Gt40p heads - FourEyedPride.com 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. I had a set of 69 302 heads I ran for a while . Adding the headers may also require a slight increase in secondary (and possibly primary) jetting to ensure the proper air-fuel ratio, but thats also an easy tuning change. Trick Flow Mustang Valve Spring Upgrade Kit - Cast Iron Head (79-95) This is the main reason why these engines are not modified as much as the small block Chevy. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. 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. 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. After graduating from Iowa State University with a journalism degree in 1978, he combined his two passions: cars and writing. 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. The hardest part of swapping the cam was just getting the timing cover off and back on again. A solid 300-325 hp should be plenty and that's with good drivability and reliability as well. You can have your current 28 oz rebalanced to 50. There was an article in Hot Rod magazine in the mid '80's where Jon Kaase was developing 351w packages. You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. 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. (A starter is a motor, windshield wipers use a motor,electric windows use motors) Any one uses that terminology in my shop will be corrected once, only once. I've not seen a set of longtubes that have an issue with GT40P's, either. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . The cost of a new set of standard replacement roller lifters is very affordable at major retailers like Summit. But don't think that adding a bigger camshaft will make more power. This will keep you from dropping your overall static compression ratio and losing power. Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. After a couple grand you have a killer set of heads, but there's got to be a less-expensive way of making horsepower. If you know him, ask him. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. JEGS High Performance. Late-model ford GT40 and GT40P heads with 1.84-inch intake valves will also flow 185 cfm at 0.50 . 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. - I have a 1989 f150 with a 302 5 spd. This engine will be good for your 65 Mustang. The headers will improve this airflow throughout the entire rpm rangeadding more torque and horsepower. 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. That's a 40 per cent increase in power from a simple head and cam swap, and one seriously happy Mustang owner! Richard Rowe has been writing professionally since 2007, specializing in automotive topics. A mild porting with gasket matching will be very good. 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. 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. We also added an Edelbrock Performer RPM dual-plane intake and a set of 158-inch headers with no mufflers. Generally expect with a good cam, intake, roller rockers and a good ignition system to see around 300-350 max rear wheel horsepower, depending on what type of dyno you use. While the heads were off getting a massage, we turned our attention to the cam timing. Sponsored. Aside from the cost of the nitrous itself, this setup should cost you little more than a stock rebuild using all brand new parts. The engine was only rated at 215 hp, but it at least had 9.0:1 compression. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The GTp heads are like GT 40's with smaller combustion chambers and the spark plugs are relocated for a more efficient burn. Runs well. check out the. There are a couple of reasons for this suggestion. 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. 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. You'll also have to use your 289 timing chain cover since it has a hole for the oil dip stick and fuel pump. Manual trans. Instructions on porting the GT-40p heads here. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. Worst AFR 165 dyno ever | Factory Five Racing Forum i'd love to use these heads,. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. For the most part 302 heads and 351W heads are the same. They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. 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 action you just performed triggered the security solution. 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. I am very happy too. that is a healthy budget deal. You'll have to plug the oil hole that is in the engine from the old oil dipstick. I'd get the gt40 setup, and put an s trim on it. FORD GT40p 4 BAR HEADS IN GOOD CONDITION . Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members). Over $2050 for the 165/185 renegades. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. this head fits years 95-01 explorer mountaineer mercury mountaineer . Choosing pistons to complement GT40P heads - MustangWorks.com 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. 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. Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. It's an 86 roller 5.0 engine that had a recent rebuild sometime in the past with keith black pistons, otherwise stock. 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 head is complete with new 1.837 int valves and 1.536 exhaust valves. Last Edit: January 18, 2015, 12:05:31 pm by businesstrader Logged shaunp. Add 40 to 70 HP to your 302 yourself - Factory Five Racing Forum many thanks to all you eco-hippies giving me dirty looks and helping me feel llike an overall badass rebel. This is a function of the somewhat wider lobe-separation angle of 112 degrees. Step 1. That's fantastic for the minimal investment we made. 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. The tube headers showed a gain of almost 100 hp! Actually the regular gt40's in either aluminum or iron are the good ones but the gt40p's are only a slight improvement over regular 302 heads. SB Ford, GT40 .575" Lift Max Output II Drop in Valve Spring Kit, Hyd Roller, 140 Lb Seat. 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. never messed with the timing, its at 35* total . 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. This is what I recommend to everyone who is doing a budget 5.0 build. 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. The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. MAC is the only manufacturer of these headers, and the parts we installed fit like a glove with no problems whatsoever. 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. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. This is needed for the steel roller cam. What you are trying to do is to increase the amount of airflow through the engine in order to make more power. Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. The Edelbrock Performer RPM is a good choice, but Holley, Weiand and Ford Motorsport also have similar offerings. Just make sure it is a roller cam. A forum community dedicated to Ford performance owners and enthusiasts. Not to mention, they will run circles around GT40P's out of the box. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? BONUS TEST-FOUR DIFFERENT 302 INTAKES.. For real performance, stock E7TE heads leave a lot to be desired. The later model distributors had a different diameter shaft than the earlier ones. Most of them are aware of what changes need to be completed. For all of us interested in Gt40p 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. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 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. Using the manufacturer recommended springs for your camshaft are a safe bet. Performance & security by Cloudflare. Would have liked to see a comparison done on the same short block using a set of decently-ported early non-Thermactor iron heads Tracy Blackford, 65 Mustang FB, 331 built with 289 H beam rods and 383W piston, 282S cam, self ported '70 351w heads, Dougs Tri-Y headers. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The kit offers adjustable power from 50 to 250 hp with a simple jet change. I was looking at putting on the GT40P heads on. 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. Also, the spark plug angle makes it a pain. 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. Location: Re: Stock Ford 351W 4bbl dyno numbers. As usual, there is much more to this story. 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. check out the. Car Craft mag. The combination of this cam with your intake and headers will produce a very nice street engine. 1979 Indy 500 Pace Car. There are caveats to this plan, however. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. What would be the best cam and springs to use for these heads in a 302 Windsor? Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. Install a "wet" nitrous plate system (which carries both nitrous and fuel) onto the intake manifold and jet it conservatively for a 100 horsepower shot. All this is worth it. 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. The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. 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. '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 anyone have experience with GT40P heads on a 92 351W Dyno results GT40P heads | Vintage Mustang Forums Pride is built, in your garage, with your two hands. Stock Ford 351W 4bbl dyno numbers - Don Terrill's Speed-Talk I must agree with Jeff Smith. GT40s have 64cc chambers. Here is my setup. 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. Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. It's a classic move we've pulled off many times. 99 Explorer engine (302) with GT40P heads - Ford Muscle Cars Tech Forum 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. Sponsored. 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. For a better experience, please enable JavaScript in your browser before proceeding. I have a 302 Windsor V8 EFI engine that I converted to a 600 cfm carburetor with a Street Warrior intake manifold. This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. 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. 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. #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! 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. Cant wait to try um out. Well that article just got me very ancy, I want these heads!! Weiand 7515 xcellerator intake. After we installed the heads and with the fan off, he ran a 12.46 at 107.9. At the dragstrip, we gained two-tenths and 2 mph. All Ford Mustangs | Model Specific Forums, GT-40P Heads - 5.0 Mustang & Super Fords Magazine. 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. . JUNKYARD GT40P HEADS-ADD 30+ HP TO YOUR 5.0L (FOR FREE?) The only one that's close, is #7. If the head bolt holes are 1/2" or slightly larger, ARP makes the washers and can be sourced from Ford Racing or ARP through a speed shop or Summit, Jegs and PAW among others. JavaScript is disabled. Free shipping. He'll have to get a gear for his distributor. Yes- thank you. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. GT40P heads, what kind of performance do they give? I'm using the Trick Flow stage 1 cam with 1.7 roller rockers. 1983 Mustang G.T. The dyno recorded a peak horsepower reading of 489 hp, but the air/fuel ratio was slightly on the rich side at 11.5:1, so we increased the nitrous jet to a 61 and hit the button again. Junkyard Gt40p Heads-add 30+ Hp to Your 5.0l (For Free?) In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. And agree the cams do help and a few tricks with the heads that I have discovered really make a difference. There are too many variables to add to this regarding aftermarket stroker kits or components. 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. 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.
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