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! As with all head installations, check piston-to-valve clearance before final startup. 351W D0OE-C heads better than GT40P\'s? - Ford Muscle Cars Tech Forum 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. That's a 40 per cent increase in power from a simple head and cam swap, and one seriously happy Mustang owner! Its increase while significant is still only about that of a decent 351 w, hi im building a nastalgic car so im not going to drag race it but it must go ok ive got a 302 windsor basicly recoed stock but i want to run tunnel rams to go with the the3am would like to put choppy cam and replace the heads any ideas would be much apprecited thankyou, What is the stock head cc of a 1992 f150 302 windsor. Where they differ is the combustion chamber size. this head is complete with new 1.837 int valves and 1.536 exhaust valves. 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. Well that article just got me very ancy, I want these heads!! Fastest e303 5.0l's? - FourEyedPride.com Nudge us with emails, and we'll make it happen. I'll save the effort and lighten my front end by 50# with aluminum. 302 explorer short block with roughly 80k miles GT40's from a local u pull n pay ($97) weiand x-celerator trick flow stage 1 cam 650 holley double pumper car made 322/329 SAE . Step 1. The reason for this is that we're actually replacing mildly worked E7TE heads. Also, you'll need to get a steel distributor gear to replace the iron gear that is currently on your distributor. Understanding Ford's Fox Body GT40 Cylinder Heads - CJ Pony Parts Never not once have I ever seen a SBF rod bolt create a failure. 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. The GT40P heads flow a lot better than stock 351 heads. This kind of improvement may not seem like much, but the owner of our test car, Jamie Holten, runs in FFW Trophy Stock where three-tenths is a lifetime. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. 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? The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. Using the manufacturer recommended springs for your camshaft are a safe bet. The entire front accessory drive and timing chain cover must be removed, along with the distributor and intake manifold. Slover primarily focused on the exhaust side of the GT40P 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. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . For 2018, the Coyote makes 460 hp. 302 with GT40 heads | Ford Mustang Forums Location: Re: Stock Ford 351W 4bbl dyno numbers. These are Ford iron GT-40P heads. 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. 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. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. I got a set of AFR heads , night and day. Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. This combination should be good for about 400 horsepower and as much as 500 if you opt to use the stronger aftermarket pistons. And have discovered something that I dont think anyone else knows. If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. Definitely going to use my P heads. 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. 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. 97% Positive Feedback . 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! 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. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. I recall having an absolute blast with my old K-code coupe back in the day. The only way to really make more power is to go with a stroker kit, blower and/or heads. Both swaps made more sense when parts were readily available at the bone yard for cheap. 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. The combination of this cam with your intake and headers will produce a very nice street engine. A forum community dedicated to Ford performance owners and enthusiasts. All Ford Mustangs | Model Specific Forums, GT-40P Heads - 5.0 Mustang & Super Fords Magazine. 351W with GT40P heads? | Mercury Cougar Owners Holten runs the factory fan, but he had removed it when he ran the 12.63. 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. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. Building a 302-inch small-block to produce 400 hp is really no big deal, but doing. Late-model ford GT40 and GT40P heads with 1.84-inch intake valves will also flow 185 cfm at 0.50 . It's a classic move we've pulled off many times. Now we know why Dennis Hilliard of Central Coast Mustang is so high on these heads. That's fantastic for the minimal investment we made. Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. JEGS High Performance. That's more than enough to feed a power-brake booster. If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. Your IP: Well assume it is a 5.0L with stock heads. 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. GT40P Heads how much hp from them. - StangNet Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. 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. Its always refreshing to see a FORD getting a little face time in your column, even if its a tired 302 with no great expectations of setting the world on fire when the dust settles. 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. These heads have been remanufactured using refaced reclaimed Factory Valves. I have to agree, the GT40P heads flow better than the GT40 iron heads. THANKS VERY MUCH! 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 gt40p head is considered the best OEM 302 head made. If you're running a stock cam, 1.7 rockers will work perfectly. We will go into more detail on the head mods in a later story in Junkyard Builder, so watch for it. I wouldnt recommend reusing lifters though. Choose a cylinder head before you install the pistons. While the heads were off getting a massage, we turned our attention to the cam timing. gt40p headers | Maverick/Comet Forums Mac and Ford Motorsport both make a GT40P spacific header. Beyond the engine's amazingly good appearance, Moore had a couple of good reasons for choosing this engine. However there are plenty of factory heads that with the help of an experienced machine shop can be great. Ive been building ENGINES for 40+ years. how hard to put on? Im 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. Free shipping. Small Block Ford 289/302/5.0L/351w 180cc/60cc Aluminum Cylinder Head E42004. Yea. Sponsored. 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. 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. How much HP and torque do you think I. Yep my **** is coming apart again Isnt life great! This is what I recommend to everyone who is doing a budget 5.0 build. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. this is the price for one head. Now he serves as a regular contributor to OnAllCylinders. If the head bolt holes are 1/2" or slightly larger, ARP makes the washers and can be sourced from Ford Racing or ARP through a speed shop or Summit, Jegs and PAW among others. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? 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. Enter your search keyword. What Are The GT40 & GT40P Heads? - LMR.com So I've got the motor and heads already for my maverick project. Click to reveal Consider having the head's intake ports matched to the intake manifold gasket. Ha! You didnt mention what camshaft you would be choosing or exactly which 5.0L Ford Windsor engine you are working with. Build Thread 1965 Fastback Project "Racesteed". 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. 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. I went to a couple in Tucson and almost all the Ford vehicles that came with a 5.0 had the heads missing. 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. 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. 99 Explorer engine (302) with GT40P heads - Ford Muscle Cars Tech Forum 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. FORD, SMALL BLOCK 302 HO w/ E7, GT40P & GT40 - Alex's Parts With the tuning finalized, the little cam made far more power than we expected, cranking out 328 lb-ft of torque at 4,200 and 294 hp at 5,400 rpm. Compare. This is the main reason why these engines are not modified as much as the small block Chevy. Worst AFR 165 dyno ever | Factory Five Racing Forum Without changing the stock pistons. Dyno results GT40P heads | Vintage Mustang Forums REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS | What's New This is a function of the somewhat wider lobe-separation angle of 112 degrees. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS. Purchase any used aftermarket manifold for the 302 that is designed to function in the 3,500 to 6,500 power band. Manual trans. The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. I am working on a set of iron GT40s hoping it goes faster. Shop by category. Im now thinking of adding a cam to match the carb. $930.00 + $55.00 shipping. There was an article in Hot Rod magazine in the mid '80's where Jon Kaase was developing 351w packages. 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. Budget 300HP 302 Build 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. #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! Holley 670 street avenger carb. Their weak point is that the rotator used on the exhaust valve is very thick. The tube headers showed a gain of almost 100 hp! Not looking for crazy HP. Do not ever, ever think about using the tube type manifolds. K.S. I can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. These are a great head but do need some machining mods to make they really work well. If they are cheap enough, take them anyway. Performance & security by Cloudflare. check out the. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. thats after 3 hours of idling/midrange hits to tune the idle and part throttle . Weiand 7515 xcellerator intake. Most all long tubes come out far enough to clear and other short tube headers will work but there is clearance issues on two of the cylinders. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. Buy the lifters for peace of mind now and hopefully for the duration. I am very happy too. The action you just performed triggered the security solution. If I get different urges later, Ill pursue those then. LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? Every thing he tells you on this site is true. I'm wondering how these heads will interact with the paxton 1220 sl supercharger I'm trying to put on. GT40s have 64cc chambers. I bought a crate 302 from Downs Ford a few years ago that was producing 320 hp. Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. 68stang351 Founding Member May 16, 2002 850 Like I said lots of options. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. I don't need tons of power to enjoy the car. 1983 Mustang G.T. Those heads were unported and had stock valve sizes! PTP Engineering front suspension and 25540R17s all around. Most of them are aware of what changes need to be completed. i have a 302 engine from a 1977 granada and i am wondering if gt40p heads from an explorer will fit on this motor. 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. Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? 331/347 stroker w/gt40p's, waste?Hp?cost involved? - Maverick However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. 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? many thanks to all you eco-hippies giving me dirty looks and helping me feel llike an overall badass rebel. The GT40 heads have thermactor holes built in to connect to the EGR/smog equipment whereas the GT40P heads use an external EGR connective system. The fix: basic power upgrades for a sluggish 302 The reply has so many assumptions that I cant even assume to know the answer. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. timing and compression ratio with gt40p heads - Modded Mustang Forums The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. 302 GT40 Dyno Results - FourEyedPride.com The Fora platform includes forum software by XenForo. FORD GT40p 4 BAR HEADS IN GOOD CONDITION . If you wanted to make your engine feel strong, these would be a decent investment, but they will require some modifications. This is not a criticism but instead consider it to be more of a heads-up. There is a better way. Tim's junkyard refugee survived the beating and we had a bitchin' story. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. You'll also have to use your 289 timing chain cover since it has a hole for the oil dip stick and fuel pump. Ported Hurricane Single Plane and custom 750 HP. HAD '82 GT monochromatic (red).black cloth HAVE Yes- thank you. bmcdaniel, Feb 17, 2004 #7. v8maverick Member. For both the GT40 and GT40p heads, I STRONGLY suggest upgrading the valve springs. I'm new and I'm 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. He'd be the best source. This test went so well that we were eager to see what the slightly bigger cam would do. GT40P heads, 302 and Victor Jr. intake: - Factory Five Racing Forum I got rid of the carburetor and went with a F.A.S.T. Motor is going into a Ranger. So . These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. 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. Building 400hp Into A 5.0L Small-Block Engine - MotorTrend You can have your current 28 oz rebalanced to 50. 1986 Short block with notched pistons. Sure, you could race-port the existing E7 castings, which many have done, but then you're putting quite a bit of change into stock heads. They were located in Tahachapi CA, and were sold with upgraded springs for $650.00, back in 2002-2003 ish. 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. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. will gt40p heads fit on a 302 | Ford Mustang Forum We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. 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. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. Ford Factory 5.0 Performance Cylinder Heads. MAC is the only manufacturer of these headers, and the parts we installed fit like a glove with no problems whatsoever. 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. GT40 Heads On A 289? | Ford Muscle Cars Tech Forum Test 3: Installed the larger Lunati camagain, no other changes. The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. #1:::Throw out all your Magazines that suggest what to do! SB Ford, GT40 .575" Lift Max Output II Drop in Valve Spring Kit, Hyd Roller, 140 Lb Seat. A good port job can set you back another $500-$1,000. No-option stripper- I like strippers. For a better experience, please enable JavaScript in your browser before proceeding. Free shipping for many products! 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.

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