 2 mph. 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. 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. Let us explain. 69.90.139.244 JEGS High Performance. . GT40P Heads how much hp from them. - StangNet I am sure you have increased the bore size and possibly even the stroke a bit and spin it up pretty high in the RPM range. 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. Application Fits 1979-95 Mustang 302/351 w/ OEM Small Block Ford Heads are you twisted331 also? There are too many variables to add to this regarding aftermarket stroker kits or components. Anyways, I know the gt40ps will bump . If you're going to use the stock 289 heads, install 1.84-inch intake valves, then port the intake and exhaust; these mods will net you about 185 cfm of intake port flow at 0.50 lift. 68stang351 Founding Member May 16, 2002 850 Pretty sure that was name, but I could be wrong. i have a question once i get the gt40p heads from the explorer truck can i also take the exhaust manifolds or headers and fit them in my 66 mustang:?:!?!?!? check out the. But dont think that adding a bigger camshaft will make more power. Limited header choice is certainly a challenge. Click to reveal The gt40p head is considered the best OEM 302 head made. For the most part 302 heads and 351W heads are the same. any input is apprecciated:smartass: Thank you for the info, if all I have to worry about is the plugs then I'm in good shape hahaha. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. 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. I spin it to 6500 and thats about it. Everything fits, use the stock rockers and pushrods. No-option stripper- I like strippers. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. Buy the lifters for peace of mind now and hopefully for the duration. 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! Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. Weiand 7515 xcellerator intake. E303 Cam advanced 4 degrees. 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. 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. For a better experience, please enable JavaScript in your browser before proceeding. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - anyone have experience with GT40P heads on a 92 351W - ive got a 92 F250 with a 351W that needs a pretty serious rebuild. We know what you're thinking--only two-tenths from an extra 45 hp? The combination of this cam with your intake and headers will produce a very nice street engine. i have a 302 engine from a 1977 granada and i am wondering if gt40p heads from an explorer will fit on this motor. Supercharging GT40p heads | Modded Mustang Forums #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! While we've seen engine dyno tests performed with GT-40P heads replacing factory E7TE castings and resulting in a boost of more than 25 hp, we have reluctantly set our horsepower gain goal at 25 ponies, as well. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. Like I said lots of options. 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. We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. Holten's best time is a 12.63 at 105.9 mph, and if we gain the desired result he will be right in the thick of things in Trophy Stock competition. Because of this, your tuneup will probably need to be modified. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. Car Craft mag. Last Edit: January 18, 2015, 12:05:31 pm by businesstrader Logged shaunp. Gasoline/Diesel all makes on earth & still doing it today with great pride.Feel free to contact me anytime. Joined: Sun Mar 15, 2009 9:31 am. There are caveats to this plan, however. It's an 86 roller 5.0 engine that had a recent rebuild sometime in the past with keith black pistons, otherwise stock. Can anyone give me a little feedback about a '99 Explorer 5.0, and tell me if it's my answer. 99 Explorer engine (302) with GT40P heads - Ford Muscle Cars Tech Forum With the P-heads requiring pedestal-mount rockers, we also called up Crane Cams for a set of 1.6 pedestal-mount roller rockers. Stock 1989 5.0L HO pistons will work if you can find them. gt40p heads on a 289 in a 66 | Vintage Mustang Forums The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. I'd get the gt40 setup, and put an s trim on it. We turned to Rare Auto Design in Orlando for dyno tests to find out how much horsepower we gained. Save narve00 Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. What did the heads flow? If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. We compare the GT40s to modern cylinder heads as well as other heads from the era. We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. Be careful, I was once bitten by one of those reptile engine builders. I am working on a set of iron GT40s hoping it goes faster. Rowe studied engineering, philosophy and American literature at Central Florida Community College. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. 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. This combination should be good for about 400 horsepower and as much as 500 if you opt to use the stronger aftermarket pistons. As a matter of fact, Central Coast has an '89 coupe with GT-40P heads that has run a best of 11.98 in the quarter-mile. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. The hardest part of swapping the cam was just getting the timing cover off and back on again. Those heads were unported and had stock valve sizes! 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. When compared to the new generation of performance engines on the market today like the 5.0L DOHC Coyote engine, your engine will not come close. Then why did you port the heads and how do you know if you made an improvement. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. Free shipping. A LOT of them do it these days. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. No-option stripper- I like strippers. We also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. I'm wondering how these heads will interact with the paxton 1220 sl supercharger I'm trying to put on. I had a set of 69 302 heads I ran for a while . Check my post above. That's fantastic for the minimal investment we made. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. 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. Ive been building ENGINES for 40+ years. This is needed for the steel roller cam. For a better experience, please enable JavaScript in your browser before proceeding. Through Central Coast you can have the heads fully prepped for your combination. 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. This is an older thread, you may not receive a response, and could be reviving an old thread. I turned it because it was tired when I got it. . It turned out we were conservative on both counts. Seriously though if you're not planning on an all-out attack for HP, I'd consider a forged piston out of Probe's SRS line-up. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. 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. Yeah, except those. a) ain't early and b) aren't 289 heads. I love my setup and it is very strong engine. Ha! After we installed the heads and with the fan off, he ran a 12.46 at 107.9. Their weak point is that the rotator used on the exhaust valve is very thick. Manual trans. 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. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. But the part about a cam replacement possibly being a labor intensive undertaking is correct. The heads that were used were also old C8 casting with 58cc chambers. people can stop saying that adding aftermarket cam with stock heads is a waste of time. 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. United Engine and Machine sells cheap but decent pistons that will do what you're wanting. 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. What Cam and Springs to Use for GT40 Heads Well also assume that this engine is running stock exhaust manifolds. Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. . 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. For 2018, the Coyote makes 460 hp. Where they differ is the combustion chamber size. 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. In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. (Image/Harrison Creamery). 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. 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 a function of the somewhat wider lobe-separation angle of 112 degrees. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. The factory heads have a boss for the exhaust valve that restricts flow through the exhaust port. Common sense would suggest that with the heavy lifting complete and the old cam removed, by not installing the new roller lifters along with the camshaft could be asking for the possibility of trouble just a few thousand miles down the road.
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