Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. Your email address will not be published. I turned it because it was tired when I got it. Sponsored. Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow. T5z and 3.89 9" TL rear. 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. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members). A forum community dedicated to Ford performance owners and enthusiasts. Yes Mr.Smith, your column here at OAC adorned with extreme performance without power adders, or all Engine as its known, from a superior pushrod Small Block featuring almost all USA sourced modern components with the familiar smell of Ford Blue. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. 1986 Short block with notched pistons. Its NA but makes use of AFR heads and some other aftermarket goodies. You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. The spark plug issue is almost a non-issue. For a better experience, please enable JavaScript in your browser before proceeding. When compared to the new generation of performance engines on the market today like the 5.0L DOHC Coyote engine, your engine will not come close. 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. Boy, were we surprised with the results. Here a comparison of different heads on a 302: I'm very happy with my GT40P. Compare. Yes- thank you. The tube headers showed a gain of almost 100 hp! 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. GT40P heads, 302 and Victor Jr. intake: - Factory Five Racing Forum (Please note these are not GT40P Explorer heads). Best of all, no machining is required to install these on your stock cast iron heads! I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. Assorted screwdrivers, pliers and vise-grips. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. Mustang Cylinder Head & Camshaft Guide (79-95) - LMR No-option stripper- I like strippers. 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. $930.00 + $55.00 shipping. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? SB Ford, GT40 .575" Lift Max Output II Drop in Valve Spring Kit, Hyd Roller, 140 Lb Seat. Required fields are marked *. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. Stock 1989 5.0L HO pistons will work if you can find them. But what we were most impressed with was the solid gain in torque over the smaller Voodoo cam from 3,500 and up. 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. Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. Those heads were unported and had stock valve sizes! I have a 5.0 from a 1992 Mustang in my 65. I spin it to 6500 and thats about it. Worst AFR 165 dyno ever | Factory Five Racing Forum If you know him, ask him. 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. They fill that spot between power and budget. Get 500 Horsepower from a Junkyard Ford Explorer 302 - MotorTrend I love my setup and it is very strong engine. GT40s have 64cc chambers. What would be the best cam and springs to use for these heads in a 302 Windsor? 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. this is the price for one head. Stock Ford 351W 4bbl dyno numbers - Don Terrill's Speed-Talk 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. Nice to see actual dyno results instead of "butt dyno" guesses. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. 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! I had those on my car before I upgraded and they were nice 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. 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. Every thing he tells you on this site is true. 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. 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. 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. SBF engines are modified constantly. Along with the heads, we used MAC headers for GT-40P heads. Compare. GT40, GT40P, would be great factory heads. Maybe I'll think about a cam swap? 1983 Mustang G.T. Gt40/gt40p Heads On A 351w Questions - StangNet Posted on May 07, 2014 by promarengine. Dec 8, 2011. What Are The GT40 & GT40P Heads? - LMR.com LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? I got lucky and found a complete Explorer GT40P engine online. Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. You didnt mention which cam you had in mind. Gt40p heads - FourEyedPride.com Pride is built, in your garage, with your two hands. At the dragstrip, we gained two-tenths and 2 mph. 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. I have been working on Fords for 40 years and I have experimented with a few tricks of my own. Sponsored. *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. thats after 3 hours of idling/midrange hits to tune the idle and part throttle . And agree the cams do help and a few tricks with the heads that I have discovered really make a difference. The headers will improve this airflow throughout the entire rpm rangeadding more torque and horsepower. Small Block Ford 289/302/5.0L/351w 180cc/60cc Aluminum Cylinder Head E42004. (its not their engine) Ford Factory 5.0 Performance Cylinder Heads. built one using a 91' HO short block with a set of AFR 165 heads, Weiand . The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. We also discovered some issues with the GT40P heads that required changes, so we added valves from Manley that eliminated the exhaust-valve rotators and allowed us to set the proper valvespring installed height. Be careful, I was once bitten by one of those reptile engine builders. Holten runs the factory fan, but he had removed it when he ran the 12.63. The hardest part of swapping the cam was just getting the timing cover off and back on again. Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. The Fora platform includes forum software by XenForo. With. I've not seen a set of longtubes that have an issue with GT40P's, either. I wouldnt recommend reusing lifters though. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. But dont think that adding a bigger camshaft will make more power. Well offer one as an example. 302 heads on 351w | ClassicBroncos.com Forum 1983 Mustang G.T. The reason for this is that we're actually replacing mildly worked E7TE heads. The GTp heads are like GT 40's with smaller combustion chambers and the spark plugs are relocated for a more efficient burn. how hard to put on? Gt40 heads/intake from a jy explorer, leave the . One benefit gt40P head will have over other 80's-90's model heads, including the gt40 head, is that it has a smaller combustion chamber much like the original 289 heads. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. Anythoughts? will gt40p heads fit on a 302 | Ford Mustang Forum This will keep you from dropping your overall static compression ratio and losing power. 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. Do not ever, ever think about using the tube type manifolds. It's a classic move we've pulled off many times. That's a good combo in my book. Manual trans. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! They also have emissions legal heads as well. 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. 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 had a set of 69 302 heads I ran for a while . Very true about finding them at the local yards. 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. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. You can use the stock roller lifters with any size cam you want. I added a link to it. This is just a quick overview of the changes that need to be done. 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. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. Check my post above. by travis Sun May 03, 2020 8:33 am. Eldelbrocks Air Gap intake manifold should work well with the combination. First, adding headers will improve power on the existing combination. PTP Engineering front suspension and 25540R17s all around. When building an engine there is a lot to take into consideration. Yeah, except those. a) ain't early and b) aren't 289 heads. 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 gt40p head is considered the best OEM 302 head made. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. We set the timing to 34 degrees and rejetted the carburetor to get our desired 12.5:1 air/fuel ratio. that is a healthy budget deal. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? I guess I had it backwards, sorry about that, didn't mean to spread misinformation. (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. #3::: Do your homework,get quality parts,dont skimp. I am working on a set of iron GT40s hoping it goes faster. Do you guys have part numbers for the spring kits? All costing in the end at least another $2k. In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . 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. Works on all factory cast iron E7, GT40, and GT40P cylinder heads! . 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. 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 . I recall having an absolute blast with my old K-code coupe back in the day. If they are cheap enough, take them anyway. You can have your current 28 oz rebalanced to 50. I'm sure the dyno operator used some goofball correction factor to make the numbers look higher. Mild Build Gt40p 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. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. 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. As a matter of fact, Central Coast has an '89 coupe with GT-40P heads that has run a best of 11.98 in the quarter-mile. Free shipping. I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. With the P-heads requiring pedestal-mount rockers, we also called up Crane Cams for a set of 1.6 pedestal-mount roller rockers. If I get different urges later, Ill pursue those then. How to Build a Cheap Drag Racing 302 Ford Motor | It Still Runs He'll have to get a gear for his distributor. Well that article just got me very ancy, I want these heads!! These are some of the pictures I have showing the Explorer manifolds. Your IP: Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. That said there are some better aftermarket options for heads also. The newer camshaft is designed for use with a soft bronze distributor gear, not the hardened steel gear used for older camshafts. 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. Mac and Ford Motorsport both make a GT40P spacific header.

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