I'm using the Trick Flow stage 1 cam with 1.7 roller rockers. 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. I'd much rather be able to drive it at 8 or 9/10s of what it can handle. 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. 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. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. Within a few hours of his discovery, the engine was sitting in the back of his truck on its way to a new home. 99 Explorer engine (302) with GT40P heads - Ford Muscle Cars Tech Forum I had a set of 69 302 heads I ran for a while . 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. 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 Free shipping. I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. HAD '82 GT monochromatic (red).black cloth HAVE This is a function of the somewhat wider lobe-separation angle of 112 degrees. LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? I'd get the gt40 setup, and put an s trim on it. We are offering a pair of original Ford Cobra 5.0 GT40 cast iron cylinder heads. check out the. #3::: Do your homework,get quality parts,dont skimp. are you twisted331 also? I had those on my car before I upgraded and they were nice heads. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. Fastest e303 5.0l's? - FourEyedPride.com This will cost additional money but is still worth it, in our opinion. HiPo manifolds and Ill be good. You'll have to plug the oil hole that is in the engine from the old oil dipstick. Do not ever, ever think about using the tube type manifolds. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. 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. 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. 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. This is what I recommend to everyone who is doing a budget 5.0 build. Someone does make the Tri-Y's headers for the early Mustangs using the "P" heads. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS. 302 GT40 Dyno Results - FourEyedPride.com The fix: basic power upgrades for a sluggish 302 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. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 SBF OEM | eBay Motors, Parts & Accessories, Car & Truck Parts & Accessories | eBay! The only one that's close, is #7. Slover primarily focused on the exhaust side of the GT40P heads. Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. . I have a 66 mustang with its original untouched 289 with over 140 k on it that Ive been running a blow thru turbo making 14 lbs of boost on for the last 5 years and its never given me a problem. GT40Ps have 58cc. 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. I spin it to 6500 and thats about it. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. 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. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. JEGS High Performance. You can have your current 28 oz rebalanced to 50. How much HP and torque do you think I. I'm sure the dyno operator used some goofball correction factor to make the numbers look higher. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. If you wanted to make your engine feel strong, these would be a decent investment, but they will require some modifications. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. Ford Factory 5.0 Performance Cylinder Heads. Instructions on porting the GT-40p heads here. fuel injection system . The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. Performance & security by Cloudflare. 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. Nice to see actual dyno results instead of "butt dyno" guesses. The hardest part of swapping the cam was just getting the timing cover off and back on again. I got rid of the carburetor and went with a F.A.S.T. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. JavaScript is disabled. I turned it because it was tired when I got it. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. First, adding headers will improve power on the existing combination. 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. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. 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. Theres many options available for a little more power. I was looking at putting on the GT40P heads on. With the GT-40P heads you will need to back off the timing a couple degrees and bump up the fuel pressure. Max hp out of gt 40 heads | Mustang Evolution Forum That's a good combo in my book. Never not once have I ever seen a SBF rod bolt create a failure. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. 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. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. 302 heads on 351w | ClassicBroncos.com Forum Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. You just want to keep it out of detonation. We compare the GT40s to modern cylinder heads as well as other heads from the era. The valve seats have been cut on a . We did a quick search for hydraulic roller cams and landed on a COMP camshaft that looked promising. There is a better way. The GT40 & GT40P heads had a few differences that are note-worthy, the most importantly being the bump in compression. Holley 670 street avenger carb. 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. Compare. Most of them are aware of what changes need to be completed. . He has worked as a tractor-trailer driver and mechanic, a rigger at a fire engine factory and as a race-car driver and builder. Gasoline/Diesel all makes on earth & still doing it today with great pride.Feel free to contact me anytime. As with all head installations, check piston-to-valve clearance before final startup. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. Pretty sure that was name, but I could be wrong. Speedmaster PCE281.2046 Small Block Ford Aluminum Cylinder Heads 62cc SB Ford GT40P Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. The asterisk HP differences are calculated using Test 1's 294-hp peak. Thank You. 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. GT40P heads, what kind of performance do they give? - FourEyedPride.com FORD GT40p 4 BAR HEADS IN GOOD CONDITION . A trip to Orlando Speed World provided us with updated quarter-mile times. The engine was only rated at 215 hp, but it at least had 9.0:1 compression. +1 I would go with the regular GT40 heads. You can email the site owner to let them know you were blocked. The heads got a 3 angle valve job, new valves from speed-pro and all the valve train was from crane that matched the current hydraulic cam. I don't need tons of power to enjoy the car. Test 2: Changed to the smaller of the two Lunati camshaftsno other changes. (Please note these are not GT40P Explorer heads). GT40P heads, what kind of performance do they give? After graduating from Iowa State University with a journalism degree in 1978, he combined his two passions: cars and writing. 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. Can I run the new cam with the same roller hydraulic lifters or do I have to change the lifters too? Also, you'll need to get a steel distributor gear to replace the iron gear that is currently on your distributor. However, since Holten's car has an E303 cam, we didn't want the pistons and valves becoming too close, so we chose the 1.6 rockers. Depends on the budget. 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. Ask Away! with Jeff Smith: Camshaft and Cylinder Head Recommendations 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. at the crank. We know what you're thinking--only two-tenths from an extra 45 hp? However I think the opportunity window is slowly closing. 302HO with gt40p heads | Mustang Forums at StangNet You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. made more power everytwhere and 40 hp is respectable. Small-block Fords and Mopars only use four head bolts per cylinder, so retaining proper head-gasket sealespecially with nitrousis a point that demands attention, so we ordered a set of Fel-Pro MLS head gaskets rather than a standard, composition gasket. anyone have experience with GT40P heads on a 92 351W Through Central Coast you can have the heads fully prepped for your combination. Its NA but makes use of AFR heads and some other aftermarket goodies. Install a set of 1.7:1 roller-tipped rocker arms on the heads. 02-11-2012, 07:16 PM #6 fiveoh 86lx VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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. Manual trans. Late-model ford GT40 and GT40P heads with 1.84-inch intake valves will also flow 185 cfm at 0.50 . For a better experience, please enable JavaScript in your browser before proceeding. Definitely going to use my P heads. But what we were most impressed with was the solid gain in torque over the smaller Voodoo cam from 3,500 and up. 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.
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