Ive been building ENGINES for 40+ years. 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. We set the timing to 34 degrees and rejetted the carburetor to get our desired 12.5:1 air/fuel ratio. Thank You. 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. 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. 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. I'm sure the dyno operator used some goofball correction factor to make the numbers look higher. HiPo manifolds and Ill be good.
LOW-BUCK 302 FORD HEAD UPGRADE - YouTube So . 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. 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. We decided to test both ideas, so we ordered two roller cams from Lunati: a shorter-duration cam that would deliver decent idle vacuum and maybe make around 320 to 335 hp, and a longer-duration version that might push the horsepower up to perhaps 350 hp.
Junkyard Gt40p Heads-add 30+ Hp to Your 5.0l (For Free?) Small Block Ford 289/302/5.0L/351w 180cc/60cc Aluminum Cylinder Head E42004. 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. Best of all, no machining is required to install these on your stock cast iron heads! For this reason, we're not sure what kind of boost the GT-40P heads will give. Within a few hours of his discovery, the engine was sitting in the back of his truck on its way to a new home. Manual trans. I added a link to it. check out the. I would like to know what heads, cam and intake manifold combination to use for the most HP I can squeeze out of that motor. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. Cloudflare Ray ID: 7a2e2d95dedea1e4 69.90.139.244 Different years can have different combustion chamber sizes but ffor the most part there will be no performance increases by going with 302 heads. Instructions on porting the GT-40p heads here. Anyways, I know the gt40ps will bump . 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. These timeslips are from 1280' above sea level. I got lucky and found a complete Explorer GT40P engine online. Like I said lots of options. 950.00 us a set and will ship . P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. 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. The only one that's close, is #7. are you twisted331 also? This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community.
What Are The GT40 & GT40P Heads? - LMR.com They also have emissions legal heads as well. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Keep in mind that swapping camshafts is a fairly extensive effort.
gt40p headers | Maverick/Comet Forums If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. I'm wondering how these heads will interact with the paxton 1220 sl supercharger I'm trying to put on. Everything fits, use the stock rockers and pushrods. 1983 Mustang G.T. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam.
GT-40 heads HP increase | Mustang Forums at StangNet I have to agree, the GT40P heads flow better than the GT40 iron heads. 1979 Indy 500 Pace Car. 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. I have a very good running stock 1981 302 in a F100 short box.
Understanding Ford's Fox Body GT40 Cylinder Heads - CJ Pony Parts Over $2050 for the 165/185 renegades. A forum community dedicated to Ford performance owners and enthusiasts. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. When building an engine there is a lot to take into consideration. Joined: Sun Mar 15, 2009 9:31 am. (Please note these are not GT40P Explorer heads). 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. These are a great head but do need some machining mods to make they really work well. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. As with all head installations, check piston-to-valve clearance before final startup. Just got through porting one of my gt40p heads today.
How to Get More Horsepower Out of a Ford 289 | It Still Runs They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. This will keep you from dropping your overall static compression ratio and losing power. 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. For both the GT40 and GT40p heads, I STRONGLY suggest upgrading the valve springs. I don't need tons of power to enjoy the car. I view the GT40P heads similar to Granada brakes.
331/347 stroker w/gt40p's, waste?Hp?cost involved? - Maverick thats after 3 hours of idling/midrange hits to tune the idle and part throttle . the springs are new stock oem ford. Weiand 7515 xcellerator intake. Not *as* good as the GT40p heads, but I'd prefer to not have to worry about exhaust fitment issues, or have a narrow range of what I can work with.
FORD GT40p 4 BAR HEADS IN GOOD CONDITION w/ONE BOLT BROKEN The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. After graduating from Iowa State University with a journalism degree in 1978, he combined his two passions: cars and writing. In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. No-option stripper- I like strippers. Let us explain. 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. 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? United Engine and Machine sells cheap but decent pistons that will do what you're wanting. But dont think that adding a bigger camshaft will make more power. Most of them are aware of what changes need to be completed. 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. All Ford Mustangs | Model Specific Forums, GT-40P Heads - 5.0 Mustang & Super Fords Magazine. The factory heads have a boss for the exhaust valve that restricts flow through the exhaust port. Central Coast Mustang sells GT-40P heads at a great price, making them a viable alternative in a market flooded with performance head choices. This is not a criticism but instead consider it to be more of a heads-up. I'll save the effort and lighten my front end by 50# with aluminum. I'm using the Trick Flow stage 1 cam with 1.7 roller rockers. I turned it because it was tired when I got it.
Add 40 to 70 HP to your 302 yourself - Factory Five Racing Forum Then why did you port the heads and how do you know if you made an improvement. this head fits years 95-01 explorer mountaineer mercury mountaineer . 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. $169.50. Test 1: 750-cfm carburetor, dual-plane intake manifold, and stock camshaft. It turned out we were conservative on both counts. 68 XR7 & 68 M-100. 1 - 7 of 7 Posts. ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. bmcdaniel, Feb 17, 2004 #7. v8maverick Member. 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. Sponsored. With the P-heads requiring pedestal-mount rockers, we also called up Crane Cams for a set of 1.6 pedestal-mount roller rockers. Can I run the new cam with the same roller hydraulic lifters or do I have to change the lifters too? On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford.
Ford Explorer Mountaineer 5.0 Ohv Iron 302 Sbf 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. As you might expect with more duration, the idle quality dropped significantly but was still able to make 11.5 inches of vacuum at 980 rpm. All costing in the end at least another $2k. It's an 86 roller 5.0 engine that had a recent rebuild sometime in the past with keith black pistons, otherwise stock. Building a 302-inch small-block to produce 400 hp is really no big deal, but doing. Calculated compression to 9.8:1. This is the main reason why these engines are not modified as much as the small block Chevy. Boy, were we surprised with the results. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. 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.
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. this is the price for one head. this head is complete with new 1.837 int valves and 1.536 exhaust valves. Or just play it safe and let the fans ask away about another daring 5.0 TB bolt on or for an exciting surprise, do a LS______ fill in the blanks. Long tube headers are a terrific idea, but you need to open up the exhaust side. I had a set of 69 302 heads I ran for a while . In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. You didnt mention what camshaft you would be choosing or exactly which 5.0L Ford Windsor engine you are working with. We did a quick search for hydraulic roller cams and landed on a COMP camshaft that looked promising. Keywords When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1.7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Learn how your comment data is processed. Common sense would suggest that with the heavy lifting complete and the old cam removed, by not installing the new roller lifters along with the camshaft could be asking for the possibility of trouble just a few thousand miles down the road. The engine never huffed oil out of the breathers, and the spark plugs all looked excellent. Since 2003, Jeff has held various positions at Car Craft (including editor), has written books on small block Chevy performance, and even cultivated an impressive collection of 1965 and 1966 Chevelles. Holley 670 street avenger carb. The GT40P heads flow a lot better than stock 351 heads. For a better experience, please enable JavaScript in your browser before proceeding. 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. Ported Hurricane Single Plane and custom 750 HP. I just read about this build on the corral.net. For a better experience, please enable JavaScript in your browser before proceeding.
1996-2001 Ford Explorer 5.0L V8 Specifications Nudge us with emails, and we'll make it happen. The entire front accessory drive and timing chain cover must be removed, along with the distributor and intake manifold. 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. I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. people can stop saying that adding aftermarket cam with stock heads is a waste of time. Not looking for crazy HP. The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. 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.
GT40P heads, 302 and Victor Jr. intake: - Factory Five Racing Forum Rowe studied engineering, philosophy and American literature at Central Florida Community College. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. A forum community dedicated to Ford Mustang owners and enthusiasts.
FORD, SMALL BLOCK 302 HO w/ E7, GT40P & GT40 - Alex's Parts There is a better way. I got a set of AFR heads , night and day. The gt40p head is considered the best OEM 302 head made. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. . just curious. check out the. The Fora platform includes forum software by XenForo. Here is the lowdown on exhaust manifolds and VALVE SPRINGS. Without changing the stock pistons. The "P" heads flow better. For a better experience, please enable JavaScript in your browser before proceeding. However, stepping up in the performance head market will set you back more than $1,200 for a decent pair of aluminum castings--and that's straight out of the box, with no porting. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. Im now thinking of adding a cam to match the carb. 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. Along with the heads, we used MAC headers for GT-40P heads. at the crank.
I am very happy too. This is what I recommend to everyone who is doing a budget 5.0 build. This test went so well that we were eager to see what the slightly bigger cam would do. And have discovered something that I dont think anyone else knows. Be careful, I was once bitten by one of those reptile engine builders. A trip to Orlando Speed World provided us with updated quarter-mile times. Have fun, be safe, enjoy. 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. 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. They work, but present their own challenges. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada.
How to Build a Cheap Drag Racing 302 Ford Motor | It Still Runs Beyond the engine's amazingly good appearance, Moore had a couple of good reasons for choosing this engine. Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. .
Mustang Cylinder Head & Camshaft Guide (79-95) - LMR the engine is carburated of that makes a difference. With nitrous, this is easily a mid-11-second ride. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. Build Thread 1965 Fastback Project "Racesteed". Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. This will cost additional money but is still worth it, in our opinion. I wouldnt recommend reusing lifters though. We also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. The car weighs #2835 with driver. 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. Install a set of 1.7:1 roller-tipped rocker arms on the heads. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD.
anyone have experience with GT40P heads on a 92 351W Here is my setup. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. This is needed for the steel roller cam. You can use the stock roller lifters with any size cam you want. Just make sure it is a roller cam. made more power everytwhere and 40 hp is respectable. 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. I went to a couple in Tucson and almost all the Ford vehicles that came with a 5.0 had the heads missing. Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. 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! This is an older thread, you may not receive a response, and could be reviving an old thread. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. 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. hole size 302 is 7/16 and 351 is 1/2 never messed with the timing, its at 35* total . You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. FORD GT40p 4 BAR HEADS IN GOOD CONDITION . We compare the GT40s to modern cylinder heads as well as other heads from the era.
Gt40/gt40p Heads On A 351w Questions - StangNet 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. 1986 Short block with notched pistons. GT40, GT40P, would be great factory heads. After a couple grand you have a killer set of heads, but there's got to be a less-expensive way of making horsepower. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Application Fits 1979-95 Mustang 302/351 w/ OEM Small Block Ford Heads 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. If you dont feel comfortable doing this higher a pro.
Supercharging GT40p heads | Modded Mustang Forums The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. On slicks the car went some low 7.70s right at 90mph. And remember ENGINES have been being built/rebuilt/modified for years. Plus you will need to drill all the head bolt holes out as the 351W uses larger head bolts.