I got lucky and found a complete Explorer GT40P engine online. 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. Mar 23, 2004. 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. 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? As with all head installations, check piston-to-valve clearance before final startup. Holten runs the factory fan, but he had removed it when he ran the 12.63. This test went so well that we were eager to see what the slightly bigger cam would do. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. 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. JUNKYARD GT40P HEADS-ADD 30+ HP TO YOUR 5.0L (FOR FREE?) Well offer one as an example. Small Block Ford 289/302/5.0L/351w 180cc/60cc Aluminum Cylinder Head E42004. I recall having an absolute blast with my old K-code coupe back in the day. They also have emissions legal heads as well. 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. Step 1. Skip to main content. Buy the lifters for peace of mind now and hopefully for the duration. The headers will improve this airflow throughout the entire rpm rangeadding more torque and horsepower. GT 500; Posts: 8496; Location: Brisbane . This will cost additional money but is still worth it, in our opinion. You just want to keep it out of detonation. The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. 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. I love my setup and it is very strong engine. '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
The GTp heads are like GT 40's with smaller combustion chambers and the spark plugs are relocated for a more efficient burn. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. We gained 45 hp and 40 lb-ft of torque. Slover primarily focused on the exhaust side of the GT40P heads. Over $2050 for the 165/185 renegades. 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. +1 I would go with the regular GT40 heads. 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. No-option stripper- I like strippers. A trip to Orlando Speed World provided us with updated quarter-mile times. Always the weak area in the 289 and 302 is the tiny 5/16 inch connecting rod bolts and the miniscule intake and exhaust ports. You can use the stock roller lifters with any size cam you want. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! The GT40 & GT40P heads had a few differences that are note-worthy, the most importantly being the bump in compression. by travis Sun May 03, 2020 8:33 am. Cloudflare Ray ID: 7a2e2d95dedea1e4 Small-block Fords and Mopars only use four head bolts per cylinder, so retaining proper head-gasket sealespecially with nitrousis a point that demands attention, so we ordered a set of Fel-Pro MLS head gaskets rather than a standard, composition gasket. Then why did you port the heads and how do you know if you made an improvement. I need that part number too! This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. Hey all, I'm working on building a 302 with my gt40p heads. 68 XR7 & 68 M-100. Yea. Consider having the head's intake ports matched to the intake manifold gasket. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. Every thing he tells you on this site is true. Purchase a set of flat top pistons (from Ford Motorsport, TRW or Keith Black) with machined valve reliefs and designed to provide 10:1 compression with a 59 to 60 cc combustion chamber cylinder head. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 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. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. ***Most important is theStupid question is the one that was never asked!*** (its not their engine) When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Boy, were we surprised with the results. 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. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. And agree the cams do help and a few tricks with the heads that I have discovered really make a difference. 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. Its NA but makes use of AFR heads and some other aftermarket goodies. Mac and Ford Motorsport both make a GT40P spacific header. I went to a couple in Tucson and almost all the Ford vehicles that came with a 5.0 had the heads missing. With no other changes we gained 25 hp using factory iron heads. Gt40 heads/intake from a jy explorer, leave the . FORD GT40p 4 BAR HEADS IN GOOD CONDITION . Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. 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. We also added an Edelbrock Performer RPM dual-plane intake and a set of 158-inch headers with no mufflers. Scorpion 1.6 roller rockers. I have to agree, the GT40P heads flow better than the GT40 iron heads. We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. 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. I had a set of 69 302 heads I ran for a while . Within a few hours of his discovery, the engine was sitting in the back of his truck on its way to a new home. Good on ya Jeff Smith. Free shipping. There are literally a dozen or so camshaft companies that offer a mild hydraulic roller cam for a 5.0L Ford. Eldelbrocks Air Gap intake manifold should work well with the combination. Test 2: Changed to the smaller of the two Lunati camshaftsno other changes. JavaScript is disabled. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. For the first test, we were reusing the stock Explorer cam, so the engine didn't need any break-in time. The combination of this cam with your intake and headers will produce a very nice street engine. Now he serves as a regular contributor to OnAllCylinders. It runs smooth but seems lazy. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. Save narve00 Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. 1983 Mustang G.T. Good Luck. Related Resources Mustang Generation Nicknames: What Do They Mean? The Fora platform includes forum software by XenForo. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. What did the heads flow? Early Windsors tend to have fairly restrictive exhaust manifolds, making the addition of a set of headers that much more efficient. 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). A COMP hydraulic roller cam we found works well with this combination. That's a good combo in my book. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. I don't need tons of power to enjoy the car. Headers and a camshaft will help but the engine really needs aftermarket 3/8 inch connecting rod bolts and aftermarket cylinder heads. JavaScript is disabled. For the most part 302 heads and 351W heads are the same. Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. This is not a criticism but instead consider it to be more of a heads-up. Long tube headers are a terrific idea, but you need to open up the exhaust side. The Fora platform includes forum software by XenForo. Stock 1989 5.0L HO pistons will work if you can find them. Assorted screwdrivers, pliers and vise-grips. JavaScript is disabled. Through Central Coast you can have the heads fully prepped for your combination. Different years can have different combustion chamber sizes but ffor the most part there will be no performance increases by going with 302 heads. BONUS TEST-FOUR DIFFERENT 302 INTAKES.. Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. For real performance, stock E7TE heads leave a lot to be desired. And have discovered something that I dont think anyone else knows. THANKS VERY MUCH! I had those on my car before I upgraded and they were nice heads. The newer camshaft is designed for use with a soft bronze distributor gear, not the hardened steel gear used for older camshafts. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 SBF OEM | eBay Motors, Parts & Accessories, Car & Truck Parts & Accessories | eBay! (Please note these are not GT40P Explorer heads). Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. But don't think that adding a bigger camshaft will make more power. Would have liked to see a comparison done on the same short block using a set of decently-ported early non-Thermactor iron heads Tracy Blackford, 65 Mustang FB, 331 built with 289 H beam rods and 383W piston, 282S cam, self ported '70 351w heads, Dougs Tri-Y headers. I have a 302 Windsor V8 EFI engine that I converted to a 600 cfm carburetor with a Street Warrior intake manifold. Posted on May 07, 2014 by promarengine. 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 also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. You can have your current 28 oz rebalanced to 50. Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. It turned out we were conservative on both counts. Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. For 2018, the Coyote makes 460 hp. These are Ford iron GT-40P heads. We set the timing to 34 degrees and rejetted the carburetor to get our desired 12.5:1 air/fuel ratio. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. 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. 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. Those are really good numbers. I guess I had it backwards, sorry about that, didn't mean to spread misinformation. You can have your current 28 oz rebalanced to 50. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members). SB Ford GT40 Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. There are caveats to this plan, however. Not sure how they would mate up to your existing exhuast, but otherwise they should work. However I think the opportunity window is slowly closing. 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. In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. K.S. We need a build on a 400+ hp 302/6 build. If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. Like I said lots of options. 69.90.139.244 Choose a cylinder head before you install the pistons. Really hurt too. Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. If I get different urges later, Ill pursue those then. 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:?:!?!?!? Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. $169.50. I got lucky and found a complete Explorer GT40P engine online. 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. the springs are new stock oem ford. 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. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. I got rid of the carburetor and went with a F.A.S.T. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. 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. Anythoughts? 1983 Mustang G.T. 68stang351 Founding Member May 16, 2002 850 So I've got the motor and heads already for my maverick project. The later model distributors had a different diameter shaft than the earlier ones. The only one that's close, is #7. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. 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. Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. 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. ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. check out the. They were located in Tahachapi CA, and were sold with upgraded springs for $650.00, back in 2002-2003 ish. The valve seats have been cut on a . Required fields are marked *. There are too many variables to add to this regarding aftermarket stroker kits or components. 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. Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. Dec 8, 2011. I turned it because it was tired when I got it. Yea. There was an article in Hot Rod magazine in the mid '80's where Jon Kaase was developing 351w packages. I am working on a set of iron GT40s hoping it goes faster. This is just a quick overview of the changes that need to be done. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. Let us explain. 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. The kit offers adjustable power from 50 to 250 hp with a simple jet change. 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. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. Yeah, except those. a) ain't early and b) aren't 289 heads. This time around, we chose a shining example of this junkyard art form. You keep stock drivability, and stock gas milage if you can stay out of boost. 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. Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. Their weak point is that the rotator used on the exhaust valve is very thick. Learn how your comment data is processed. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. #1:::Throw out all your Magazines that suggest what to do! The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. Keep in mind that swapping camshafts is a fairly extensive effort. 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. This is needed for the steel roller cam. I've not seen a set of longtubes that have an issue with GT40P's, either. It's a classic move we've pulled off many times. The tube headers showed a gain of almost 100 hp! Free shipping for many products! They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. The factory heads have a boss for the exhaust valve that restricts flow through the exhaust port. Im now thinking of adding a cam to match the carb. A good port job can set you back another $500-$1,000. 1 - 7 of 7 Posts. That's a 40 per cent increase in power from a simple head and cam swap, and one seriously happy Mustang owner! Shop by category. That said there are some better aftermarket options for heads also. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. Enter your search keyword. Compare. We turned to Rare Auto Design in Orlando for dyno tests to find out how much horsepower we gained. 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? Have fun, be safe, enjoy. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. He'd be the best source. 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. this head is complete with new 1.837 int valves and 1.536 exhaust valves. *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. Car Craft mag. 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. I can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. 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. They work, but present their own challenges. Here is my setup. 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. Test 1: 750-cfm carburetor, dual-plane intake manifold, and stock camshaft. GT40, GT40P, would be great factory heads. fordfan289, Aug 27, 2011 I added a link to it. For this reason, we're not sure what kind of boost the GT-40P heads will give. E303 Cam advanced 4 degrees. Here is the lowdown on exhaust manifolds and VALVE SPRINGS. 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. The "P" heads flow better. T5 with 3.73s. 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. Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. Someone does make the Tri-Y's headers for the early Mustangs using the "P" heads. And remember ENGINES have been being built/rebuilt/modified for years. are you twisted331 also? Runs well. Install a set of 1.7:1 roller-tipped rocker arms on the heads. GT40P heads, what kind of performance do they give? You didnt mention what camshaft you would be choosing or exactly which 5.0L Ford Windsor engine you are working with. I'd get the gt40 setup, and put an s trim on it. K.S. 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. 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. Not bad for off the shelf parts and a stock shortblock. Weiand 7515 xcellerator intake. 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. This is an older thread, you may not receive a response, and could be reviving an old thread. Also, you'll need to get a steel distributor gear to replace the iron gear that is currently on your distributor. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. Win or lose, if you buy the ticket you must take the ride. This is what I recommend to everyone who is doing a budget 5.0 build. 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. how much HP and torque? Pride is built, in your garage, with your two hands. Motor is going into a Ranger. 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. Maybe I'll think about a cam swap? Well also assume that this engine is running stock exhaust manifolds. We will go into more detail on the head mods in a later story in Junkyard Builder, so watch for it. The 2 heads are about the same when looking at the numbers with the GT40p heads having a slight edge. If you wanted to make your engine feel strong, these would be a decent investment, but they will require some modifications. 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. A forum community dedicated to Ford Mustang owners and enthusiasts. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS. Both swaps made more sense when parts were readily available at the bone yard for cheap. Calculated compression to 9.8:1. If you dont feel comfortable doing this higher a pro. You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. The Fora platform includes forum software by XenForo. I've got gt40p heads for it I'll be running, and can't afford better . $700.98. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. 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. We are offering a pair of original Ford Cobra 5.0 GT40 cast iron cylinder heads. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. 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.