Here a comparison of different heads on a 302: I'm very happy with my GT40P. '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
Install a set of 1.7:1 roller-tipped rocker arms on the heads. 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. Long tube headers are a terrific idea, but you need to open up the exhaust side. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. All in all, the addition of GT-40P heads to any 5.0 Mustang is a worthwhile venture, especially if you're on a budget (aren't we all) or shooting for the Trophy Stock title. I'm using the Trick Flow stage 1 cam with 1.7 roller rockers. 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. 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. 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. Is asking advice for a fairly common situation involving parts with mandatory compatibility between the two for performance and longevity. 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. I added a link to it. http://vb.foureyedpride.com/showthread.php?t=89153, http://www.facebook.com/groups/233213650060739/, 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 combination of this cam with your intake and headers will produce a very nice street engine. Your email address will not be published. However I think the opportunity window is slowly closing. Then why did you port the heads and how do you know if you made an improvement. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . Required fields are marked *. Gasoline/Diesel all makes on earth & still doing it today with great pride.Feel free to contact me anytime. just curious. Obviously, tuneups will vary. 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. Assorted screwdrivers, pliers and vise-grips. The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. GT40s have 64cc chambers. The asterisk HP differences are calculated using Test 1's 294-hp peak. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. Over $2050 for the 165/185 renegades. For the first test, we were reusing the stock Explorer cam, so the engine didn't need any break-in time. Stock valve sizes? This test went so well that we were eager to see what the slightly bigger cam would do. 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. by travis Sun May 03, 2020 8:33 am. Well assume it is a 5.0L with stock heads. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. I guess I had it backwards, sorry about that, didn't mean to spread misinformation. Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! this head fits years 95-01 explorer mountaineer mercury mountaineer . 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? Mar 23, 2004. I have managed to get 402 horse power from a 289 hipo natural aspirated. the springs are new stock oem ford. Yea. Buy the lifters for peace of mind now and hopefully for the duration. 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. Some ideas never go out of style. I'm new and I'm 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. i'd love to use these heads,. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. Theres many options available for a little more power. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. At the dragstrip, we gained two-tenths and 2 mph. Paying a premium for a set of GT40P heads or dumping money into some to get their performance to rival aftermarket is not for me. Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. Sponsored. That said there are some better aftermarket options for heads also. Last Edit: January 18, 2015, 12:05:31 pm by businesstrader Logged shaunp. For both the GT40 and GT40p heads, I STRONGLY suggest upgrading the valve springs. The results were a major increase in power throughout the entire rev range, with an increase of 60hp at 4500rpm through to a peak of 279hp at 5800rpm. 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. 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. The hardest part of swapping the cam was just getting the timing cover off and back on again. Everything fits, use the stock rockers and pushrods. Well offer one as an example. And remember ENGINES have been being built/rebuilt/modified for years. I got a GT40P off the assembly line years ago. Well that article just got me very ancy, I want these heads!! The spark plug issue is almost a non-issue. I'd much rather be able to drive it at 8 or 9/10s of what it can handle. The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. I just read about this build on the corral.net. Compare. 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. Have fun, be safe, enjoy. They fill that spot between power and budget. An aggressive cam will wake it up a bit. Nice to see actual dyno results instead of "butt dyno" guesses. I turned it because it was tired when I got it. 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? Those are really good numbers. The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. But don't think that adding a bigger camshaft will make more power. We've already been motivated to put this engine in a buddy's Mustang. The later model distributors had a different diameter shaft than the earlier ones. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. (Please note these are not GT40P Explorer heads). 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. Ive been building ENGINES for 40+ years. 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. Not bad for off the shelf parts and a stock shortblock. 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. As with all head installations, check piston-to-valve clearance before final startup. Stock 1989 5.0L HO pistons will work if you can find them. Our recommendation would be, rather than change the camshaft, you might want to look into adding a set of long-tube headers and a dual exhaust if the engine is not already so equipped. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. 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've not seen a set of longtubes that have an issue with GT40P's, either. In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. K.S. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. You can use the stock roller lifters with any size cam you want. Their weak point is that the rotator used on the exhaust valve is very thick. They work, but present their own challenges. There are too many variables to add to this regarding aftermarket stroker kits or components. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. This combination should be good for about 400 horsepower and as much as 500 if you opt to use the stronger aftermarket pistons. I have to agree, the GT40P heads flow better than the GT40 iron heads. Holten runs the factory fan, but he had removed it when he ran the 12.63. We will go into more detail on the head mods in a later story in Junkyard Builder, so watch for it. Every thing he tells you on this site is true. Motor is going into a Ranger. This will keep you from dropping your overall static compression ratio and losing power. Im a different animal. HAD '82 GT monochromatic (red).black cloth HAVE Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! 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. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. 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. For the most part 302 heads and 351W heads are the same. The Fora platform includes forum software by XenForo. Aside from the cost of the nitrous itself, this setup should cost you little more than a stock rebuild using all brand new parts. We started with a 120,000-mile 5.0L out of a Ford Explorer, removed the EFI and DIS, and pocket ported the stock GT40P iron heads with stock valve sizes. I went to a couple in Tucson and almost all the Ford vehicles that came with a 5.0 had the heads missing. 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. 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. That's an improvement of 22 hp over Test 2. Most of them are aware of what changes need to be completed. I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. Limited header choice is certainly a challenge. GT 500; Posts: 8496; Location: Brisbane . Take the assembly to a machine shop to have it balanced and install it in the block. #1:::Throw out all your Magazines that suggest what to do! bmcdaniel, Feb 17, 2004 #7. v8maverick Member. 68stang351 Founding Member May 16, 2002 850 Ford offered a performance head that was a stock part on 1993-1995 Mustang Cobra models and pre- 1997-1/2 Ford Explorers and Mercury Mountaineers equipped with the 5.0 L engine called the GT-40 head (casting ID F3ZE-AA). Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! 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. Let us explain. Build Thread 1965 Fastback Project "Racesteed". +1 I would go with the regular GT40 heads. Definitely going to use my P heads. On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. GT40Ps have 58cc. A LOT of them do it these days. If you dont feel comfortable doing this higher a pro. Really hurt too. Yes- thank you. However there are plenty of factory heads that with the help of an experienced machine shop can be great. Cloudflare Ray ID: 7a2e2d95dedea1e4 Here is the lowdown on exhaust manifolds and VALVE SPRINGS. I have heard this rod bolt weakness myth for years but have yet to have a single problem with them in any of the SBF engines I have pounded on for the last 30 years and there have been lots of them. Ive bought wrecking yard SBFs and put 20 lbs of boost to them and spin them to 7000 and made 500 HP with several of them. 69-70 302 heads (the ones with the heart-shaped combustion chamber) Any early 289 heads for the chamber size (but you'll have small ports & valves w/all that CR) Flat Ernie, Aug 27, 2011 SHARE POST #8 fordfan289 Member from indiana correct me if Im wrong but cant you use 351c heads and get the same thing as a 302 boss. You'll have to plug the oil hole that is in the engine from the old oil dipstick. With the tuning finalized, the little cam made far more power than we expected, cranking out 328 lb-ft of torque at 4,200 and 294 hp at 5,400 rpm. Good on ya Jeff Smith. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? The reason for this is that we're actually replacing mildly worked E7TE heads. Also, the spark plug angle makes it a pain. 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. I got rid of the carburetor and went with a F.A.S.T. Free shipping for many products! GT40P heads, what kind of performance do they give? JEGS High Performance. Manual trans. If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. This is needed for the steel roller cam. Consider having the head's intake ports matched to the intake manifold gasket. Well also assume that this engine is running stock exhaust manifolds. This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. Nudge us with emails, and we'll make it happen. 97% Positive Feedback . Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. Most all long tubes come out far enough to clear and other short tube headers will work but there is clearance issues on two of the cylinders. 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. 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. For a better experience, please enable JavaScript in your browser before proceeding. 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.
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