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Gt40/gt40p Heads On A 351w Questions - StangNet The car weighs #2835 with driver. A solid 300-325 hp should be plenty and that's with good drivability and reliability as well. Free shipping for many products! Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. What did the heads flow? I just read about this build on the corral.net. Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow. 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. 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. K.S. Along with the heads, we used MAC headers for GT-40P 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. Slover primarily focused on the exhaust side of the GT40P heads. The fix: basic power upgrades for a sluggish 302 I am working on a set of iron GT40s hoping it goes faster. 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. Calculated compression to 9.8:1. In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . 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. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. After we installed the heads and with the fan off, he ran a 12.46 at 107.9. 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. check out the. GT-40P Heads - 5.0 Mustang & Super Fords Magazine - MotorTrend If you know him, ask him. Be careful, I was once bitten by one of those reptile engine builders. Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. 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! 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. At the dragstrip, we gained two-tenths and 2 mph. Well offer one as an example. The asterisk HP differences are calculated using Test 1's 294-hp peak. This is a function of the somewhat wider lobe-separation angle of 112 degrees. gt40p headers | Maverick/Comet Forums They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. Last Edit: January 18, 2015, 12:05:31 pm by businesstrader Logged shaunp. I went to a couple in Tucson and almost all the Ford vehicles that came with a 5.0 had the heads missing. Speedmaster PCE281.2046 Small Block Ford Aluminum Cylinder Heads 62cc Keywords Ill do springs and a moderate cam and go for a good, dependable power plant. SB Ford GT40P Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. 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. Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. How much HP and torque do you think I. BONUS TEST-FOUR DIFFERENT 302 INTAKES.. Its funny no one mentioned anything about ignition timing or components, Your email address will not be published. THANKS VERY MUCH! . Mustang Cylinder Head & Camshaft Guide (79-95) - LMR Its NA but makes use of AFR heads and some other aftermarket goodies. I'd get the gt40 setup, and put an s trim on it. Free shipping. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. Add 40 to 70 HP to your 302 yourself - Factory Five Racing Forum How to Get More Horsepower Out of a Ford 289 | It Still Runs United Engine and Machine sells cheap but decent pistons that will do what you're wanting. For the most part 302 heads and 351W heads are the same. Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. built one using a 91' HO short block with a set of AFR 165 heads, Weiand . 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. Small Block Ford 289/302/5.0L/351w 180cc/60cc Aluminum Cylinder Head E42004. GT40P heads, 302 and Victor Jr. intake: - Factory Five Racing Forum 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. We know what you're thinking--only two-tenths from an extra 45 hp? Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. just curious. Central Coast Mustang sells GT-40P heads at a great price, making them a viable alternative in a market flooded with performance head choices. Ford 302W / 5.0L History & Specifications - The Ranger Station Click to reveal These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. I got lucky and found a complete Explorer GT40P engine online. I'm using the Trick Flow stage 1 cam with 1.7 roller rockers. These are some of the pictures I have showing the Explorer manifolds. No-option stripper- I like strippers. 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. Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! Both swaps made more sense when parts were readily available at the bone yard for cheap. We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. FORD GT40p 4 BAR HEADS IN GOOD CONDITION w/ONE BOLT BROKEN I bought a crate 302 from Downs Ford a few years ago that was producing 320 hp. 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. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. I added a link to it. 1979 Indy 500 Pace Car. Eldelbrocks Air Gap intake manifold should work well with the combination. i'd love to use these heads,. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. GT40, GT40P, would be great factory heads. 302 GT40 Dyno Results - FourEyedPride.com 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. And remember ENGINES have been being built/rebuilt/modified for years. 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. The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. That's a good combo in my book. If they are cheap enough, take them anyway. Stock valve sizes? What Cam and Springs to Use for GT40 Heads 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. 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. We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. If I get different urges later, Ill pursue those then. If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. 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. 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. GT40P heads, what kind of performance do they give? - FourEyedPride.com how hard to put on? 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. If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. Now we know why Dennis Hilliard of Central Coast Mustang is so high on these heads. Overview. 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. For both the GT40 and GT40p heads, I STRONGLY suggest upgrading the valve springs. 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. 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. 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. This time around, we chose a shining example of this junkyard art form. - I have a 1989 f150 with a 302 5 spd. 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. 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 know a guy who used to build race engines so he has all the right tools, how much would it help to get the heads ported and polished or anything else he could do to them. Hey all, I'm working on building a 302 with my gt40p heads. The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. made more power everytwhere and 40 hp is respectable. The only one that's close, is #7. Stock 1989 5.0L HO pistons will work if you can find them. Their weak point is that the rotator used on the exhaust valve is very thick. The reason this new generation of Ford engines make a ton more power is they also enjoy fantastic cylinder heads and four valves per cylinder. LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. Build Thread 1965 Fastback Project "Racesteed". Similar to regular GT-40 heads, the biggest difference between the two is that the P-heads feature a revised spark plug angle which extends the plug into the combustion chamber, putting the flame front close to the absolute center of the chamber, resulting in a smoother combustion process. Everything fits, use the stock rockers and pushrods. For a better experience, please enable JavaScript in your browser before proceeding. Posted on May 07, 2014 by promarengine. These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. All costing in the end at least another $2k. This is just a quick overview of the changes that need to be done. Skip to main content. You didnt provide a lot of information about the engine itself, Im assuming its 85 or newer ( roller cam) May need a freshen up of the bottom end if compression is the issue. 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 multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. Well also assume that this engine is running stock exhaust manifolds. I recall having an absolute blast with my old K-code coupe back in the day. Application Fits 1979-95 Mustang 302/351 w/ OEM Small Block Ford Heads 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. this is the price for one head. 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. Through Central Coast you can have the heads fully prepped for your combination. The tube headers showed a gain of almost 100 hp! With nitrous, this is easily a mid-11-second ride. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. When building an engine there is a lot to take into consideration. With no other changes we gained 25 hp using factory iron heads. Features hardened 4140 Chromoly retainers, valve locks, spring shims, a spring height gauge, valve seals, and instructions. The 2 heads are about the same when looking at the numbers with the GT40p heads having a slight edge. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. never messed with the timing, its at 35* total . Have fun, be safe, enjoy. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 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. Theres many options available for a little more power. #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! Do not ever, ever think about using the tube type manifolds. The Fora platform includes forum software by XenForo. FORD, SMALL BLOCK 302 HO w/ E7, GT40P & GT40 - Alex's Parts The "P" heads flow better. Plus you will need to drill all the head bolt holes out as the 351W uses larger head bolts. Limited header choice is certainly a challenge. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. The specs are a conservative 212/218 degrees of duration at 0.050-inch tappet lift but offer a really nice 0.512-inch valve lift for both the intake and exhaust. There are a couple of reasons for this suggestion. (Image/Harrison Creamery). But the part about a cam replacement possibly being a labor intensive undertaking is correct. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. All manufactured using advanced CNC technology for the extreme durability and precision required of the modern canted valve Ford Small Block at power levels around the 1000 mark reached during recent competitions at the EMC and at the strip. 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. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. For additional insurance, we also added a set of ARP head studs, which are stronger and offer better thread overlap than factory bolts, which helps prevent pulling threads out of a used block. We compare the GT40s to modern cylinder heads as well as other heads from the era. Cloudflare Ray ID: 7a2e2d95dedea1e4 Mac and Ford Motorsport both make a GT40P spacific header. As noted, this is looking like hes building a 351 Lightning truck motor, which is a good way to go. I need that part number too! Smith began writing for Car Craft magazine in 1979 and became editor in 1984. I've got gt40p heads for it I'll be running, and can't afford better . Without changing the stock pistons. +1 I would go with the regular GT40 heads. Yeah, out of a bolt on upgrade, you'd probably be looking at 260-280rwhp ish with supporting mods. Holten runs the factory fan, but he had removed it when he ran the 12.63. 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. That's an improvement of 22 hp over Test 2. Then why did you port the heads and how do you know if you made an improvement. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine.