1986 Short block with notched pistons. 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. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 SBF OEM | eBay Motors, Parts & Accessories, Car & Truck Parts & Accessories | eBay! 68 XR7 & 68 M-100. The newer camshaft is designed for use with a soft bronze distributor gear, not the hardened steel gear used for older camshafts. Runs well. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. Location: Re: Stock Ford 351W 4bbl dyno numbers. 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. (Image/Harrison Creamery). This website is using a security service to protect itself from online attacks. thats after 3 hours of idling/midrange hits to tune the idle and part throttle . Good Luck. #1:::Throw out all your Magazines that suggest what to 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. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. how much HP and torque? Calculated compression to 9.8:1. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. The Fora platform includes forum software by XenForo. $169.50. A mild porting with gasket matching will be very good. Sure, you could race-port the existing E7 castings, which many have done, but then you're putting quite a bit of change into stock heads. 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. Upgrading Fox Body Cylinder Heads - AmericanMuscle.com The valve seats have been cut on a . Install a set of 1.7:1 roller-tipped rocker arms on the heads. bmcdaniel, Feb 17, 2004 #7. v8maverick Member. 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. Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. at the crank. I recall having an absolute blast with my old K-code coupe back in the day. I can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. Beyond the engine's amazingly good appearance, Moore had a couple of good reasons for choosing this engine. Sponsored. You didnt mention which cam you had in mind. 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. Using the manufacturer recommended springs for your camshaft are a safe bet. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. fordfan289, Aug 27, 2011 Also, the spark plug angle makes it a pain. We need a build on a 400+ hp 302/6 build. Never not once have I ever seen a SBF rod bolt create a failure. I just read about this build on the corral.net. We also added an Edelbrock Performer RPM dual-plane intake and a set of 158-inch headers with no mufflers. Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. We did a quick search for hydraulic roller cams and landed on a COMP camshaft that looked promising. Skip to main content. I'll prob take a trip up there this weekend after scavenging the junkyards, thanks a million. Every thing he tells you on this site is true. Max hp out of gt 40 heads | Mustang Evolution Forum The Fora platform includes forum software by XenForo. A bone stock 2bbl early 351w with stock replacement forged pistons (9.0 compression) and dyno headers made 211 Hp . Hey all, I'm working on building a 302 with my gt40p heads. 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:?:!?!?!? 302 GT40 Dyno Results - FourEyedPride.com Like I said lots of options. For this reason, we're not sure what kind of boost the GT-40P heads will give. GT40Ps have 58cc. 289 or 351 heads on a 302 advantage? | The H.A.M.B. 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. However there are plenty of factory heads that with the help of an experienced machine shop can be great. 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. Ford's seminal 302 engine (later re-dubbed the 5.0) has been popular with budget-minded hot rodders for decades. 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Rowe studied engineering, philosophy and American literature at Central Florida Community College. 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. The MPH was there to run a little better but the local track is about terrible. Depending on the Headers you have you might be okay. According to his data and verified dyno tests with an EFI 302, you can go above this level if you port the stock, lower intake manifold, or upgrade it altogether. On slicks the car went some low 7.70s right at 90mph. You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. Thank You. The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. 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. 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. Well offer one as an example. I love my setup and it is very strong engine. For real performance, stock E7TE heads leave a lot to be desired. Along with the heads, we used MAC headers for GT-40P heads. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - anyone have experience with GT40P heads on a 92 351W - ive got a 92 F250 with a 351W that needs a pretty serious rebuild. All Ford Mustangs | Model Specific Forums, GT-40P Heads - 5.0 Mustang & Super Fords Magazine. BONUS TEST-FOUR DIFFERENT 302 INTAKES.. These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. 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. Test 3: Installed the larger Lunati camagain, no other changes. Anyways, I know the gt40ps will bump . The cost of a new set of standard replacement roller lifters is very affordable at major retailers like Summit. 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. 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. 302 heads on 351w | ClassicBroncos.com Forum You keep stock drivability, and stock gas milage if you can stay out of boost. That's a good combo in my book. It took him and yours truly eight hours from start to finish, using air tools and a lift to gain access to the header flanges. Shop by category. GT40P heads, what kind of performance do they give? Richard Rowe has been writing professionally since 2007, specializing in automotive topics. Maybe I'll think about a cam swap? FORD GT40p 4 BAR HEADS IN GOOD CONDITION . Compare. Ford Explorer Mountaineer 5.0 Ohv Iron 302 Sbf 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. That said there are some better aftermarket options for heads also. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. As you might expect with more duration, the idle quality dropped significantly but was still able to make 11.5 inches of vacuum at 980 rpm. 302 .030 over with; Scat Forged Steel Rods, SpeedPro pistons and rings . After we installed the heads and with the fan off, he ran a 12.46 at 107.9. How much HP and torque do you think I. I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. 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! Is asking advice for a fairly common situation involving parts with mandatory compatibility between the two for performance and longevity. built one using a 91' HO short block with a set of AFR 165 heads, Weiand . 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. 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. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. Different years can have different combustion chamber sizes but ffor the most part there will be no performance increases by going with 302 heads. The reason for this is that we're actually replacing mildly worked E7TE heads. Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. Keywords A solid 300-325 hp should be plenty and that's with good drivability and reliability as well. Take the assembly to a machine shop to have it balanced and install it in the block. 302HO with gt40p heads | Mustang Forums at StangNet Mustang Cylinder Head & Camshaft Guide (79-95) - LMR 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. In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. . Test 2: Changed to the smaller of the two Lunati camshaftsno other changes. Supercharging GT40p heads | Modded Mustang Forums Let us explain. For the first test, we were reusing the stock Explorer cam, so the engine didn't need any break-in time. The only way to really make more power is to go with a stroker kit, blower and/or heads. anyone have experience with GT40P heads on a 92 351W Win or lose, if you buy the ticket you must take the ride. Nice to see actual dyno results instead of "butt dyno" guesses. Or just play it safe and let the fans ask away about another daring 5.0 TB bolt on or for an exciting surprise, do a LS______ fill in the blanks. Since the engine is nearly stock, we would want to choose a relatively mild camshaft with somewhat more lift and duration than stock, but again not going too aggressive. The kit offers adjustable power from 50 to 250 hp with a simple jet change. 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. 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. Choose a cylinder head before you install the pistons. GT40P heads? how hard to put on? how much HP and torque? They also have emissions legal heads as well. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. Adding the headers may also require a slight increase in secondary (and possibly primary) jetting to ensure the proper air-fuel ratio, but thats also an easy tuning change. Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. GT40p heads peak horsepower was [email protected] with 363ft/[email protected] The worked 351 heads showed peak . Without changing the stock pistons. For a better experience, please enable JavaScript in your browser before proceeding. This is just a quick overview of the changes that need to be done. Would have liked to see a comparison done on the same short block using a set of decently-ported early non-Thermactor iron heads Tracy Blackford, 65 Mustang FB, 331 built with 289 H beam rods and 383W piston, 282S cam, self ported '70 351w heads, Dougs Tri-Y headers. How to Build a Cheap Drag Racing 302 Ford Motor | It Still Runs 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. Ha! In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. ***Most important is theStupid question is the one that was never asked!*** Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! A COMP hydraulic roller cam we found works well with this combination. It turned out we were conservative on both counts. The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. All costing in the end at least another $2k. 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. Yeah, except those. a) ain't early and b) aren't 289 heads. A forum community dedicated to Ford performance owners and enthusiasts. how hard to put on? Step 1. Because of this, your tuneup will probably need to be modified. made more power everytwhere and 40 hp is respectable. LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? 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. 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. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. 69.90.139.244 We compare the GT40s to modern cylinder heads as well as other heads from the era. It's a classic move we've pulled off many times. The reply has so many assumptions that I cant even assume to know the answer. Thanks for the help, I was planning on puttingin roller rockers or at least new springs, and that engine looks great, hoppfully mine will look at least similar to that one of these days. They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. 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. There is a better way. The gt40p head is considered the best OEM 302 head made. Ford 302W / 5.0L History & Specifications - The Ranger Station Trick Flow Mustang Valve Spring Upgrade Kit - Cast Iron Head (79-95) Compare. many thanks to all you eco-hippies giving me dirty looks and helping me feel llike an overall badass rebel. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. That's a 40 per cent increase in power from a simple head and cam swap, and one seriously happy Mustang owner! 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. . Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. Once the headers are in place, then you can consider if you still want more power. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. SBF engines are modified constantly. We set the timing to 34 degrees and rejetted the carburetor to get our desired 12.5:1 air/fuel ratio. The "P" heads flow better. Features hardened 4140 Chromoly retainers, valve locks, spring shims, a spring height gauge, valve seals, and instructions. the engine is carburated of that makes a difference. Stock valve sizes? If you wanted to make your engine feel strong, these would be a decent investment, but they will require some modifications. Shop by category. Last Edit: January 18, 2015, 12:05:31 pm by businesstrader Logged shaunp. For 2018, the Coyote makes 460 hp. gt40p heads on a 289 in a 66 | Vintage Mustang Forums How to Get More Horsepower Out of a Ford 289 | It Still Runs The hardest part of swapping the cam was just getting the timing cover off and back on again. 1 - 7 of 7 Posts. 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. Really hurt too. The longer duration created a slight loss of torque below 3,300 rpm compared to both previous cams, but beyond that mild loss of power, the bigger Voodo out-powered its smaller cousin, cranking out a peak torque of 355 lb-ft at 4,300 (a gain of 7 lb-ft over Test 2) and charging to a peak horsepower of 376 at 6,000 rpm. A forum community dedicated to Ford Mustang owners and enthusiasts. Assorted screwdrivers, pliers and vise-grips. 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. Assuming this will be a daily driver engine, a short duration camshaft, especially when combined with a four-barrel dual plane intake manifold and headers, will deliver extremely snappy throttle response and the whole combination will increase the torque and peak horsepower by somewhere in the neighborhood of 20 to perhaps 35 horsepower. Gt40/gt40p Heads On A 351w Questions - StangNet In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . (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. 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. Im now thinking of adding a cam to match the carb. There are caveats to this plan, however. After a couple grand you have a killer set of heads, but there's got to be a less-expensive way of making horsepower. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. While we've seen engine dyno tests performed with GT-40P heads replacing factory E7TE castings and resulting in a boost of more than 25 hp, we have reluctantly set our horsepower gain goal at 25 ponies, as well. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS | What's New Well also assume that this engine is running stock exhaust manifolds. 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. Also, you'll need to get a steel distributor gear to replace the iron gear that is currently on your distributor. This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. 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 heads flow a lot better than stock 351 heads. 331/347 stroker w/gt40p's, waste?Hp?cost involved? - Maverick Yea. After graduating from Iowa State University with a journalism degree in 1978, he combined his two passions: cars and writing. 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. 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. And have discovered something that I dont think anyone else knows. 302 with GT40 heads | Ford Mustang Forums JavaScript is disabled. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. Dyno results GT40P heads | Vintage Mustang Forums Not looking for crazy HP. The Fora platform includes forum software by XenForo. Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. 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. An aggressive cam will wake it up a bit. That's fantastic for the minimal investment we made. He'll have to get a gear for his distributor. What Cam and Springs to Use for GT40 Heads When combined with modern power-makers, such as nitrous, the 302 is more than capable of producing 400+ horsepower for little more than the cost of a stock engine rebuild. 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 bought a crate 302 from Downs Ford a few years ago that was producing 320 hp. Then why did you port the heads and how do you know if you made an improvement. 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 Their weak point is that the rotator used on the exhaust valve is very thick. 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. It runs smooth but seems lazy. I have been working on Fords for 40 years and I have experimented with a few tricks of my own. I got lucky and found a complete Explorer GT40P engine online. Those heads were unported and had stock valve sizes! If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. Just got through porting one of my gt40p heads today. You gave me the info I was looking for, and I really do appreciate it. 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. Because its all been done time after time after. Check my post above. I have a 432 HP non Hi Po 289 I built. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. GT40, GT40P, would be great factory heads. 351W D0OE-C heads better than GT40P\'s? - Ford Muscle Cars Tech Forum 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. Gt40 heads/intake from a jy explorer, leave the . At the dragstrip, we gained two-tenths and 2 mph.
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