The GT40P cylinder heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. If this is beyond your technical ability, you could ask a local machine shop to perform the modifications. So . But the part about a cam replacement possibly being a labor intensive undertaking is correct. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. this head fits years 95-01 explorer mountaineer mercury mountaineer . We compare the GT40s to modern cylinder heads as well as other heads from the era. 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. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. They work, but present their own challenges. 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. are you twisted331 also? This is needed for the steel roller cam. 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. 69.90.139.244 In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. As with all head installations, check piston-to-valve clearance before final startup. For a better experience, please enable JavaScript in your browser before proceeding. 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. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. 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. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? You can email the site owner to let them know you were blocked. Like I said lots of options. Ha! When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. I need that part number too! In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. For the most part 302 heads and 351W heads are the same. How much HP and torque do you think I. Do you guys have part numbers for the spring kits? There are literally a dozen or so camshaft companies that offer a mild hydraulic roller cam for a 5.0L Ford. I'll save the effort and lighten my front end by 50# with aluminum. Never not once have I ever seen a SBF rod bolt create a failure. We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. 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). The only one that's close, is #7. Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. Buy the lifters for peace of mind now and hopefully for the duration. Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow. We set the timing to 34 degrees and rejetted the carburetor to get our desired 12.5:1 air/fuel ratio. Yes- thank you. In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. PTP Engineering front suspension and 25540R17s all around. Nudge us with emails, and we'll make it happen. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. 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. And agree the cams do help and a few tricks with the heads that I have discovered really make a difference. The Fora platform includes forum software by XenForo. This is the main reason why these engines are not modified as much as the small block Chevy. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. Headers and a camshaft will help but the engine really needs aftermarket 3/8 inch connecting rod bolts and aftermarket cylinder heads. fuel injection system . '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 - I have a 1989 f150 with a 302 5 spd. There is a better way. I got lucky and found a complete Explorer GT40P engine online. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. HiPo manifolds and Ill be good. Shop by category. just curious. Compare. 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've got gt40p heads for it I'll be running, and can't afford better . The "P" heads flow better. 1 - 7 of 7 Posts. There are a lot of variables that must be addressed to give a better estimate, but a good basic estimate is 20-40 HP at the crank. This 1979-1995 Mustang cylinder head and camshaft guide will overview the heads and cams we offer and how they will coincide. If I get different urges later, Ill pursue those then. However I think the opportunity window is slowly closing. JUNKYARD GT40P HEADS-ADD 30+ HP TO YOUR 5.0L (FOR FREE?) The engine was only rated at 215 hp, but it at least had 9.0:1 compression. Don't let the fact that the iron GT40 heads have a larger exhaust valve fool you. The specs are a conservative 212/218 degrees of duration at 0.050-inch tappet lift but offer a really nice 0.512-inch valve lift for both the intake and exhaust. 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. SB Ford GT40 Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. 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. 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. Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. T5z and 3.89 9" TL rear. 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. Application Fits 1979-95 Mustang 302/351 w/ OEM Small Block Ford Heads Features hardened 4140 Chromoly retainers, valve locks, spring shims, a spring height gauge, valve seals, and instructions. Dec 8, 2011. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members). However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. For those of you running a carb, or aftermarket intake, you already have a leg up in this area and should see even greater gains in power. Every thing he tells you on this site is true. The GT40P heads flow a lot better than stock 351 heads. I got a GT40P off the assembly line years ago. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. $700.98. Compare. ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. It's a classic move we've pulled off many times. this head is complete with new 1.837 int valves and 1.536 exhaust valves. For a better experience, please enable JavaScript in your browser before proceeding. 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. With no other changes we gained 25 hp using factory iron heads. You keep stock drivability, and stock gas milage if you can stay out of boost. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. Your email address will not be published. The cost of a new set of standard replacement roller lifters is very affordable at major retailers like Summit. A bone stock 2bbl early 351w with stock replacement forged pistons (9.0 compression) and dyno headers made 211 Hp . GT40Ps have 58cc. 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. He'd be the best source. This is not a criticism but instead consider it to be more of a heads-up. If you're running a stock cam, 1.7 rockers will work perfectly. Sponsored. No-option stripper- I like strippers. GT40P heads, what kind of performance do they give? The car weighs #2835 with driver. 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. 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. As usual, there is much more to this story. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Not bad for off the shelf parts and a stock shortblock. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. They almost seem like flywheel numbers rather than RWHP numbers. Well offer one as an example. I'm sure the dyno operator used some goofball correction factor to make the numbers look higher. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. You'll have to plug the oil hole that is in the engine from the old oil dipstick. We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. I have a 302 Windsor V8 EFI engine that I converted to a 600 cfm carburetor with a Street Warrior intake manifold. This will cost additional money but is still worth it, in our opinion. 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. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. Yea. Manual trans. Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1.7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. After we installed the heads and with the fan off, he ran a 12.46 at 107.9. 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. Is asking advice for a fairly common situation involving parts with mandatory compatibility between the two for performance and longevity. SBF engines are modified constantly. Free shipping. 302, GT40P Heads, E cam, 4 into 4, Holley 600, Mallory Unilite, Levy SD T5, 3.73, 15" Team III, firewall mod, trunk mod, trailer hitch, drivers foot box mod, front tow rings. 02-11-2012, 07:16 PM #6 fiveoh 86lx You can use the stock roller lifters with any size cam you want. All costing in the end at least another $2k. many thanks to all you eco-hippies giving me dirty looks and helping me feel llike an overall badass rebel. 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. These are a great head but do need some machining mods to make they really work well. Related Resources Mustang Generation Nicknames: What Do They Mean? Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Win or lose, if you buy the ticket you must take the ride. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! A mild porting with gasket matching will be very good. The Edelbrock Performer RPM is a good choice, but Holley, Weiand and Ford Motorsport also have similar offerings. If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. Take the assembly to a machine shop to have it balanced and install it in the block. This test went so well that we were eager to see what the slightly bigger cam would do. thats after 3 hours of idling/midrange hits to tune the idle and part throttle . I have managed to get 402 horse power from a 289 hipo natural aspirated. Holley 670 street avenger carb. I must agree with Jeff Smith. 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. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. Nice to see actual dyno results instead of "butt dyno" guesses. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. Install a set of 1.7:1 roller-tipped rocker arms on the heads. Yeah, out of a bolt on upgrade, you'd probably be looking at 260-280rwhp ish with supporting mods. 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. 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:?:!?!?!? I'm also have the regular GT40 heads on my current build. They fill that spot between power and budget. I have a 5.0 from a 1992 Mustang in my 65. For a better experience, please enable JavaScript in your browser before proceeding. 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. 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. 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. I have a very good running stock 1981 302 in a F100 short box. The MPH was there to run a little better but the local track is about terrible. Even with a stock Mustang 5.0 cam makes good power. Eldelbrocks Air Gap intake manifold should work well with the combination. Without changing the stock pistons. 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. Calculated compression to 9.8:1. Compare. We are offering a pair of original Ford Cobra 5.0 GT40 cast iron cylinder heads. Tim's junkyard refugee survived the beating and we had a bitchin' story. What did the heads flow? I'd much rather be able to drive it at 8 or 9/10s of what it can handle. T5 with 3.73s. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. A forum community dedicated to Ford performance owners and enthusiasts. Then why did you port the heads and how do you know if you made an improvement. is milkfish good for kidney disease, married dr fernando gomes pinto wife, baker double barrel shotgun parts,
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