These are a great head but do need some machining mods to make they really work well. 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. 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. I'm an old school guy (289 in 65 mustang), and I'm just looking into the new 5.0 engine (roller cam) stuff recently. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. Anythoughts? Just got through porting one of my gt40p heads today. They were located in Tahachapi CA, and were sold with upgraded springs for $650.00, back in 2002-2003 ish. Here is the lowdown on exhaust manifolds and VALVE SPRINGS. $700.98. We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. Mac and Ford Motorsport both make a GT40P spacific header. The spark plug issue is almost a non-issue. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. If I get different urges later, Ill pursue those then. 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 can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. 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. Im a different animal. The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. I got a GT40P off the assembly line years ago. '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 (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. Both swaps made more sense when parts were readily available at the bone yard for cheap. Ford Factory 5.0 Performance Cylinder Heads. Definitely going to use my P heads. this head is complete with new 1.837 int valves and 1.536 exhaust valves. Theres many options available for a little more power. That's fantastic for the minimal investment we made. Within a few hours of his discovery, the engine was sitting in the back of his truck on its way to a new home. T5 with 3.73s. 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. The cost of a new set of standard replacement roller lifters is very affordable at major retailers like Summit. 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. I must agree with Jeff Smith. Ill do springs and a moderate cam and go for a good, dependable power plant. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. Best of all, no machining is required to install these on your stock cast iron heads! First, adding headers will improve power on the existing combination. Once the headers are in place, then you can consider if you still want more power. The factory heads have a boss for the exhaust valve that restricts flow through the exhaust port. 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. 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. The MPH was there to run a little better but the local track is about terrible. That's an improvement of 22 hp over Test 2. Small Block Ford 289/302/5.0L/351w 180cc/60cc Aluminum Cylinder Head E42004. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. 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. However I think the opportunity window is slowly closing. 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. Now we know why Dennis Hilliard of Central Coast Mustang is so high on these heads. Joined: Sun Mar 15, 2009 9:31 am. I have managed to get 402 horse power from a 289 hipo natural aspirated. Posted on May 07, 2014 by promarengine. 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. I got lucky and found a complete Explorer GT40P engine online. Well offer one as an example. Gt40 heads/intake from a jy explorer, leave the . Yea. SB Ford GT40P Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. The kit offers adjustable power from 50 to 250 hp with a simple jet change. 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. Thank You. At the dragstrip, we gained two-tenths and 2 mph. $139.99. Rowe studied engineering, philosophy and American literature at Central Florida Community College. Compare. For the first test, we were reusing the stock Explorer cam, so the engine didn't need any break-in time. how hard to put on? Shop by category. ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. Shop by category. - I have a 1989 f150 with a 302 5 spd. The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. PTP Engineering front suspension and 25540R17s all around. 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. The car weighs #2835 with driver. 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. Stock valve sizes? I'd get the gt40 setup, and put an s trim on it. 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). Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. . If you dont feel comfortable doing this higher a pro. I have a very good running stock 1981 302 in a F100 short box. Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. They almost seem like flywheel numbers rather than RWHP numbers. This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. Can I run the new cam with the same roller hydraulic lifters or do I have to change the lifters too? A forum community dedicated to Ford performance owners and enthusiasts. Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. No-option stripper- I like strippers. This combination should be good for about 400 horsepower and as much as 500 if you opt to use the stronger aftermarket pistons. What you are trying to do is to increase the amount of airflow through the engine in order to make more power. Not sure how they would mate up to your existing exhuast, but otherwise they should work. Along with the heads, we used MAC headers for GT-40P heads. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. I'm 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. The SUV indicated barely 120,000 on the clock, and after yanking the valve covers to judge the engine's condition, Tim Moore instantly made the decision to do the boneyard version of a smash-and-grab. Very true about finding them at the local yards. Everything fits, use the stock rockers and pushrods. The only one that's close, is #7. With. Learn how your comment data is processed. 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. 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. Skip to main content. The Fora platform includes forum software by XenForo. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. I have a 302 Windsor V8 EFI engine that I converted to a 600 cfm carburetor with a Street Warrior intake manifold. Compare. 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. 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. This is needed for the steel roller cam. I view the GT40P heads similar to Granada brakes. made more power everytwhere and 40 hp is respectable. Plus you will need to drill all the head bolt holes out as the 351W uses larger head bolts. Win or lose, if you buy the ticket you must take the ride. 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. 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. If this is beyond your technical ability, you could ask a local machine shop to perform the modifications. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. Its funny no one mentioned anything about ignition timing or components, Your email address will not be published. It runs smooth but seems lazy. If you have a early 351W ie pre 76 it probably . 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. Compare. 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. Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. JavaScript is disabled. I don't need tons of power to enjoy the car. 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. GT40P heads, what kind of performance do they give? T5z and 3.89 9" TL rear. The heads that were used were also old C8 casting with 58cc chambers. 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. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. Test 3: Installed the larger Lunati camagain, no other changes. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. For real performance, stock E7TE heads leave a lot to be desired. Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. i have a 302 engine from a 1977 granada and i am wondering if gt40p heads from an explorer will fit on this motor. Location: Re: Stock Ford 351W 4bbl dyno numbers. They work, but present their own challenges. This is not a criticism but instead consider it to be more of a heads-up. 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 We did a quick search for hydraulic roller cams and landed on a COMP camshaft that looked promising. A bone stock 2bbl early 351w with stock replacement forged pistons (9.0 compression) and dyno headers made 211 Hp . You could run a thinner head gasket as well. 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. 1 - 7 of 7 Posts. I got a set of AFR heads , night and day. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! 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. fuel injection system . In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . 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. HAD '82 GT monochromatic (red).black cloth HAVE .. i would not buy valves unless you need them amd would not switch to studs with these heads for your low hp . Because of this, your tuneup will probably need to be modified. The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. 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:?:!?!?!? The valve seats have been cut on a . However there are plenty of factory heads that with the help of an experienced machine shop can be great. I'm also have the regular GT40 heads on my current build.
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