302 with gt40p heads horsepower
this is the price for one head. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Free shipping. Keywords In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. These engines came with the GT40P head, which even with its small valves, offers really good performance. 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. $169.50. Plus you will need to drill all the head bolt holes out as the 351W uses larger head bolts. The Fora platform includes forum software by XenForo. Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. That's fantastic for the minimal investment we made. Anyways, I know the gt40ps will bump . There is a better way. 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. Not sure how they would mate up to your existing exhuast, but otherwise they should work. You should be able to get away with a 150 to 200 horsepower shot later, but it's best to start out small and work up. Ford Factory 5.0 Performance Cylinder Heads. Keep in mind that swapping camshafts is a fairly extensive effort. After we installed the heads and with the fan off, he ran a 12.46 at 107.9. I'm running BBK un-equal length shorty's, and I'm able to get all the plugs in, tight, and all plug wires on. Not looking for crazy HP. 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. Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. Just make sure it is a roller cam. GT40Ps have 58cc. It's a classic move we've pulled off many times. 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! 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. Over $2050 for the 165/185 renegades. That's a good combo in my book. In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . Click to reveal Theres many options available for a little more power. Its NA but makes use of AFR heads and some other aftermarket goodies. 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. - I have a 1989 f150 with a 302 5 spd. 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. I wouldnt recommend reusing lifters though. Im now thinking of adding a cam to match the carb. I'd get the gt40 setup, and put an s trim on it. A bone stock 2bbl early 351w with stock replacement forged pistons (9.0 compression) and dyno headers made 211 Hp . What did the heads flow? A solid 300-325 hp should be plenty and that's with good drivability and reliability as well. An aggressive cam will wake it up a bit. Stock valve sizes? FULL DYNO RESULTS. This is what I recommend to everyone who is doing a budget 5.0 build. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. The GT40P cylinder heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. But dont think that adding a bigger camshaft will make more power. They were located in Tahachapi CA, and were sold with upgraded springs for $650.00, back in 2002-2003 ish. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS. 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. check out the. Skip to main content. 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. Also, the spark plug angle makes it a pain. United Engine and Machine sells cheap but decent pistons that will do what you're wanting. Now he serves as a regular contributor to OnAllCylinders. If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. 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. With the P-heads requiring pedestal-mount rockers, we also called up Crane Cams for a set of 1.6 pedestal-mount roller rockers. I got lucky and found a complete Explorer GT40P engine online. I have a 302 Windsor V8 EFI engine that I converted to a 600 cfm carburetor with a Street Warrior intake manifold. These are Ford iron GT-40P heads. The action you just performed triggered the security solution. 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. #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. 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. Limited header choice is certainly a challenge. Over $2050 for the 165/185 renegades. Runs well. Cant wait to try um out. 1.7 shaft rockers and beehives. how hard to put on? Calculating pushrod length ***Most important is theStupid question is the one that was never asked!*** I added a link to it. The combination of this cam with your intake and headers will produce a very nice street engine. Where they differ is the combustion chamber size. Compare. Buy the lifters for peace of mind now and hopefully for the duration. 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. Both swaps made more sense when parts were readily available at the bone yard for cheap. Performance & security by Cloudflare. Using the manufacturer recommended springs for your camshaft are a safe bet. 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. Paying a premium for a set of GT40P heads or dumping money into some to get their performance to rival aftermarket is not for me. 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. Calculated compression to 9.8:1. people can stop saying that adding aftermarket cam with stock heads is a waste of time. Never not once have I ever seen a SBF rod bolt create a failure. This time around, we chose a shining example of this junkyard art form. This combination should be good for about 400 horsepower and as much as 500 if you opt to use the stronger aftermarket pistons. Depending on the Headers you have you might be okay. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. With the GT-40P heads you will need to back off the timing a couple degrees and bump up the fuel pressure. A forum community dedicated to Ford Mustang owners and enthusiasts. Headers and a camshaft will help but the engine really needs aftermarket 3/8 inch connecting rod bolts and aftermarket cylinder heads. Their weak point is that the rotator used on the exhaust valve is very thick. Once the headers are in place, then you can consider if you still want more power. I have managed to get 402 horse power from a 289 hipo natural aspirated. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. 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. The entire front accessory drive and timing chain cover must be removed, along with the distributor and intake manifold. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. Boy, were we surprised with the results. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. Im a different animal. This is not a criticism but instead consider it to be more of a heads-up. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. If you know him, ask him. Win or lose, if you buy the ticket you must take the ride. Late-model ford GT40 and GT40P heads with 1.84-inch intake valves will also flow 185 cfm at 0.50 . Features hardened 4140 Chromoly retainers, valve locks, spring shims, a spring height gauge, valve seals, and instructions. Yea. Test 2: Changed to the smaller of the two Lunati camshaftsno other changes. 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. . I'd much rather be able to drive it at 8 or 9/10s of what it can handle. . They almost seem like flywheel numbers rather than RWHP numbers. Most of them are aware of what changes need to be completed. The engine never huffed oil out of the breathers, and the spark plugs all looked excellent. I view the GT40P heads similar to Granada brakes. I'm sure the dyno operator used some goofball correction factor to make the numbers look higher. I had those on my car before I upgraded and they were nice heads. This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. Really hurt too. Compare. The Edelbrock Performer RPM is a good choice, but Holley, Weiand and Ford Motorsport also have similar offerings. 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. 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. We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. Those are really good numbers. 1986 Short block with notched pistons. .. i would not buy valves unless you need them amd would not switch to studs with these heads for your low hp . The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. 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. GT40s have 64cc chambers. thats after 3 hours of idling/midrange hits to tune the idle and part throttle . Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. A good port job can set you back another $500-$1,000. For this reason, we're not sure what kind of boost the GT-40P heads will give. For a better experience, please enable JavaScript in your browser before proceeding. 02-11-2012, 07:16 PM #6 fiveoh 86lx The Fora platform includes forum software by XenForo. FORD GT40p 4 BAR HEADS IN GOOD CONDITION . Posted on May 07, 2014 by promarengine. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. 1 - 7 of 7 Posts. Free shipping for many products! Mac and Ford Motorsport both make a GT40P spacific header. JavaScript is disabled. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? JavaScript is disabled. And have discovered something that I dont think anyone else knows. First, adding headers will improve power on the existing combination. You didnt mention what camshaft you would be choosing or exactly which 5.0L Ford Windsor engine you are working with. What you are trying to do is to increase the amount of airflow through the engine in order to make more power. Early Windsors tend to have fairly restrictive exhaust manifolds, making the addition of a set of headers that much more efficient. For 2018, the Coyote makes 460 hp. For a better experience, please enable JavaScript in your browser before proceeding. You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. This is a function of the somewhat wider lobe-separation angle of 112 degrees. I am working on a set of iron GT40s hoping it goes faster. That said there are some better aftermarket options for heads also. We turned to Rare Auto Design in Orlando for dyno tests to find out how much horsepower we gained. I don't need tons of power to enjoy the car. If I get different urges later, Ill pursue those then. Now we know why Dennis Hilliard of Central Coast Mustang is so high on these 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 $700.98. I turned it because it was tired when I got it. You can use the stock roller lifters with any size cam you want. HAD '82 GT monochromatic (red).black cloth HAVE 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. One benefit gt40P head will have over other 80's-90's model heads, including the gt40 head, is that it has a smaller combustion chamber much like the original 289 heads. The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. The GTp heads are like GT 40's with smaller combustion chambers and the spark plugs are relocated for a more efficient burn. 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. 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. We compare the GT40s to modern cylinder heads as well as other heads from the era. Well assume it is a 5.0L with stock heads. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. We decided on a Powerstar kit from Nitrous Supply, owned by our good friend Mike Thermos, who was one of the original nitrous kit suppliers back in the early '80s. Build Thread 1965 Fastback Project "Racesteed". Ported Hurricane Single Plane and custom 750 HP. 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. The valve seats have been cut on a . Definitely going to use my P heads. 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. Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. For all of us interested in Gt40p heads. Nice to see actual dyno results instead of "butt dyno" guesses. 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. Not bad for off the shelf parts and a stock shortblock. 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. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. 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. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. I just read about this build on the corral.net. Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. That's an improvement of 22 hp over Test 2. Pretty sure that was name, but I could be wrong. Here is the lowdown on exhaust manifolds and VALVE SPRINGS. 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. Ford's seminal 302 engine (later re-dubbed the 5.0) has been popular with budget-minded hot rodders for decades. Your email address will not be published. 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. 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. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. Scorpion 1.6 roller rockers. 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. 1983 Mustang G.T. 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. T5 with 3.73s. 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. #3::: Do your homework,get quality parts,dont skimp. Central Coast Mustang sells GT-40P heads at a great price, making them a viable alternative in a market flooded with performance head choices. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . 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. This will cost additional money but is still worth it, in our opinion. They also have emissions legal heads as well. 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:?:!?!?!? Everything fits, use the stock rockers and pushrods. You didnt mention which cam you had in mind. 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. 302 explorer short block with roughly 80k miles GT40's from a local u pull n pay ($97) weiand x-celerator trick flow stage 1 cam 650 holley double pumper car made 322/329 SAE . And agree the cams do help and a few tricks with the heads that I have discovered really make a difference. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. Well also assume that this engine is running stock exhaust manifolds. 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 can email the site owner to let them know you were blocked. I have a 5.0 from a 1992 Mustang in my 65. Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. (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 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. Thanks. For the cherry on top of this Blue Oval desert, we bolted Mike Thermos' simple Powerstar plate nitrous system under the carburetor, installed the 140-hp jets (55 fuel and 55 nitrous), and used the trigger to retard the timing on the MSD ignition by 8 degrees. Because of this, your tuneup will probably need to be modified. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. 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. I'm wondering how these heads will interact with the paxton 1220 sl supercharger I'm trying to put on. I got lucky and found a complete Explorer GT40P engine online. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. SB Ford GT40P Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. Obviously, tuneups will vary. Without changing the stock pistons. hole size 302 is 7/16 and 351 is 1/2 With. We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. How much HP and torque do you think I. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. I got rid of the carburetor and went with a F.A.S.T. *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. 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. 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. I am very happy too. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. 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. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. For real performance, stock E7TE heads leave a lot to be desired. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. This 1979-1995 Mustang cylinder head and camshaft guide will overview the heads and cams we offer and how they will coincide. Don't let the fact that the iron GT40 heads have a larger exhaust valve fool you. Learn how your comment data is processed. Step 2. Ive been building ENGINES for 40+ years. 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! If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. 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. Sponsored. 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. The only one that's close, is #7. I got a GT40P off the assembly line years ago. Dec 8, 2011. $700.98. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. I'll prob take a trip up there this weekend after scavenging the junkyards, thanks a million. The spark plug issue is almost a non-issue. I must agree with Jeff Smith. 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. I have been working on Fords for 40 years and I have experimented with a few tricks of my own. Eldelbrocks Air Gap intake manifold should work well with the combination. I have a very good running stock 1981 302 in a F100 short box. Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! Step 1. The headers will improve this airflow throughout the entire rpm rangeadding more torque and horsepower. Here is my setup. The MPH was there to run a little better but the local track is about terrible. That's more than enough to feed a power-brake booster. Rowe studied engineering, philosophy and American literature at Central Florida Community College. That's a 40 per cent increase in power from a simple head and cam swap, and one seriously happy Mustang owner! MAC is the only manufacturer of these headers, and the parts we installed fit like a glove with no problems whatsoever. All this is worth it. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. 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. 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 took him and yours truly eight hours from start to finish, using air tools and a lift to gain access to the header flanges. 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. Through Central Coast you can have the heads fully prepped for your combination. You can have your current 28 oz rebalanced to 50. Best of all, no machining is required to install these on your stock cast iron heads! JavaScript is disabled. These are a great head but do need some machining mods to make they really work well. The reason for this is that we're actually replacing mildly worked E7TE heads. 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. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. Compare. 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. that is a healthy budget deal. Even with a stock Mustang 5.0 cam makes good power. I can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. If you have a early 351W ie pre 76 it probably .
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