Required fields are marked *. These are some of the pictures I have showing the Explorer manifolds. We did a quick search for hydraulic roller cams and landed on a COMP camshaft that looked promising. The asterisk HP differences are calculated using Test 1's 294-hp peak. . . Take the assembly to a machine shop to have it balanced and install it in the block. GT40p heads peak horsepower was [email protected] with 363ft/[email protected] The worked 351 heads showed peak . Im a different animal. Compare. There is a better way. You'll have to plug the oil hole that is in the engine from the old oil dipstick. I turned it because it was tired when I got it. Calculated compression to 9.8:1. GT40s have 64cc chambers. I have a very good running stock 1981 302 in a F100 short box. Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. Compare. Good Luck. Well offer one as an example. The spark plug issue is almost a non-issue. Well also assume that this engine is running stock exhaust manifolds. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Dec 8, 2011. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. You should be able to get away with a 150 to 200 horsepower shot later, but it's best to start out small and work up. Click to reveal I got lucky and found a complete Explorer GT40P engine online. For the most part 302 heads and 351W heads are the same. As usual, there is much more to this story. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. Well that article just got me very ancy, I want these heads!! Over $2050 for the 165/185 renegades. 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. Im 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. that is a healthy budget deal. FULL DYNO RESULTS. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. Performance & security by Cloudflare. If you have a early 351W ie pre 76 it probably . Win or lose, if you buy the ticket you must take the ride. 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? A forum community dedicated to Ford Mustang owners and enthusiasts. A good port job can set you back another $500-$1,000. A solid 300-325 hp should be plenty and that's with good drivability and reliability as well. 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. I had a set of 69 302 heads I ran for a while . 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. 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. HAD '82 GT monochromatic (red).black cloth HAVE Keywords Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. Obviously, tuneups will vary. An aggressive cam will wake it up a bit. Anythoughts? You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. 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. Tim's junkyard refugee survived the beating and we had a bitchin' story. . Best of all, no machining is required to install these on your stock cast iron heads! Build Thread 1965 Fastback Project "Racesteed". K.S. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. Limited header choice is certainly a challenge. And agree the cams do help and a few tricks with the heads that I have discovered really make a difference. people can stop saying that adding aftermarket cam with stock heads is a waste of time. 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! I don't need tons of power to enjoy the car. I am very happy too. First, adding headers will improve power on the existing combination. 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. 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. K.S. Without changing the stock pistons. Because of this, your tuneup will probably need to be modified. 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. We bolted the Ford to the dyno with a set of 158-inch long-tube headers and an 18-inch collector extension to help the low-speed torque, then we fired up the small-block. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. What you are trying to do is to increase the amount of airflow through the engine in order to make more power. The GT40P cylinder heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. We turned to Rare Auto Design in Orlando for dyno tests to find out how much horsepower we gained. 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). 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. GT 500; Posts: 8496; Location: Brisbane . Gt40 heads/intake from a jy explorer, leave the . Maybe I'll think about a cam swap? Your email address will not be published. GT40, GT40P, would be great factory heads. fordfan289, Aug 27, 2011 For both the GT40 and GT40p heads, I STRONGLY suggest upgrading the valve springs. The SUV indicated barely 120,000 on the clock, and after yanking the valve covers to judge the engine's condition, Tim Moore instantly made the decision to do the boneyard version of a smash-and-grab. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. What did the heads flow? VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. They suffered from poor aftermarket support up until about 15 years ago when it really came on strong. 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. #1:::Throw out all your Magazines that suggest what to do! Be careful, I was once bitten by one of those reptile engine builders. With gt40p heads and 289 hipo exhaust manifolds changing sparkplugs is the same as the original 302 heads and manifolds, I use the spark plugs that are recomended for the explorer with gt40p heads and you can use straight or angled boots. I spin it to 6500 and thats about it. They almost seem like flywheel numbers rather than RWHP numbers. Not bad for off the shelf parts and a stock shortblock. 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. 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. Then why did you port the heads and how do you know if you made an improvement. We decided on a Powerstar kit from Nitrous Supply, owned by our good friend Mike Thermos, who was one of the original nitrous kit suppliers back in the early '80s. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS. The cost of a new set of standard replacement roller lifters is very affordable at major retailers like Summit. 302 .030 over with; Scat Forged Steel Rods, SpeedPro pistons and rings . I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. are you twisted331 also? 68 XR7 & 68 M-100. Definitely going to use my P heads. Even with a stock Mustang 5.0 cam makes good power. For a better experience, please enable JavaScript in your browser before proceeding. Is asking advice for a fairly common situation involving parts with mandatory compatibility between the two for performance and longevity. 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. Free shipping for many products! 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. Through Central Coast you can have the heads fully prepped for your combination. this head fits years 95-01 explorer mountaineer mercury mountaineer . Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. Not sure how they would mate up to your existing exhuast, but otherwise they should work. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. But dont think that adding a bigger camshaft will make more power. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The MPH was there to run a little better but the local track is about terrible. I love my setup and it is very strong engine. 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. Both swaps made more sense when parts were readily available at the bone yard for cheap. While the heads were off getting a massage, we turned our attention to the cam timing. If you know him, ask him. ***Most important is theStupid question is the one that was never asked!*** If you dont feel comfortable doing this higher a pro. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. These are Ford iron GT-40P heads. Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. Anyways, I know the gt40ps will bump . JavaScript is disabled. These engines came with the GT40P head, which even with its small valves, offers really good performance. .. i would not buy valves unless you need them amd would not switch to studs with these heads for your low hp . Its funny no one mentioned anything about ignition timing or components, Your email address will not be published. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Rowe studied engineering, philosophy and American literature at Central Florida Community College. All costing in the end at least another $2k. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. After a couple grand you have a killer set of heads, but there's got to be a less-expensive way of making horsepower. The engine never huffed oil out of the breathers, and the spark plugs all looked excellent. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. 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'm using the Trick Flow stage 1 cam with 1.7 roller rockers. What would be the best cam and springs to use for these heads in a 302 Windsor? I'd much rather be able to drive it at 8 or 9/10s of what it can handle. 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! So . Cloudflare Ray ID: 7a2e2d95dedea1e4 As with all head installations, check piston-to-valve clearance before final startup. The hardest part of swapping the cam was just getting the timing cover off and back on again. Ive been building ENGINES for 40+ years. 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. T5z and 3.89 9" TL rear. Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. Free shipping. #3::: Do your homework,get quality parts,dont skimp. This is the main reason why these engines are not modified as much as the small block Chevy. . In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. I must agree with Jeff Smith. +1 I would go with the regular GT40 heads. If they are cheap enough, take them anyway. I guess I had it backwards, sorry about that, didn't mean to spread misinformation. Runs well. These heads have been remanufactured using refaced reclaimed Factory Valves. THANKS VERY MUCH! made more power everytwhere and 40 hp is respectable. A mild porting with gasket matching will be very good. Those are really good numbers. This is an older thread, you may not receive a response, and could be reviving an old thread. The GT40P heads flow a lot better than stock 351 heads. Im new and Im 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. The 2 heads are about the same when looking at the numbers with the GT40p heads having a slight edge. Calculating pushrod length Holley 670 street avenger carb. As noted, this is looking like hes building a 351 Lightning truck motor, which is a good way to go. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. And have discovered something that I dont think anyone else knows. could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. The GT40 heads have thermactor holes built in to connect to the EGR/smog equipment whereas the GT40P heads use an external EGR connective system. The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. You didnt mention what camshaft you would be choosing or exactly which 5.0L Ford Windsor engine you are working with. This 1979-1995 Mustang cylinder head and camshaft guide will overview the heads and cams we offer and how they will coincide. 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. 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. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 SBF OEM | eBay Motors, Parts & Accessories, Car & Truck Parts & Accessories | eBay! JavaScript is disabled. If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. 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. These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings.
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