So . These are a great head but do need some machining mods to make they really work well. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. GT 500; Posts: 8496; Location: Brisbane . For a better experience, please enable JavaScript in your browser before proceeding. gt40p headers | Maverick/Comet Forums Consider having the head's intake ports matched to the intake manifold gasket. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 A LOT of them do it these days. GT40P Heads how much hp from them. - StangNet 351W D0OE-C heads better than GT40P\'s? - Ford Muscle Cars Tech Forum Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow. Dyno results GT40P heads | Vintage Mustang Forums A forum community dedicated to Ford performance owners and enthusiasts. I'm wondering how these heads will interact with the paxton 1220 sl supercharger I'm trying to put on. 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. Holten runs the factory fan, but he had removed it when he ran the 12.63. - I have a 1989 f150 with a 302 5 spd. Best of all, no machining is required to install these on your stock cast iron heads! 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. LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? Weiand 7515 xcellerator intake. These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. Ford's seminal 302 engine (later re-dubbed the 5.0) has been popular with budget-minded hot rodders for decades. This engine will be good for your 65 Mustang. Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1.7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. On slicks the car went some low 7.70s right at 90mph. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. Performance & security by Cloudflare. 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. If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. This is an older thread, you may not receive a response, and could be reviving an old thread. Your IP: It's an 86 roller 5.0 engine that had a recent rebuild sometime in the past with keith black pistons, otherwise stock. This test went so well that we were eager to see what the slightly bigger cam would do. We heated the bottle to 950 psi and hit the button at 4,500 rpm. Car Craft mag. Mustang Cylinder Head & Camshaft Guide (79-95) - LMR Building a 302-inch small-block to produce 400 hp is really no big deal, but doing. Im now thinking of adding a cam to match the carb. 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. All costing in the end at least another $2k. This is just a quick overview of the changes that need to be done. It's a classic move we've pulled off many times. Im a different animal. They almost seem like flywheel numbers rather than RWHP numbers. Also, you'll need to get a steel distributor gear to replace the iron gear that is currently on your distributor. Here a comparison of different heads on a 302: I'm very happy with my GT40P. Related Resources Mustang Generation Nicknames: What Do They Mean? AFR 165cc 58cc Heads. Every thing he tells you on this site is true. A forum community dedicated to Ford Mustang owners and enthusiasts. Depending on the Headers you have you might be okay. Tim's junkyard refugee survived the beating and we had a bitchin' story. I guess I had it backwards, sorry about that, didn't mean to spread misinformation. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. 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. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. You can have your current 28 oz rebalanced to 50. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. Purchase any used aftermarket manifold for the 302 that is designed to function in the 3,500 to 6,500 power band. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? I'll prob take a trip up there this weekend after scavenging the junkyards, thanks a million. However I think the opportunity window is slowly closing. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . 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. 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. Their weak point is that the rotator used on the exhaust valve is very thick. will gt40p heads fit on a 302 | Ford Mustang Forum There are caveats to this plan, however. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. 351W with GT40P heads? | Mercury Cougar Owners T5z and 3.89 9" TL rear. Click to reveal This 1979-1995 Mustang cylinder head and camshaft guide will overview the heads and cams we offer and how they will coincide. There was an article in Hot Rod magazine in the mid '80's where Jon Kaase was developing 351w packages. Test 1: 750-cfm carburetor, dual-plane intake manifold, and stock camshaft. Have fun, be safe, enjoy. Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. The valve seats have been cut on a . '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 I have a 302 Windsor V8 EFI engine that I converted to a 600 cfm carburetor with a Street Warrior intake manifold. If you wanted to make your engine feel strong, these would be a decent investment, but they will require some modifications. JavaScript is disabled. 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! 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. A trip to Orlando Speed World provided us with updated quarter-mile times. We gained 45 hp and 40 lb-ft of torque. 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. 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. Good on ya Jeff Smith. 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. There are literally a dozen or so camshaft companies that offer a mild hydraulic roller cam for a 5.0L Ford. The Fora platform includes forum software by XenForo. Instructions on porting the GT-40p heads here. 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. Here is my setup. No-option stripper- I like strippers. 1.7 shaft rockers and beehives. ***Most important is theStupid question is the one that was never asked!*** No-option stripper- I like strippers. $169.50. 1996-2001 Ford Explorer 5.0L V8 Specifications Within a few hours of his discovery, the engine was sitting in the back of his truck on its way to a new home. The tube headers showed a gain of almost 100 hp! 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. +1 I would go with the regular GT40 heads. I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. Depends on the budget. hole size 302 is 7/16 and 351 is 1/2 We've already been motivated to put this engine in a buddy's Mustang. $700.98. The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. 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. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. For a better experience, please enable JavaScript in your browser before proceeding. We set the timing to 34 degrees and rejetted the carburetor to get our desired 12.5:1 air/fuel ratio. Torque on the other hand isnt something to write home about. However, stepping up in the performance head market will set you back more than $1,200 for a decent pair of aluminum castings--and that's straight out of the box, with no porting. 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. Nice to see actual dyno results instead of "butt dyno" guesses. They were located in Tahachapi CA, and were sold with upgraded springs for $650.00, back in 2002-2003 ish. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. GT40P heads, what kind of performance do they give? On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. We turned to Rare Auto Design in Orlando for dyno tests to find out how much horsepower we gained. 99 Explorer engine (302) with GT40P heads - Ford Muscle Cars Tech Forum You could run a thinner head gasket as well. 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. I added a link to it. Compare. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. Don't let the fact that the iron GT40 heads have a larger exhaust valve fool you. I went to a couple in Tucson and almost all the Ford vehicles that came with a 5.0 had the heads missing. Very true about finding them at the local yards. $700.98. With the P-heads requiring pedestal-mount rockers, we also called up Crane Cams for a set of 1.6 pedestal-mount roller rockers. This will cost additional money but is still worth it, in our opinion. 331/347 stroker w/gt40p's, waste?Hp?cost involved? - Maverick
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