302 with gt40p heads horsepower

Best of all, no machining is required to install these on your stock cast iron heads! 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. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. Limited header choice is certainly a challenge. I have a 66 mustang with its original untouched 289 with over 140 k on it that Ive been running a blow thru turbo making 14 lbs of boost on for the last 5 years and its never given me a problem. 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. . If you're running a stock cam, 1.7 rockers will work perfectly. Not to mention, they will run circles around GT40P's out of the box. Works on all factory cast iron E7, GT40, and GT40P cylinder heads! Install a set of 1.7:1 roller-tipped rocker arms on the heads. Joined . I got rid of the carburetor and went with a F.A.S.T. Holley 670 street avenger carb. $139.99. 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. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. I have to agree, the GT40P heads flow better than the GT40 iron heads. Instructions on porting the GT-40p heads here. We are offering a pair of original Ford Cobra 5.0 GT40 cast iron cylinder heads. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. Even with a stock Mustang 5.0 cam makes good power. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. Not bad for off the shelf parts and a stock shortblock. Thank You. Also, you'll need to get a steel distributor gear to replace the iron gear that is currently on your distributor. GT40 Heads On A 289? | Ford Muscle Cars Tech Forum Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. Stock 1989 5.0L HO pistons will work if you can find them. 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. Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. However, since Holten's car has an E303 cam, we didn't want the pistons and valves becoming too close, so we chose the 1.6 rockers. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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. T5 with 3.73s. 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. The GT40P heads flow a lot better than stock 351 heads. Here is my setup. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - anyone have experience with GT40P heads on a 92 351W - ive got a 92 F250 with a 351W that needs a pretty serious rebuild. The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. He'd be the best source. There are too many variables to add to this regarding aftermarket stroker kits or components. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. AFR 165cc 58cc Heads. Every thing he tells you on this site is true. GT40p heads peak horsepower was [email protected] with 363ft/[email protected] The worked 351 heads showed peak . will gt40p heads fit on a 302 | Ford Mustang Forum Well offer one as an example. It turned out we were conservative on both counts. by travis Sun May 03, 2020 8:33 am. I ran the Speed Pro L2488 pistons and it had me around 9.9 compression with a .041 head gasket, Now I had GT40 heads milled .020 and so that's just a guess on the CC. 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. (Please note these are not GT40P Explorer heads). 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. United Engine and Machine sells cheap but decent pistons that will do what you're wanting. 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. THANKS VERY MUCH! JEGS High Performance. Different years can have different combustion chamber sizes but ffor the most part there will be no performance increases by going with 302 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. 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! For the cherry on top of this Blue Oval desert, we bolted Mike Thermos' simple Powerstar plate nitrous system under the carburetor, installed the 140-hp jets (55 fuel and 55 nitrous), and used the trigger to retard the timing on the MSD ignition by 8 degrees. Manual trans. I am very happy too. This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. Shop by category. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. SB Ford GT40P Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. Speedmaster PCE281.2046 Small Block Ford Aluminum Cylinder Heads 62cc In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . 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. We need a build on a 400+ hp 302/6 build. .. i would not buy valves unless you need them amd would not switch to studs with these heads for your low hp . 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. ***Most important is theStupid question is the one that was never asked!*** Free shipping. He'll have to get a gear for his distributor. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. the springs are new stock oem ford. You didnt mention what camshaft you would be choosing or exactly which 5.0L Ford Windsor engine you are working with. are you twisted331 also? 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. Compare. Because of this, your tuneup will probably need to be modified. Mar 23, 2004. 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. A COMP hydraulic roller cam we found works well with this combination. 302 with GT40 heads | Ford Mustang Forums So . Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1.7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. For the first test, we were reusing the stock Explorer cam, so the engine didn't need any break-in time. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. 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). You can have your current 28 oz rebalanced to 50. I view the GT40P heads similar to Granada brakes. Let us explain. I got a GT40P off the assembly line years ago. Gt40/gt40p Heads On A 351w Questions - StangNet Compare. Now we know why Dennis Hilliard of Central Coast Mustang is so high on these heads. The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. There are literally a dozen or so camshaft companies that offer a mild hydraulic roller cam for a 5.0L Ford. Your IP: Late-model ford GT40 and GT40P heads with 1.84-inch intake valves will also flow 185 cfm at 0.50 . VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. JavaScript is disabled. For this reason, we're not sure what kind of boost the GT-40P heads will give. Test 2: Changed to the smaller of the two Lunati camshaftsno other changes. 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. Like I said lots of options. I have a 432 HP non Hi Po 289 I built. HiPo manifolds and Ill be good. 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. Ill do springs and a moderate cam and go for a good, dependable power plant. Install a set of 1.7:1 roller-tipped rocker arms on the heads. That's a good combo in my book. You can have your current 28 oz rebalanced to 50. There was an article in Hot Rod magazine in the mid '80's where Jon Kaase was developing 351w packages. E303 Cam advanced 4 degrees. Purchase any used aftermarket manifold for the 302 that is designed to function in the 3,500 to 6,500 power band. How to Build a Budget 383 Stroker Chevy How do I Increase Horsepower on a 440 Cylinder Head Specifications for a 1969 How to Get More Power Out of a 92 4.3 dragster engine image by Robert Young from, Copyright 2023 Leaf Group Ltd. / Leaf Group Media. this is the price for one head. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. Anythoughts? 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. 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. We also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. No-option stripper- I like strippers. Ford's seminal 302 engine (later re-dubbed the 5.0) has been popular with budget-minded hot rodders for decades. 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. hole size 302 is 7/16 and 351 is 1/2 Again, assuming this is a nearly stock 5.0L with stock heads, the Weiand Street Warrior dual plane intake and 600 cfm carburetor, its important to not become overly aggressive and choose a big camshaft. Ask Away! with Jeff Smith: Camshaft and Cylinder Head Recommendations Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. Enter your search keyword. Fastest e303 5.0l's? - FourEyedPride.com These are a great head but do need some machining mods to make they really work well. In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. Once the headers are in place, then you can consider if you still want more power. For both the GT40 and GT40p heads, I STRONGLY suggest upgrading the valve springs. That's an improvement of 22 hp over Test 2. Step 1. Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. Using the manufacturer recommended springs for your camshaft are a safe bet. I bought a crate 302 from Downs Ford a few years ago that was producing 320 hp. They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. A forum community dedicated to Ford Mustang owners and enthusiasts. The asterisk HP differences are calculated using Test 1's 294-hp peak. If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. (A starter is a motor, windshield wipers use a motor,electric windows use motors) Any one uses that terminology in my shop will be corrected once, only once. Depending on the Headers you have you might be okay. SB Ford GT40 Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. Thanks. For additional insurance, we also added a set of ARP head studs, which are stronger and offer better thread overlap than factory bolts, which helps prevent pulling threads out of a used block. timing and compression ratio with gt40p heads - Modded Mustang Forums I've not seen a set of longtubes that have an issue with GT40P's, either. This is needed for the steel roller cam. Took me 7 hours to do one head.but they cleaned up real nice. In review, we rescued a used 5.0L Ford from the boneyard, ported the heads, added a cam, carburetor, intake manifold, and headers, and pulled an amazing 376 hp out of the mix. The Fora platform includes forum software by XenForo. It's an 86 roller 5.0 engine that had a recent rebuild sometime in the past with keith black pistons, otherwise stock. They were located in Tahachapi CA, and were sold with upgraded springs for $650.00, back in 2002-2003 ish. However there are plenty of factory heads that with the help of an experienced machine shop can be great. All this is worth it. 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. Yep my **** is coming apart again Isnt life great! Just make sure it is a roller cam. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. $700.98. Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. I'm using the Trick Flow stage 1 cam with 1.7 roller rockers. We know what you're thinking--only two-tenths from an extra 45 hp? I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. That's fantastic for the minimal investment we made. Gt40p heads - FourEyedPride.com Trick Flow Mustang Valve Spring Upgrade Kit - Cast Iron Head (79-95) Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! . This is not a criticism but instead consider it to be more of a heads-up. The fix: basic power upgrades for a sluggish 302 Rowe studied engineering, philosophy and American literature at Central Florida Community College. Performance & security by Cloudflare. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS | What's New The cost of a new set of standard replacement roller lifters is very affordable at major retailers like Summit. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. T5z and 3.89 9" TL rear. 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. fuel injection system . How to Get More Horsepower Out of a Ford 289 | It Still Runs The later model distributors had a different diameter shaft than the earlier ones. people can stop saying that adding aftermarket cam with stock heads is a waste of time. Headers and a camshaft will help but the engine really needs aftermarket 3/8 inch connecting rod bolts and aftermarket cylinder heads. 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. I'll save the effort and lighten my front end by 50# with aluminum. Motor is going into a Ranger. Step 2. Some ideas never go out of style. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. We heated the bottle to 950 psi and hit the button at 4,500 rpm.

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