could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? At the dragstrip, we gained two-tenths and 2 mph. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . 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. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. AFR 165cc 58cc Heads. I have to agree, the GT40P heads flow better than the GT40 iron heads. 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. Save narve00 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. (its not their engine) However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. Yeah, out of a bolt on upgrade, you'd probably be looking at 260-280rwhp ish with supporting mods. Free shipping. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. No-option stripper- I like strippers. well i finally did my first ever carb build, ive always been an EFI guy Black 1985 GT: 408w, in the 6's in the 1/8 mile. I'd get the gt40 setup, and put an s trim on it. Build Thread 1965 Fastback Project "Racesteed". Because of this, your tuneup will probably need to be modified. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. The reply has so many assumptions that I cant even assume to know the answer. built one using a 91' HO short block with a set of AFR 165 heads, Weiand . When combined with modern power-makers, such as nitrous, the 302 is more than capable of producing 400+ horsepower for little more than the cost of a stock engine rebuild. I have a 5.0 from a 1992 Mustang in my 65. check out the. 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. are you twisted331 also? So . any input is apprecciated:smartass: Thank you for the info, if all I have to worry about is the plugs then I'm in good shape hahaha. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. Test 1: 750-cfm carburetor, dual-plane intake manifold, and stock camshaft. Can anyone give me a little feedback about a '99 Explorer 5.0, and tell me if it's my answer. I got lucky and found a complete Explorer GT40P engine online. 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. Here a comparison of different heads on a 302: I'm very happy with my GT40P. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. But dont think that adding a bigger camshaft will make more power. We heated the bottle to 950 psi and hit the button at 4,500 rpm. 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. 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. We also added an Edelbrock Performer RPM dual-plane intake and a set of 158-inch headers with no mufflers. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. Shop by category. this head is complete with new 1.837 int valves and 1.536 exhaust valves. Never not once have I ever seen a SBF rod bolt create a failure. Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. Those are really good numbers. That's fantastic for the minimal investment we made. $169.50. 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. Yea. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. For real performance, stock E7TE heads leave a lot to be desired. It turned out we were conservative on both counts. The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. Ive been building ENGINES for 40+ years. $139.99. Keywords Ha! You can use the stock roller lifters with any size cam you want. Not bad for off the shelf parts and a stock shortblock. Free shipping. $700.98. The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. The Edelbrock Performer RPM is a good choice, but Holley, Weiand and Ford Motorsport also have similar offerings. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. The Fora platform includes forum software by XenForo. Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. If this is beyond your technical ability, you could ask a local machine shop to perform the modifications. 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. I got a GT40P off the assembly line years ago. Mar 23, 2004. The only one that's close, is #7. HAD '82 GT monochromatic (red).black cloth HAVE Maybe I'll think about a cam swap? The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. Central Coast Mustang sells GT-40P heads at a great price, making them a viable alternative in a market flooded with performance head choices. For both the GT40 and GT40p heads, I STRONGLY suggest upgrading the valve springs. There are a couple of reasons for this suggestion. They also have emissions legal heads as well. In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . Keep in mind that swapping camshafts is a fairly extensive effort. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. With the P-heads requiring pedestal-mount rockers, we also called up Crane Cams for a set of 1.6 pedestal-mount roller rockers. the engine is carburated of that makes a difference. This is not a criticism but instead consider it to be more of a heads-up. Ive bought wrecking yard SBFs and put 20 lbs of boost to them and spin them to 7000 and made 500 HP with several of them. It runs smooth but seems lazy. With no other changes we gained 25 hp using factory iron heads. 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. Some ideas never go out of style. A forum community dedicated to Ford Mustang owners and enthusiasts. They were located in Tahachapi CA, and were sold with upgraded springs for $650.00, back in 2002-2003 ish. Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. 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. Very true about finding them at the local yards. 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. Location: Re: Stock Ford 351W 4bbl dyno numbers. Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. The GT40P heads flow a lot better than stock 351 heads. thats after 3 hours of idling/midrange hits to tune the idle and part throttle . I was looking at putting on the GT40P heads on. 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. 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. Cloudflare Ray ID: 7a2e2d95dedea1e4 I added a link to it. The kit offers adjustable power from 50 to 250 hp with a simple jet change. 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. Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. The factory heads have a boss for the exhaust valve that restricts flow through the exhaust port. LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? I am working on a set of iron GT40s hoping it goes faster. 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. Those heads were unported and had stock valve sizes! So I've got the motor and heads already for my maverick project. This is the main reason why these engines are not modified as much as the small block Chevy. 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. 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. 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. With. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. The Fora platform includes forum software by XenForo. Early Windsors tend to have fairly restrictive exhaust manifolds, making the addition of a set of headers that much more efficient. I had those on my car before I upgraded and they were nice heads. Now we know why Dennis Hilliard of Central Coast Mustang is so high on these heads. 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. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. 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. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 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. 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. 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. Yes- thank you. '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
It's an 86 roller 5.0 engine that had a recent rebuild sometime in the past with keith black pistons, otherwise stock. The gt40p head is considered the best OEM 302 head made. Because of this, your tuneup will probably need to be modified. 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. This is an older thread, you may not receive a response, and could be reviving an old thread. You can email the site owner to let them know you were blocked. just curious. When building an engine there is a lot to take into consideration. Be careful, I was once bitten by one of those reptile engine builders. 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 Fora platform includes forum software by XenForo. I'll prob take a trip up there this weekend after scavenging the junkyards, thanks a million. SB Ford GT40 Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. Many years ago, a friend bought a used 2001 Mercury Mountaineer 5.0L that was equipped with a set of really decent GT40P style iron heads. Obviously, tuneups will vary. Step 1. Instructions on porting the GT-40p heads here. BONUS TEST-FOUR DIFFERENT 302 INTAKES.. The action you just performed triggered the security solution. Features hardened 4140 Chromoly retainers, valve locks, spring shims, a spring height gauge, valve seals, and instructions. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! 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. 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. K.S. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. I need that part number too! These are some of the pictures I have showing the Explorer manifolds. This engine will be good for your 65 Mustang. All costing in the end at least another $2k. The 2 heads are about the same when looking at the numbers with the GT40p heads having a slight edge. 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. The hardest part of swapping the cam was just getting the timing cover off and back on again. how much HP and torque? 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. For all of us interested in Gt40p heads. Im a different animal. 68 XR7 & 68 M-100. #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! 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. 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. Over $2050 for the 165/185 renegades. They work, but present their own challenges. If you dont feel comfortable doing this higher a pro. 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. I am very happy too. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors.