There was an article in Hot Rod magazine in the mid '80's where Jon Kaase was developing 351w packages.
FORD GT40p 4 BAR HEADS IN GOOD CONDITION w/ONE BOLT BROKEN You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. I got lucky and found a complete Explorer GT40P engine online.
GT40 Heads On A 289? | Ford Muscle Cars Tech Forum The GT40 & GT40P heads had a few differences that are note-worthy, the most importantly being the bump in compression. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. The asterisk HP differences are calculated using Test 1's 294-hp peak.
FORD, SMALL BLOCK 302 HO w/ E7, GT40P & GT40 - Alex's Parts That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. I got lucky and found a complete Explorer GT40P engine online. These are Ford iron GT-40P heads. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. I had a set of 69 302 heads I ran for a while . That's a good combo in my book. 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. However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. With nitrous, this is easily a mid-11-second ride. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! On slicks the car went some low 7.70s right at 90mph. 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! Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous.
351W D0OE-C heads better than GT40P\'s? - Ford Muscle Cars Tech Forum Central Coast Mustang sells GT-40P heads at a great price, making them a viable alternative in a market flooded with performance head choices. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. bmcdaniel, Feb 17, 2004 #7. v8maverick Member. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . Thank You. Also, the spark plug angle makes it a pain. The only way to really make more power is to go with a stroker kit, blower and/or heads. You can have your current 28 oz rebalanced to 50.
What Are The GT40 & GT40P Heads? - LMR.com people can stop saying that adding aftermarket cam with stock heads is a waste of time.
Ford 302W / 5.0L History & Specifications - The Ranger Station Hey Motorheadty,Like your comments,question for ya,I have a 92 convertible,just bought a 5.0 out of a 94 gt that was just freshened up top end,gt40p heads w/new springs etc for the new E303 cam,new FRP roller lifters,Crane 1.7 rockers,hardened push rods,double roller timing set,all put on a bottom end w/104000 miles,needless to say previous owner pulled said engine after 800 miles and now building a 351,I pulled engine down my machinest,putting forged internals in and bolting everything back together,I want to run about a 150 shot N2o,and iam going carb,wondering which intake would be best w/the 150 shot,heard that dual planes might not be the way to go? Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! 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. The GTp heads are like GT 40's with smaller combustion chambers and the spark plugs are relocated for a more efficient burn. 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. LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? 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. It runs smooth but seems lazy. For 2018, the Coyote makes 460 hp. Test 1: 750-cfm carburetor, dual-plane intake manifold, and stock camshaft. Late-model ford GT40 and GT40P heads with 1.84-inch intake valves will also flow 185 cfm at 0.50 . If I get different urges later, Ill pursue those then. 950.00 us a set and will ship . I got a GT40P off the assembly line years ago. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you.
You need to check.
351W with GT40P heads? | Mercury Cougar Owners Keep in mind that swapping camshafts is a fairly extensive effort. You can use the stock roller lifters with any size cam you want. 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. You didnt mention which cam you had in mind. Obviously, tuneups will vary. Learn how your comment data is processed. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. Free shipping. Check my post above.
87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 A bit of info for those looking to build 300+hp 5.0L/302s We are offering a pair of original Ford Cobra 5.0 GT40 cast iron cylinder heads. I view the GT40P heads similar to Granada brakes. No-option stripper- I like strippers. I have to agree, the GT40P heads flow better than the GT40 iron heads. Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow.
Gt40p heads - FourEyedPride.com You can email the site owner to let them know you were blocked. This combination should be good for about 400 horsepower and as much as 500 if you opt to use the stronger aftermarket pistons. What would be the best cam and springs to use for these heads in a 302 Windsor? #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! HAD '82 GT monochromatic (red).black cloth HAVE They suffered from poor aftermarket support up until about 15 years ago when it really came on strong. AFR 165cc 58cc Heads. 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. Ford Factory 5.0 Performance Cylinder Heads. We also added an Edelbrock Performer RPM dual-plane intake and a set of 158-inch headers with no mufflers. GT40P heads, what kind of performance do they give? A COMP hydraulic roller cam we found works well with this combination. Slover primarily focused on the exhaust side of the GT40P heads. Theres many options available for a little more power. 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. that is a healthy budget deal. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. 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. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 SBF OEM | eBay Motors, Parts & Accessories, Car & Truck Parts & Accessories | eBay! Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. This will cost additional money but is still worth it, in our opinion. The only one that's close, is #7. Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1.7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. 69.90.139.244 The GT40P heads flow a lot better than stock 351 heads.
How to Build a Cheap Drag Racing 302 Ford Motor | It Still Runs 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. 02-11-2012, 07:16 PM #6 fiveoh 86lx 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. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. The engine never huffed oil out of the breathers, and the spark plugs all looked excellent. If this is beyond your technical ability, you could ask a local machine shop to perform the modifications. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. Can I run the new cam with the same roller hydraulic lifters or do I have to change the lifters too? Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. . (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. If you know him, ask him. I don't need tons of power to enjoy the car. +1 I would go with the regular GT40 heads. It's an 86 roller 5.0 engine that had a recent rebuild sometime in the past with keith black pistons, otherwise stock. Works on all factory cast iron E7, GT40, and GT40P cylinder heads! And have discovered something that I dont think anyone else knows. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. These are a great head but do need some machining mods to make they really work well. 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. 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. If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. 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. Anyways, I know the gt40ps will bump . Not sure how they would mate up to your existing exhuast, but otherwise they should work. I bought a crate 302 from Downs Ford a few years ago that was producing 320 hp. I spin it to 6500 and thats about it. .. i would not buy valves unless you need them amd would not switch to studs with these heads for your low hp . Free shipping for many products! Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. 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.
thats after 3 hours of idling/midrange hits to tune the idle and part throttle .
Stock Ford 351W 4bbl dyno numbers - Don Terrill's Speed-Talk The Fora platform includes forum software by XenForo. And agree the cams do help and a few tricks with the heads that I have discovered really make a difference. 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. Ported Hurricane Single Plane and custom 750 HP. PTP Engineering front suspension and 25540R17s all around. There are caveats to this plan, however. 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. However I think the opportunity window is slowly closing. For the most part 302 heads and 351W heads are the same. There is a better way. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. 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. 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. We know what you're thinking--only two-tenths from an extra 45 hp? I was looking at putting on the GT40P heads on. Motor is going into a Ranger. Weiand 7515 xcellerator intake. 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. Gasoline/Diesel all makes on earth & still doing it today with great pride.Feel free to contact me anytime. fordfan289, Aug 27, 2011 Over $2050 for the 165/185 renegades. The "P" heads flow better. 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. 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. Without changing the stock pistons. We heated the bottle to 950 psi and hit the button at 4,500 rpm. We also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. Well also assume that this engine is running stock exhaust manifolds. Keywords In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. Location: Re: Stock Ford 351W 4bbl dyno numbers. We compare the GT40s to modern cylinder heads as well as other heads from the era. What you are trying to do is to increase the amount of airflow through the engine in order to make more power. 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. by travis Sun May 03, 2020 8:33 am. Nudge us with emails, and we'll make it happen. They work, but present their own challenges. (its not their engine) Shop by category. The GT40 heads are a bit more versatile, working with the 5.4 and 6.8, while the GT40P (Explorer/Mountaineer) heads will only work on the 6.8 due to an interference issue. 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. For a better experience, please enable JavaScript in your browser before proceeding. On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. There are too many variables to add to this regarding aftermarket stroker kits or components. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. 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. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. I am very happy too. If they are cheap enough, take them anyway.
GT40 vs GT40P: Who has Smaller Chamber Volume ! More compression Like I said lots of options. Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. 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.
Building 400hp Into A 5.0L Small-Block Engine - MotorTrend Here is the lowdown on exhaust manifolds and VALVE SPRINGS. Take the assembly to a machine shop to have it balanced and install it in the block. Richard Rowe has been writing professionally since 2007, specializing in automotive topics.
Understanding Ford's Fox Body GT40 Cylinder Heads - CJ Pony Parts There are a couple of reasons for this suggestion. As usual, there is much more to this story. Some ideas never go out of style. JavaScript is disabled.
Fastest e303 5.0l's? - FourEyedPride.com At the dragstrip, we gained two-tenths and 2 mph.
Speedmaster PCE281.2046 Small Block Ford Aluminum Cylinder Heads 62cc Just make sure it is a roller cam. They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. 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.
The fix: basic power upgrades for a sluggish 302 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. 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. 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. Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. A forum community dedicated to Ford Mustang owners and enthusiasts. The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. 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! Assuming this will be a daily driver engine, a short duration camshaft, especially when combined with a four-barrel dual plane intake manifold and headers, will deliver extremely snappy throttle response and the whole combination will increase the torque and peak horsepower by somewhere in the neighborhood of 20 to perhaps 35 horsepower. If you're going to use the stock 289 heads, install 1.84-inch intake valves, then port the intake and exhaust; these mods will net you about 185 cfm of intake port flow at 0.50 lift. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. I have a very good running stock 1981 302 in a F100 short box. Plus you will need to drill all the head bolt holes out as the 351W uses larger head bolts. 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. many thanks to all you eco-hippies giving me dirty looks and helping me feel llike an overall badass rebel. Stock 1989 5.0L HO pistons will work if you can find them. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. For a better experience, please enable JavaScript in your browser before proceeding. 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. Cant wait to try um out. check out the. made more power everytwhere and 40 hp is respectable. For a better experience, please enable JavaScript in your browser before proceeding. 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.
Max hp out of gt 40 heads | Mustang Evolution Forum 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. 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.
will gt40p heads fit on a 302 | Ford Mustang Forum 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. I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have.