Buy the lifters for peace of mind now and hopefully for the duration. 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. Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1.7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. Yep my **** is coming apart again Isnt life great! Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. (its not their engine) What did the heads flow? Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. never messed with the timing, its at 35* total . hole size 302 is 7/16 and 351 is 1/2 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. Gt40 heads/intake from a jy explorer, leave the . We bolted the Ford to the dyno with a set of 158-inch long-tube headers and an 18-inch collector extension to help the low-speed torque, then we fired up the small-block. This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. 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. Required fields are marked *. I wouldnt recommend reusing lifters though. This test went so well that we were eager to see what the slightly bigger cam would do. (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. 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. That's fantastic for the minimal investment we made. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. 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). The heads that were used were also old C8 casting with 58cc chambers. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. Those are really good numbers. Well also assume that this engine is running stock exhaust manifolds. The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. While the heads were off getting a massage, we turned our attention to the cam timing. Also, you'll need to get a steel distributor gear to replace the iron gear that is currently on your distributor. '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 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. 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. Aside from the cost of the nitrous itself, this setup should cost you little more than a stock rebuild using all brand new parts. check out the. 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. Now he serves as a regular contributor to OnAllCylinders. 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. Its funny no one mentioned anything about ignition timing or components, Your email address will not be published. These are some of the pictures I have showing the Explorer manifolds. These are Ford iron GT-40P heads. Definitely going to use my P heads. We will go into more detail on the head mods in a later story in Junkyard Builder, so watch for it. Small Block Ford 289/302/5.0L/351w 180cc/60cc Aluminum Cylinder Head E42004. I'd much rather be able to drive it at 8 or 9/10s of what it can handle. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. Test 3: Installed the larger Lunati camagain, no other changes. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. A forum community dedicated to Ford performance owners and enthusiasts. We've already been motivated to put this engine in a buddy's Mustang. 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. 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. I have a 5.0 from a 1992 Mustang in my 65. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. Step 1. fuel injection system . Because of this, your tuneup will probably need to be modified. They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. 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. I was looking at putting on the GT40P heads on. Depends on the budget. After we installed the heads and with the fan off, he ran a 12.46 at 107.9. The 2 heads are about the same when looking at the numbers with the GT40p heads having a slight edge. JavaScript is disabled. Features hardened 4140 Chromoly retainers, valve locks, spring shims, a spring height gauge, valve seals, and instructions. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. Performance & security by Cloudflare. this head is complete with new 1.837 int valves and 1.536 exhaust valves. A forum community dedicated to Ford Mustang owners and enthusiasts. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. This website is using a security service to protect itself from online attacks. Through Central Coast you can have the heads fully prepped for your combination. As noted, this is looking like hes building a 351 Lightning truck motor, which is a good way to go. 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. The valve seats have been cut on a . If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. All Ford Mustangs | Model Specific Forums, GT-40P Heads - 5.0 Mustang & Super Fords Magazine. The 5.0L with the GT40 head had a 9.0:1 compression, and the 5.0L with the GT40P head had 9.1:1 compression. 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. What would be the best cam and springs to use for these heads in a 302 Windsor? the engine is carburated of that makes a difference. Yea. I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. This time around, we chose a shining example of this junkyard art form. It's an 86 roller 5.0 engine that had a recent rebuild sometime in the past with keith black pistons, otherwise stock. Theres many options available for a little more power. Learn how your comment data is processed. The spark plug issue is almost a non-issue. 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. With the P-heads requiring pedestal-mount rockers, we also called up Crane Cams for a set of 1.6 pedestal-mount roller rockers. Is asking advice for a fairly common situation involving parts with mandatory compatibility between the two for performance and longevity. The Fora platform includes forum software by XenForo. 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. The MPH was there to run a little better but the local track is about terrible. Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. SBF engines are modified constantly. However realistically, with the amount of money spent modifying the gt40p heads or even those older 289 & 351w heads, you could have even better performing aluminum heads. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. As usual, there is much more to this story. Joined: Sun Mar 15, 2009 9:31 am. 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. 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. . FULL DYNO RESULTS. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! 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. Do not ever, ever think about using the tube type manifolds. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? Do you guys have part numbers for the spring kits? $700.98. 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. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. The GT40P heads flow a lot better than stock 351 heads. If you're running a stock cam, 1.7 rockers will work perfectly. I'll prob take a trip up there this weekend after scavenging the junkyards, thanks a million. 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. Cant wait to try um out. Early Windsors tend to have fairly restrictive exhaust manifolds, making the addition of a set of headers that much more efficient. many thanks to all you eco-hippies giving me dirty looks and helping me feel llike an overall badass rebel. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. Test 1: 750-cfm carburetor, dual-plane intake manifold, and stock camshaft. I'd get the gt40 setup, and put an s trim on it. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. 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. Ha! 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. You just want to keep it out of detonation. 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. We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. 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. 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. A good port job can set you back another $500-$1,000. . Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. The gt40p head is considered the best OEM 302 head made. 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 heads were unported and had stock valve sizes! This is the main reason why these engines are not modified as much as the small block Chevy. SB Ford GT40 Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. T5z and 3.89 9" TL rear. I would like to know what heads, cam and intake manifold combination to use for the most HP I can squeeze out of that motor. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. Eldelbrocks Air Gap intake manifold should work well with the combination. If there isnt room without disassembling half the front clip on the car, then it might be easier to remove the engine and do the conversion that way. Manual trans. But what we were most impressed with was the solid gain in torque over the smaller Voodoo cam from 3,500 and up. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. 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. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. 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. 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. I had those on my car before I upgraded and they were nice heads. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. Building a 302-inch small-block to produce 400 hp is really no big deal, but doing. Over $2050 for the 165/185 renegades. thats after 3 hours of idling/midrange hits to tune the idle and part throttle . document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. 302 .030 over with; Scat Forged Steel Rods, SpeedPro pistons and rings . With. In less than an hour, we were ready to test. Here a comparison of different heads on a 302: I'm very happy with my GT40P. So I've got the motor and heads already for my maverick project. GT40P heads, what kind of performance do they give? If you wanted to make your engine feel strong, these would be a decent investment, but they will require some modifications. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. For this reason, we're not sure what kind of boost the GT-40P heads will give. When building an engine there is a lot to take into consideration. After a couple grand you have a killer set of heads, but there's got to be a less-expensive way of making horsepower. It runs smooth but seems lazy. 69.90.139.244 how much HP and torque? Good on ya Jeff Smith. The cost of a new set of standard replacement roller lifters is very affordable at major retailers like Summit. Be careful, I was once bitten by one of those reptile engine builders. 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. I've not seen a set of longtubes that have an issue with GT40P's, either. #3::: Do your homework,get quality parts,dont skimp. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. Good Luck. 68stang351 Founding Member May 16, 2002 850 ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. 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. $169.50. Compare. I added a link to it. 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. Limited header choice is certainly a challenge. 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. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. I have to agree, the GT40P heads flow better than the GT40 iron heads. 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. people can stop saying that adding aftermarket cam with stock heads is a waste of time. As a final goal, we decided to bolt on a simple nitrous system and see if we could push this little small-block Ford to make some real power. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. But don't think that adding a bigger camshaft will make more power. 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. 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. They also have emissions legal heads as well. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 SBF OEM | eBay Motors, Parts & Accessories, Car & Truck Parts & Accessories | eBay! You could run a thinner head gasket as well. You didnt mention which cam you had in mind. . Their weak point is that the rotator used on the exhaust valve is very thick. I am working on a set of iron GT40s hoping it goes faster. Using the manufacturer recommended springs for your camshaft are a safe bet. 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. 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. AFR 165cc 58cc Heads. This will keep you from dropping your overall static compression ratio and losing power. Stock valve sizes? 68 XR7 & 68 M-100. If this is beyond your technical ability, you could ask a local machine shop to perform the modifications. 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. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. Weiand 7515 xcellerator intake. Here is the lowdown on exhaust manifolds and VALVE SPRINGS. Tim's junkyard refugee survived the beating and we had a bitchin' story. For a better experience, please enable JavaScript in your browser before proceeding. These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. #1:::Throw out all your Magazines that suggest what to do! Without changing the stock pistons. A trip to Orlando Speed World provided us with updated quarter-mile times. You'll also have to use your 289 timing chain cover since it has a hole for the oil dip stick and fuel pump. Because its all been done time after time after. *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. The GT40P heads flow a lot better than stock 351 heads. They suffered from poor aftermarket support up until about 15 years ago when it really came on strong. Don't let the fact that the iron GT40 heads have a larger exhaust valve fool you. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. The headers will improve this airflow throughout the entire rpm rangeadding more torque and horsepower. this is the price for one head. I had a set of 69 302 heads I ran for a while . Yeah, out of a bolt on upgrade, you'd probably be looking at 260-280rwhp ish with supporting mods. just curious. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 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. Ive been building ENGINES for 40+ years. At the time, I was still running smog equipment in a 1994 Mustang GT, so I had them drill the back of the heads for the thermactor connection. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. 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. +1 I would go with the regular GT40 heads. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. I'm wondering how these heads will interact with the paxton 1220 sl supercharger I'm trying to put on. There is a better way. PTP Engineering front suspension and 25540R17s all around. Check my post above. I've got gt40p heads for it I'll be running, and can't afford better . For the most part 302 heads and 351W heads are the same. The reply has so many assumptions that I cant even assume to know the answer. In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. 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! Cloudflare Ray ID: 7a2e2d95dedea1e4 How much HP and torque do you think I. 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. Purchase any used aftermarket manifold for the 302 that is designed to function in the 3,500 to 6,500 power band. In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. I got lucky and found a complete Explorer GT40P engine online. made more power everytwhere and 40 hp is respectable. I got lucky and found a complete Explorer GT40P engine online. 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. Your email address will not be published. 02-11-2012, 07:16 PM #6 fiveoh 86lx I guess I had it backwards, sorry about that, didn't mean to spread misinformation. I must agree with Jeff Smith. Rowe studied engineering, philosophy and American literature at Central Florida Community College.