302 with gt40p heads horsepower

As usual, there is much more to this story. fordfan289, Aug 27, 2011 The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. GT40P heads, what kind of performance do they give? - FourEyedPride.com PTP Engineering front suspension and 25540R17s all around. SB Ford, GT40 .575" Lift Max Output II Drop in Valve Spring Kit, Hyd Roller, 140 Lb Seat. the engine is carburated of that makes a difference. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. Ive been building ENGINES for 40+ years. I have a very good running stock 1981 302 in a F100 short box. this head fits years 95-01 explorer mountaineer mercury mountaineer . You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. I must agree with Jeff Smith. And remember ENGINES have been being built/rebuilt/modified for years. Joined: Sun Mar 15, 2009 9:31 am. Anyways, I know the gt40ps will bump . This website is using a security service to protect itself from online attacks. 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. Because of this, your tuneup will probably need to be modified. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. Yep my **** is coming apart again Isnt life great! Gt40p heads - FourEyedPride.com 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. Finally, we exchanged the Explorer's EFI manifold (which is a pretty good manifold in its own right) for an Edelbrock Performer RPM Air Gap intake and a Holley 750-cfm HP-style carburetor. He'll have to get a gear for his distributor. 02-11-2012, 07:16 PM #6 fiveoh 86lx Step 1. Obviously, tuneups will vary. This is just a quick overview of the changes that need to be done. The dyno recorded a peak horsepower reading of 489 hp, but the air/fuel ratio was slightly on the rich side at 11.5:1, so we increased the nitrous jet to a 61 and hit the button again. This is an older thread, you may not receive a response, and could be reviving an old thread. Ha! VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Calculating pushrod length He'd be the best source. Junkyard Gt40p Heads-add 30+ Hp to Your 5.0l (For Free?) You didnt mention which cam you had in mind. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. Holley 670 street avenger carb. 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. fuel injection system . We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. Your email address will not be published. HiPo manifolds and Ill be good. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. You'll have to plug the oil hole that is in the engine from the old oil dipstick. We need a build on a 400+ hp 302/6 build. I have a 432 HP non Hi Po 289 I built. Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. Never not once have I ever seen a SBF rod bolt create a failure. 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. SBF engines are modified constantly. Runs well. The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. Calculated compression to 9.8:1. 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. For the most part 302 heads and 351W heads are the same. 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. Car Craft mag. 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. Yes Mr.Smith, your column here at OAC adorned with extreme performance without power adders, or all Engine as its known, from a superior pushrod Small Block featuring almost all USA sourced modern components with the familiar smell of Ford Blue. anyone have experience with GT40P heads on a 92 351W Gt40 heads/intake from a jy explorer, leave the . A COMP hydraulic roller cam we found works well with this combination. 302HO with gt40p heads | Mustang Forums at StangNet I am very happy too. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. Here a comparison of different heads on a 302: I'm very happy with my GT40P. 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. They fill that spot between power and budget. Part of this reason is due to its inherent strength and simplicity, but a lot of it has to do with how little Ford has changed it over the years. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. hole size 302 is 7/16 and 351 is 1/2 Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? 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. And have discovered something that I dont think anyone else knows. 68stang351 Founding Member May 16, 2002 850 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. We set the timing to 34 degrees and rejetted the carburetor to get our desired 12.5:1 air/fuel ratio. 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. $139.99. When I purchased my "brand new" set of GT40P's, I bought them from an Mustang specific machine shop that used to exist called Central Coast Mustang. Some ideas never go out of style. The later model distributors had a different diameter shaft than the earlier ones. GT 500; Posts: 8496; Location: Brisbane . 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. After we installed the heads and with the fan off, he ran a 12.46 at 107.9. 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. But the part about a cam replacement possibly being a labor intensive undertaking is correct. Depends on the budget. I wouldnt recommend reusing lifters though. But dont think that adding a bigger camshaft will make more power. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. Just make sure it is a roller cam. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. 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. So . 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. Everything fits, use the stock rockers and pushrods. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! Those are really good numbers. THANKS VERY MUCH! Because its all been done time after time after. For real performance, stock E7TE heads leave a lot to be desired. Consider having the head's intake ports matched to the intake manifold gasket. The MPH was there to run a little better but the local track is about terrible. Stock heads with a fresh 3-angle valve job, shorty headers, T5, 4.10s, stock Explorer intake and stock '88 GT short block with 140,000 miles on it and an E cam in it. Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. 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? Be careful, I was once bitten by one of those reptile engine builders. Thanks. +1 I would go with the regular GT40 heads. I recall having an absolute blast with my old K-code coupe back in the day. I got a set of AFR heads , night and day. 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. We gained 45 hp and 40 lb-ft of torque. The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. will gt40p heads fit on a 302 | Ford Mustang Forum We turned to Rare Auto Design in Orlando for dyno tests to find out how much horsepower we gained. Using the manufacturer recommended springs for your camshaft are a safe bet. Features hardened 4140 Chromoly retainers, valve locks, spring shims, a spring height gauge, valve seals, and instructions. Stock Ford 351W 4bbl dyno numbers - Don Terrill's Speed-Talk If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. 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. You'll also have to use your 289 timing chain cover since it has a hole for the oil dip stick and fuel pump. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! Add 40 to 70 HP to your 302 yourself - Factory Five Racing Forum 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. #3::: Do your homework,get quality parts,dont skimp. The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. Take the assembly to a machine shop to have it balanced and install it in the block. All costing in the end at least another $2k. Building a 302-inch small-block to produce 400 hp is really no big deal, but doing. 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. Related Resources Mustang Generation Nicknames: What Do They Mean? 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. Both swaps made more sense when parts were readily available at the bone yard for cheap. Shop by category. Real world data seems to show that GT40 or GT40P cylinder heads, assuming no other mods on your Foxbody, are good to add anywhere between 20-40 HP (over stock heads). This is needed for the steel roller cam. They suffered from poor aftermarket support up until about 15 years ago when it really came on strong. Ford Explorer Mountaineer 5.0 Ohv Iron 302 Sbf The kit offers adjustable power from 50 to 250 hp with a simple jet change. Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. Ported Hurricane Single Plane and custom 750 HP. Thank You. That's an improvement of 22 hp over Test 2. On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. I have managed to get 402 horse power from a 289 hipo natural aspirated. JEGS High Performance. A forum community dedicated to Ford Mustang owners and enthusiasts. For the first test, we were reusing the stock Explorer cam, so the engine didn't need any break-in time. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. Win or lose, if you buy the ticket you must take the ride. Dec 8, 2011. I had a set of 69 302 heads I ran for a while . What Cam and Springs to Use for GT40 Heads Required fields are marked *. The GT40P cylinder heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. We've seen what happens from previous Ford experience when power levels above 500 hp tend to either pop head gaskets or saw blocks in half. 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. 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. The best thing to do would be to use a specific break-in oil for the first 200 to 300 miles of use to reduce the change of a potential problem with undue wear. Compare. Mac and Ford Motorsport both make a GT40P spacific header. LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? I can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. 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. Stock valve sizes? So I've got the motor and heads already for my maverick project. AFR 165cc 58cc Heads. I have been working on Fords for 40 years and I have experimented with a few tricks of my own. Well offer one as an example. The car weighs #2835 with driver. This will keep you from dropping your overall static compression ratio and losing power. Compare. A forum community dedicated to Ford Mustang owners and enthusiasts. Yeah, except those. a) ain't early and b) aren't 289 heads. check out the. Yea. GT40 Heads On A 289? | Ford Muscle Cars Tech Forum There was an article in Hot Rod magazine in the mid '80's where Jon Kaase was developing 351w packages. However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. You can have your current 28 oz rebalanced to 50. 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. There's not a lot of reson to use 351 heads later than '75 since they essentially identical to 302 heads except for head bolt holes. I've got gt40p heads for it I'll be running, and can't afford better . check out the. ***Most important is theStupid question is the one that was never asked!*** When compared to the new generation of performance engines on the market today like the 5.0L DOHC Coyote engine, your engine will not come close. Cloudflare Ray ID: 7a2e2d95dedea1e4 Ford 302W / 5.0L History & Specifications - The Ranger Station #1:::Throw out all your Magazines that suggest what to do! Aside from the cost of the nitrous itself, this setup should cost you little more than a stock rebuild using all brand new parts. The specs are a conservative 212/218 degrees of duration at 0.050-inch tappet lift but offer a really nice 0.512-inch valve lift for both the intake and exhaust. All Ford Mustangs | Model Specific Forums, GT-40P Heads - 5.0 Mustang & Super Fords Magazine. You didnt mention what camshaft you would be choosing or exactly which 5.0L Ford Windsor engine you are working with. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. GT40P heads? how hard to put on? how much HP and torque? Instructions on porting the GT-40p heads here. Sponsored. 302 GT40 Dyno Results - FourEyedPride.com Motor is going into a Ranger. Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. These timeslips are from 1280' above sea level. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. 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. Torque on the other hand isnt something to write home about. The GTp heads are like GT 40's with smaller combustion chambers and the spark plugs are relocated for a more efficient burn. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. 331/347 stroker w/gt40p's, waste?Hp?cost involved? - Maverick As a final goal, we decided to bolt on a simple nitrous system and see if we could push this little small-block Ford to make some real power. I'm sure the dyno operator used some goofball correction factor to make the numbers look higher. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. If you know him, ask him. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. This engine will be good for your 65 Mustang. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. Enter your search keyword. 1 - 7 of 7 Posts. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Without changing the stock pistons. I'll save the effort and lighten my front end by 50# with aluminum. 302 heads on 351w | ClassicBroncos.com Forum could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. But don't think that adding a bigger camshaft will make more power. However there are plenty of factory heads that with the help of an experienced machine shop can be great. You keep stock drivability, and stock gas milage if you can stay out of boost. With no other changes we gained 25 hp using factory iron heads. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. i know a guy who used to build race engines so he has all the right tools, how much would it help to get the heads ported and polished or anything else he could do to them. The reply has so many assumptions that I cant even assume to know the answer. I'll prob take a trip up there this weekend after scavenging the junkyards, thanks a million. bmcdaniel, Feb 17, 2004 #7. v8maverick Member. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. Central Coast Mustang sells GT-40P heads at a great price, making them a viable alternative in a market flooded with performance head choices. timing and compression ratio with gt40p heads - Modded Mustang Forums If you wanted to make your engine feel strong, these would be a decent investment, but they will require some modifications. 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. These are Ford iron GT-40P heads. Im a different animal. . It's a classic move we've pulled off many times. The tube headers showed a gain of almost 100 hp! 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. at the crank. 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. 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. For a better experience, please enable JavaScript in your browser before proceeding. T5 with 3.73s. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. (its not their engine) Free shipping for many products! Gt40/gt40p Heads On A 351w Questions - StangNet Yeah, out of a bolt on upgrade, you'd probably be looking at 260-280rwhp ish with supporting mods. 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. 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. 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. Their weak point is that the rotator used on the exhaust valve is very thick. 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. 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 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. T5z and 3.89 9" TL rear. GT40P Heads how much hp from them. - StangNet 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. 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. Here is my setup. A trip to Orlando Speed World provided us with updated quarter-mile times. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. Tim's junkyard refugee survived the beating and we had a bitchin' story. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! 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. 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. 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. Choose a cylinder head before you install the pistons. United Engine and Machine sells cheap but decent pistons that will do what you're wanting. Step 2. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. The GT40 and GT40P cylinder heads are highly sought after, but how do they stack up against other cylinder heads, and is it worth it to upgrade the Fox Body's stock heads? 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. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. 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. Good on ya Jeff Smith. I'm wondering how these heads will interact with the paxton 1220 sl supercharger I'm trying to put on. I've not seen a set of longtubes that have an issue with GT40P's, either. Beyond the engine's amazingly good appearance, Moore had a couple of good reasons for choosing this engine. Click to reveal 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.

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