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You'll also have to use your 289 timing chain cover since it has a hole for the oil dip stick and fuel pump. As with Chevrolet's small-block engine, the aftermarket has had dozens of years to expand the range and reduce the cost of the parts they offer for this engine. However, theres a distinct possibility that I might pull all of my hair out if I see another in-depth article explaining how I, along with just over a billion other desperate humans seeking answers, need special valve spring split locks for my next tired Chevy build. Consider having the head's intake ports matched to the intake manifold gasket. Small Block Ford 289/302/5.0L/351w 180cc/60cc Aluminum Cylinder Head E42004. 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. I'm sure the dyno operator used some goofball correction factor to make the numbers look higher. 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. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. this head fits years 95-01 explorer mountaineer mercury mountaineer . how hard to put on? 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. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. You just want to keep it out of detonation. Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. United Engine and Machine sells cheap but decent pistons that will do what you're wanting. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. Motor is going into a Ranger. There was an article in Hot Rod magazine in the mid '80's where Jon Kaase was developing 351w packages. Take the assembly to a machine shop to have it balanced and install it in the block. This is not a criticism but instead consider it to be more of a heads-up. I am working on a set of iron GT40s hoping it goes faster. I went to a couple in Tucson and almost all the Ford vehicles that came with a 5.0 had the heads missing. How much HP and torque do you think I. For all of us interested in Gt40p heads. Can I run the new cam with the same roller hydraulic lifters or do I have to change the lifters too? The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. For this reason, we're not sure what kind of boost the GT-40P heads will give. The car weighs #2835 with driver. Because its all been done time after time after. Shop by category. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! You'll have to plug the oil hole that is in the engine from the old oil dipstick. 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. The Fora platform includes forum software by XenForo. I got rid of the carburetor and went with a F.A.S.T. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. bmcdaniel, Feb 17, 2004 #7. v8maverick Member. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. We need a build on a 400+ hp 302/6 build. 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. 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. We compare the GT40s to modern cylinder heads as well as other heads from the era. It's a classic move we've pulled off many times. 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. All this is worth it. The GT40P heads flow a lot better than stock 351 heads. Along with the heads, we used MAC headers for GT-40P heads. Very true about finding them at the local yards. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. Your IP: We've already been motivated to put this engine in a buddy's Mustang. (Image/Harrison Creamery). Stock valve sizes? With the P-heads requiring pedestal-mount rockers, we also called up Crane Cams for a set of 1.6 pedestal-mount roller rockers. If they are cheap enough, take them anyway. Definitely going to use my P heads. And have discovered something that I dont think anyone else knows. Just put some 1.7 pedistal rocker arm on along with a mild camshaft (make sure to use the correct valve springs), you will make over 300 flywheel hp. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. Build Thread 1965 Fastback Project "Racesteed". Well assume it is a 5.0L with stock heads. fordfan289, Aug 27, 2011 According to his data and verified dyno tests with an EFI 302, you can go above this level if you port the stock, lower intake manifold, or upgrade it altogether. Learn how your comment data is processed. Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. Headers and a camshaft will help but the engine really needs aftermarket 3/8 inch connecting rod bolts and aftermarket cylinder heads. In review, we rescued a used 5.0L Ford from the boneyard, ported the heads, added a cam, carburetor, intake manifold, and headers, and pulled an amazing 376 hp out of the mix. The hardest part of swapping the cam was just getting the timing cover off and back on again. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. This 1979-1995 Mustang cylinder head and camshaft guide will overview the heads and cams we offer and how they will coincide. Boy, were we surprised with the results. 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. No-option stripper- I like strippers. So . 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. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Without changing the stock pistons. That's a 40 per cent increase in power from a simple head and cam swap, and one seriously happy Mustang owner! Thanks for the help, I was planning on puttingin roller rockers or at least new springs, and that engine looks great, hoppfully mine will look at least similar to that one of these days. Those are really good numbers. Instructions on porting the GT-40p heads here. You need to check. For a better experience, please enable JavaScript in your browser before proceeding. The valve seats have been cut on a . You gave me the info I was looking for, and I really do appreciate it. Slover primarily focused on the exhaust side of the GT40P heads. Buy the lifters for peace of mind now and hopefully for the duration. The Fora platform includes forum software by XenForo. I must agree with Jeff Smith. I got a set of AFR heads , night and day. You can have your current 28 oz rebalanced to 50. Then why did you port the heads and how do you know if you made an improvement. 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. However I think the opportunity window is slowly closing. The Fora platform includes forum software by XenForo. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. When building an engine there is a lot to take into consideration. We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. GT40P heads, what kind of performance do they give? 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. Depends on the budget. SBF engines are modified constantly. Do you guys have part numbers for the spring kits? I view the GT40P heads similar to Granada brakes. I have a 302 Windsor V8 EFI engine that I converted to a 600 cfm carburetor with a Street Warrior intake manifold. 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. 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. Calculating pushrod length 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. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. 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. But dont think that adding a bigger camshaft will make more power. On slicks the car went some low 7.70s right at 90mph. Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. 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. Always the weak area in the 289 and 302 is the tiny 5/16 inch connecting rod bolts and the miniscule intake and exhaust ports. check out the. Location: Re: Stock Ford 351W 4bbl dyno numbers. 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. 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. Scorpion 1.6 roller rockers. 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. We turned to Rare Auto Design in Orlando for dyno tests to find out how much horsepower we gained. It turned out we were conservative on both counts. Really hurt too. The only way to really make more power is to go with a stroker kit, blower and/or heads. http://vb.foureyedpride.com/showthread.php?t=89153, http://www.facebook.com/groups/233213650060739/, 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 An aggressive cam will wake it up a bit. In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. Eldelbrocks Air Gap intake manifold should work well with the combination. I can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. You can email the site owner to let them know you were blocked. Cant wait to try um out. Nice to see actual dyno results instead of "butt dyno" guesses. I got lucky and found a complete Explorer GT40P engine online. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. Someone does make the Tri-Y's headers for the early Mustangs using the "P" heads. If you have a early 351W ie pre 76 it probably . Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . 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. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members). Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. that is a healthy budget deal. For both the GT40 and GT40p heads, I STRONGLY suggest upgrading the valve springs. All Ford Mustangs | Model Specific Forums, GT-40P Heads - 5.0 Mustang & Super Fords Magazine. Through Central Coast you can have the heads fully prepped for your combination. Test 2: Changed to the smaller of the two Lunati camshaftsno other changes. 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. Thank You. Gasoline/Diesel all makes on earth & still doing it today with great pride.Feel free to contact me anytime. Beyond the engine's amazingly good appearance, Moore had a couple of good reasons for choosing this engine. You can have your current 28 oz rebalanced to 50. I'd much rather be able to drive it at 8 or 9/10s of what it can handle. The GT40P heads flow a lot better than stock 351 heads. Well also assume that this engine is running stock exhaust manifolds. As with all head installations, check piston-to-valve clearance before final startup. For a better experience, please enable JavaScript in your browser before proceeding. These are a great head but do need some machining mods to make they really work well. I've got gt40p heads for it I'll be running, and can't afford better . 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. 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. The headers will improve this airflow throughout the entire rpm rangeadding more torque and horsepower. A forum community dedicated to Ford Mustang owners and enthusiasts. For real performance, stock E7TE heads leave a lot to be desired.