Do not ever, ever think about using the tube type manifolds. GT40s have 64cc chambers. Worst AFR 165 dyno ever | Factory Five Racing Forum Sponsored. Ford 302W / 5.0L History & Specifications - The Ranger Station This is not a criticism but instead consider it to be more of a heads-up. These are Ford iron GT-40P heads. *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. 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. 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! GT40Ps have 58cc. 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. BONUS TEST-FOUR DIFFERENT 302 INTAKES.. All Ford Mustangs | Model Specific Forums, GT-40P Heads - 5.0 Mustang & Super Fords Magazine. A forum community dedicated to Ford Mustang owners and enthusiasts. 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. 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. This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. FORD GT40p 4 BAR HEADS IN GOOD CONDITION w/ONE BOLT BROKEN Good on ya Jeff Smith. Through Central Coast you can have the heads fully prepped for your combination. How to Build a Cheap Drag Racing 302 Ford Motor | It Still Runs 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. Also, the spark plug angle makes it a pain. 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. Using the manufacturer recommended springs for your camshaft are a safe bet. 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. Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. Buy the lifters for peace of mind now and hopefully for the duration. In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. An aggressive cam will wake it up a bit. Free shipping. The gt40p head is considered the best OEM 302 head made. The only way to really make more power is to go with a stroker kit, blower and/or heads. Test 2: Changed to the smaller of the two Lunati camshaftsno other changes. 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. Yes- thank you. fordfan289, Aug 27, 2011 Depends on the budget. The GT40P heads flow a lot better than stock 351 heads. T5z and 3.89 9" TL rear. We know what you're thinking--only two-tenths from an extra 45 hp? Is asking advice for a fairly common situation involving parts with mandatory compatibility between the two for performance and longevity. well i finally did my first ever carb build, ive always been an EFI guy Black 1985 GT: 408w, in the 6's in the 1/8 mile. Get 500 Horsepower from a Junkyard Ford Explorer 302 - MotorTrend I got lucky and found a complete Explorer GT40P engine online. The Fora platform includes forum software by XenForo. This 1979-1995 Mustang cylinder head and camshaft guide will overview the heads and cams we offer and how they will coincide. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. Purchase a set of flat top pistons (from Ford Motorsport, TRW or Keith Black) with machined valve reliefs and designed to provide 10:1 compression with a 59 to 60 cc combustion chamber cylinder head. They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. Every thing he tells you on this site is true. Application Fits 1979-95 Mustang 302/351 w/ OEM Small Block Ford Heads hole size 302 is 7/16 and 351 is 1/2 Build Thread 1965 Fastback Project "Racesteed". 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. Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. Without changing the stock pistons. We are offering a pair of original Ford Cobra 5.0 GT40 cast iron cylinder heads. There's not a lot of reson to use 351 heads later than '75 since they essentially identical to 302 heads except for head bolt holes. The engine was only rated at 215 hp, but it at least had 9.0:1 compression. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. After a couple grand you have a killer set of heads, but there's got to be a less-expensive way of making horsepower. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 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. Took me 7 hours to do one head.but they cleaned up real nice. Once the headers are in place, then you can consider if you still want more power. Well that article just got me very ancy, I want these 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. I must agree with Jeff Smith. Nice to see actual dyno results instead of "butt dyno" guesses. Here is the lowdown on exhaust manifolds and VALVE SPRINGS. Just got through porting one of my gt40p heads today. 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? 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. Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. Even with a stock Mustang 5.0 cam makes good power. The factory heads have a boss for the exhaust valve that restricts flow through the exhaust port. 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 No-option stripper- I like strippers. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Go for it if you get them super cheap and can get headers/manifolds super cheap as well but otherwise I'd say it's a waste of time and money. JavaScript is disabled. E303 Cam advanced 4 degrees. You'll also have to use your 289 timing chain cover since it has a hole for the oil dip stick and fuel pump. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. 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:?:!?!?!? 302 GT40 Dyno Results - FourEyedPride.com 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. Within a few hours of his discovery, the engine was sitting in the back of his truck on its way to a new home. $139.99. Along with the heads, we used MAC headers for GT-40P heads. Performance & security by Cloudflare. Junkyard Gt40p Heads-add 30+ Hp to Your 5.0l (For Free?) #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. There is a better way. 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. Definitely going to use my P heads. We decided to test both ideas, so we ordered two roller cams from Lunati: a shorter-duration cam that would deliver decent idle vacuum and maybe make around 320 to 335 hp, and a longer-duration version that might push the horsepower up to perhaps 350 hp. this head is complete with new 1.837 int valves and 1.536 exhaust valves. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . 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. 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. You could run a thinner head gasket as well. Mac and Ford Motorsport both make a GT40P spacific header. Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. 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. For both the GT40 and GT40p heads, I STRONGLY suggest upgrading the valve springs. For the first test, we were reusing the stock Explorer cam, so the engine didn't need any break-in time. The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. This is a common mistake with first-time cam buyers who dont necessarily appreciate that the cam is just one component of the overall engine package. Torque on the other hand isnt something to write home about. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The cost of a new set of standard replacement roller lifters is very affordable at major retailers like Summit. Budget 300HP 302 Build You keep stock drivability, and stock gas milage if you can stay out of boost. Theres many options available for a little more power. As usual, there is much more to this story. 02-11-2012, 07:16 PM #6 fiveoh 86lx The fix: basic power upgrades for a sluggish 302 Just make sure it is a roller cam. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. We also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. Good Luck. The hardest part of swapping the cam was just getting the timing cover off and back on again. At 4,300 rpm, the torque peaked at 348 lb-ft, a solid 20-lb-ft improvement, and the Lunati continued to outperform the stock cam all the way through with a peak horsepower increase of 60 hp at 354 hp at 5,700 rpm! We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. Very true about finding them at the local yards. That's an improvement of 22 hp over Test 2. Because of this, your tuneup will probably need to be modified. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. fuel injection system . 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. JavaScript is disabled. (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 added a link to it. 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. Over $2050 for the 165/185 renegades. 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. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. I need that part number too! GT40 Heads On A 289? | Ford Muscle Cars Tech Forum No-option stripper- I like strippers. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow. The asterisk HP differences are calculated using Test 1's 294-hp peak. They also have emissions legal heads as well. Never not once have I ever seen a SBF rod bolt create a failure. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. If I get different urges later, Ill pursue those then. Joined . timing and compression ratio with gt40p heads - Modded Mustang Forums I think one of the finer traits of a true car guy, is the patience to put a prized car away and just let it sit for a while rather than selling it when life gets in the way. I have a 432 HP non Hi Po 289 I built. 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.
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