ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. 302 GT40 Dyno Results - FourEyedPride.com That's a 40 per cent increase in power from a simple head and cam swap, and one seriously happy Mustang owner! The GT40P heads flow a lot better than stock 351 heads. That's an improvement of 22 hp over Test 2. We set the timing to 34 degrees and rejetted the carburetor to get our desired 12.5:1 air/fuel ratio. $169.50. In a 3,250-pound car like a Mustang with 3.50 gears and an automatic with a 2,800-rpm converter, this 5.0L could pull 12.80s at 108 mph. It runs smooth but seems lazy. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. I guess I had it backwards, sorry about that, didn't mean to spread misinformation. We did a quick search for hydraulic roller cams and landed on a COMP camshaft that looked promising. If you have a early 351W ie pre 76 it probably . Ill do springs and a moderate cam and go for a good, dependable power plant. Very true about finding them at the local yards. 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. i'd love to use these heads,. Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. A forum community dedicated to Ford Mustang owners and enthusiasts. 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. by travis Sun May 03, 2020 8:33 am. Ford Factory 5.0 Performance Cylinder Heads. Save narve00 #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. I spin it to 6500 and thats about it. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. Yep my **** is coming apart again Isnt life great! Holley 670 street avenger carb. They were located in Tahachapi CA, and were sold with upgraded springs for $650.00, back in 2002-2003 ish. Well also assume that this engine is running stock exhaust manifolds. Pride is built, in your garage, with your two hands. And agree the cams do help and a few tricks with the heads that I have discovered really make a difference. JUNKYARD GT40P HEADS-ADD 30+ HP TO YOUR 5.0L (FOR FREE?) We gained 45 hp and 40 lb-ft of torque. And remember ENGINES have been being built/rebuilt/modified for years. What Are The GT40 & GT40P Heads? - LMR.com Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. I have managed to get 402 horse power from a 289 hipo natural aspirated. Yeah, out of a bolt on upgrade, you'd probably be looking at 260-280rwhp ish with supporting mods. Click to reveal Richard Rowe has been writing professionally since 2007, specializing in automotive topics. Yes- thank you. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. 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 love my setup and it is very strong engine. 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. 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. I have a 432 HP non Hi Po 289 I built. Mild Build Gt40p 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. AFR 165cc 58cc Heads. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. They work, but present their own challenges. Keywords - I have a 1989 f150 with a 302 5 spd. SB Ford, GT40 .575" Lift Max Output II Drop in Valve Spring Kit, Hyd Roller, 140 Lb Seat. The Fora platform includes forum software by XenForo. We've already been motivated to put this engine in a buddy's Mustang. It turned out we were conservative on both counts. (its not their engine) The Edelbrock Performer RPM is a good choice, but Holley, Weiand and Ford Motorsport also have similar offerings. 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. Mar 23, 2004. 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. Understanding Ford's Fox Body GT40 Cylinder Heads - CJ Pony Parts 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. That's fantastic for the minimal investment we made. As with all head installations, check piston-to-valve clearance before final startup. 1979 Indy 500 Pace Car. Cant wait to try um out. FORD GT40p 4 BAR HEADS IN GOOD CONDITION w/ONE BOLT BROKEN However I think the opportunity window is slowly closing. Do you guys have part numbers for the spring kits? It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. Im a different animal. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. The fix: basic power upgrades for a sluggish 302 Features hardened 4140 Chromoly retainers, valve locks, spring shims, a spring height gauge, valve seals, and instructions. Tim's junkyard refugee survived the beating and we had a bitchin' story. A forum community dedicated to Ford performance owners and enthusiasts. 331/347 stroker w/gt40p's, waste?Hp?cost involved? - Maverick I've not seen a set of longtubes that have an issue with GT40P's, either. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. Even with a stock Mustang 5.0 cam makes good power. 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 head fits years 95-01 explorer mountaineer mercury mountaineer . 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:?:!?!?!? Building 400hp Into A 5.0L Small-Block Engine - MotorTrend We also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. thats after 3 hours of idling/midrange hits to tune the idle and part throttle . A solid 300-325 hp should be plenty and that's with good drivability and reliability as well. Sponsored. 302HO with gt40p heads | Mustang Forums at StangNet 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. You can have your current 28 oz rebalanced to 50. This test went so well that we were eager to see what the slightly bigger cam would do. Step 2. Holten runs the factory fan, but he had removed it when he ran the 12.63. You'll have to plug the oil hole that is in the engine from the old oil dipstick. . 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. Dec 8, 2011. Everything fits, use the stock rockers and pushrods. just curious. I'd much rather be able to drive it at 8 or 9/10s of what it can handle. Anyways, I know the gt40ps will bump . Eldelbrocks Air Gap intake manifold should work well with the combination. I have a 5.0 from a 1992 Mustang in my 65. Compare. 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. With nitrous, this is easily a mid-11-second ride. JEGS High Performance. You can use the stock roller lifters with any size cam you want. 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. FULL DYNO RESULTS. GT40P Heads how much hp from them. - StangNet Stock Ford 351W 4bbl dyno numbers - Don Terrill's Speed-Talk All this is worth it. Never not once have I ever seen a SBF rod bolt create a failure. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. HAD '82 GT monochromatic (red).black cloth HAVE . (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. #1:::Throw out all your Magazines that suggest what to do! I'll save the effort and lighten my front end by 50# with aluminum. After graduating from Iowa State University with a journalism degree in 1978, he combined his two passions: cars and writing. I am very happy too. This will cost additional money but is still worth it, in our opinion. When building an engine there is a lot to take into consideration. 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. If they are cheap enough, take them anyway. 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. What you are trying to do is to increase the amount of airflow through the engine in order to make more power. Yea. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. gt40p heads on a 289 in a 66 | Vintage Mustang Forums 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 the first test, we were reusing the stock Explorer cam, so the engine didn't need any break-in time. 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. Motor is going into a Ranger. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! Runs well. Free shipping. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. OR you could put your automotive journalistic skills in motion by reporting on the many new modern components available for the latest generation 351 Cleveland. JavaScript is disabled. I was looking at putting on the GT40P heads on. check out the. Last Edit: January 18, 2015, 12:05:31 pm by businesstrader Logged shaunp. We will go into more detail on the head mods in a later story in Junkyard Builder, so watch for it. He'd be the best source. Not sure how they would mate up to your existing exhuast, but otherwise they should work. how much HP and torque? Here a comparison of different heads on a 302: I'm very happy with my GT40P. 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. If I get different urges later, Ill pursue those then. .. i would not buy valves unless you need them amd would not switch to studs with these heads for your low hp . bmcdaniel, Feb 17, 2004 #7. v8maverick Member. Its NA but makes use of AFR heads and some other aftermarket goodies. Every thing he tells you on this site is true. will gt40p heads fit on a 302 | Ford Mustang Forum No-option stripper- I like strippers. That said there are some better aftermarket options for heads also. The GTp heads are like GT 40's with smaller combustion chambers and the spark plugs are relocated for a more efficient burn. gt40p headers | Maverick/Comet Forums Ask Away! with Jeff Smith: Camshaft and Cylinder Head Recommendations $139.99. 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? LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. The only failures Ive had were timing chains and a couple broken rods in a mid 80s 302 with 200,000 miles on it that got about 35 lbs of boost stuffed into it when a pop off valve I bought on ebay failed. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads.
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