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You gave me the info I was looking for, and I really do appreciate it. The combination of this cam with your intake and headers will produce a very nice street engine. This is needed for the steel roller cam. 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. 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. this head is complete with new 1.837 int valves and 1.536 exhaust valves. Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. It turned out we were conservative on both counts. 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. 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. Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? Worst AFR 165 dyno ever | Factory Five Racing Forum Keep in mind that swapping camshafts is a fairly extensive effort. For both the GT40 and GT40p heads, I STRONGLY suggest upgrading the valve springs. 68stang351 Founding Member May 16, 2002 850 I bought a crate 302 from Downs Ford a few years ago that was producing 320 hp. GT40P heads? how hard to put on? how much HP and torque? Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. by travis Sun May 03, 2020 8:33 am. The GT40P heads flow a lot better than stock 351 heads. 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 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. Limited header choice is certainly a challenge. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. Ha! Finally, we exchanged the Explorer's EFI manifold (which is a pretty good manifold in its own right) for an Edelbrock Performer RPM Air Gap intake and a Holley 750-cfm HP-style carburetor. 68 Mustang GT/CS Highland Green, PS, PB & Console, C Code w/C4 & 3.55 8 rear, If you aren't using the GT40P's stock, with maybe a spring upgrade and valve job, they aren't worth it anymore. If you smooth out the bowls and exhaust ports and gasket match the intakes they should flow decent. Theres many options available for a little more power. These engines came with the GT40P head, which even with its small valves, offers really good performance. 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 . $169.50. Small Block Ford 289/302/5.0L/351w 180cc/60cc Aluminum Cylinder Head E42004. Everything fits, use the stock rockers and pushrods. Building a 302-inch small-block to produce 400 hp is really no big deal, but doing. 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 for many products! Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. 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. Nudge us with emails, and we'll make it happen. .. i would not buy valves unless you need them amd would not switch to studs with these heads for your low hp . 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. 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. With nitrous, this is easily a mid-11-second ride. GT-40 heads HP increase | Mustang Forums at StangNet the springs are new stock oem ford. (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. Yea. 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. Then why did you port the heads and how do you know if you made an improvement. Compare. When building an engine there is a lot to take into consideration. Performance & security by Cloudflare. 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. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. Can I run the new cam with the same roller hydraulic lifters or do I have to change the lifters too? These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. As with Chevrolet's small-block engine, the aftermarket has had dozens of years to expand the range and reduce the cost of the parts they offer for this engine. Gt40/gt40p Heads On A 351w Questions - StangNet Trick Flow Mustang Valve Spring Upgrade Kit - Cast Iron Head (79-95) If I get different urges later, Ill pursue those then. Without changing the stock pistons. 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. The Fora platform includes forum software by XenForo. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. (Please note these are not GT40P Explorer heads). SBF engines are modified constantly. The Fora platform includes forum software by XenForo. I spin it to 6500 and thats about it. Save narve00 Buy the lifters for peace of mind now and hopefully for the duration. I have a 5.0 from a 1992 Mustang in my 65. Eldelbrocks Air Gap intake manifold should work well with the combination. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Ported Hurricane Single Plane and custom 750 HP. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. Holten runs the factory fan, but he had removed it when he ran the 12.63. JavaScript is disabled. This is the main reason why these engines are not modified as much as the small block Chevy. Real world data seems to show that GT40 or GT40P cylinder heads, assuming no other mods on your Foxbody, are good to add anywhere between 20-40 HP (over stock heads). Tim's junkyard refugee survived the beating and we had a bitchin' story. These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. 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 just read about this build on the corral.net. We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. 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 turned it because it was tired when I got it. 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. The hardest part of swapping the cam was just getting the timing cover off and back on again. No-option stripper- I like strippers. Along with the heads, we used MAC headers for GT-40P heads. 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. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. . Calculated compression to 9.8:1. The engine was only rated at 215 hp, but it at least had 9.0:1 compression. I have managed to get 402 horse power from a 289 hipo natural aspirated. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. Gt40p heads - FourEyedPride.com Features hardened 4140 Chromoly retainers, valve locks, spring shims, a spring height gauge, valve seals, and instructions. 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. The GTp heads are like GT 40's with smaller combustion chambers and the spark plugs are relocated for a more efficient burn. Early Windsors tend to have fairly restrictive exhaust manifolds, making the addition of a set of headers that much more efficient. These are a great head but do need some machining mods to make they really work well. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS. Because of this, your tuneup will probably need to be modified. GT40p heads peak horsepower was [email protected] with 363ft/[email protected] The worked 351 heads showed peak . Pretty sure that was name, but I could be wrong. Free shipping. However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. 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. (its not their engine) Junkyard Gt40p Heads-add 30+ Hp to Your 5.0l (For Free?) 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. Test 1: 750-cfm carburetor, dual-plane intake manifold, and stock camshaft. Like I said lots of options. 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. Here a comparison of different heads on a 302: I'm very happy with my GT40P. Not bad for off the shelf parts and a stock shortblock. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. Shop by category. JUNKYARD GT40P HEADS-ADD 30+ HP TO YOUR 5.0L (FOR FREE?) timing and compression ratio with gt40p heads - Modded Mustang Forums Your IP: 1983 Mustang G.T. The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. GT40P heads, 302 and Victor Jr. intake: - Factory Five Racing Forum The action you just performed triggered the security solution. I'm using the Trick Flow stage 1 cam with 1.7 roller rockers. The kit offers adjustable power from 50 to 250 hp with a simple jet change. 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. GT40 vs GT40P: Who has Smaller Chamber Volume ! More compression Last Edit: January 18, 2015, 12:05:31 pm by businesstrader Logged shaunp. As with all head installations, check piston-to-valve clearance before final startup. anyone have experience with GT40P heads on a 92 351W 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 got rid of the carburetor and went with a F.A.S.T. 351W D0OE-C heads better than GT40P\'s? - Ford Muscle Cars Tech Forum Long tube headers are a terrific idea, but you need to open up the exhaust side. They were located in Tahachapi CA, and were sold with upgraded springs for $650.00, back in 2002-2003 ish. 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. We did a quick search for hydraulic roller cams and landed on a COMP camshaft that looked promising. 1983 Mustang G.T. That's a good combo in my book. A good port job can set you back another $500-$1,000. LOW-BUCK 302 FORD HEAD UPGRADE - YouTube Those heads were unported and had stock valve sizes! people can stop saying that adding aftermarket cam with stock heads is a waste of time. Those are really good numbers. 302 .030 over with; Scat Forged Steel Rods, SpeedPro pistons and rings . 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. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. It's an 86 roller 5.0 engine that had a recent rebuild sometime in the past with keith black pistons, otherwise stock. I'm an old school guy (289 in 65 mustang), and I'm just looking into the new 5.0 engine (roller cam) stuff recently. This 1979-1995 Mustang cylinder head and camshaft guide will overview the heads and cams we offer and how they will coincide. SB Ford GT40 Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. We also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. 302HO with gt40p heads | Mustang Forums at StangNet He'd be the best source. GT40P heads, what kind of performance do they give? Fastest e303 5.0l's? - FourEyedPride.com If they are cheap enough, take them anyway. GT40 Heads On A 289? | Ford Muscle Cars Tech Forum 1.7 shaft rockers and beehives. Instructions on porting the GT-40p heads here. The only way to really make more power is to go with a stroker kit, blower and/or heads. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. 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. We are offering a pair of original Ford Cobra 5.0 GT40 cast iron cylinder heads. If you have a early 351W ie pre 76 it probably . Anyways, I know the gt40ps will bump . Richard Rowe has been writing professionally since 2007, specializing in automotive topics. Seriously though if you're not planning on an all-out attack for HP, I'd consider a forged piston out of Probe's SRS line-up. Where they differ is the combustion chamber size. I can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. Over $2050 for the 165/185 renegades. We need a build on a 400+ hp 302/6 build. Test 3: Installed the larger Lunati camagain, no other changes. Add 40 to 70 HP to your 302 yourself - Factory Five Racing Forum 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? just curious. how hard to put on? Dec 8, 2011. Yea. I'd much rather be able to drive it at 8 or 9/10s of what it can handle. 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. 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. This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. 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. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. I'm 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. 1 - 7 of 7 Posts. After a couple grand you have a killer set of heads, but there's got to be a less-expensive way of making horsepower. Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS | What's New Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. Both swaps made more sense when parts were readily available at the bone yard for cheap. Your email address will not be published. are you twisted331 also? 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. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. Sponsored. The Fora platform includes forum software by XenForo. I am working on a set of iron GT40s hoping it goes faster. made more power everytwhere and 40 hp is respectable. 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. On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. 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. Or, you could invest in a new set of heads that would also do the same job but you can expect to spend quite a bit more money. Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. The tube headers showed a gain of almost 100 hp! K.S. Well offer one as an example. Upgrading Fox Body Cylinder Heads - AmericanMuscle.com T5 with 3.73s. For the most part 302 heads and 351W heads are the same. While the heads were off getting a massage, we turned our attention to the cam timing. For a better experience, please enable JavaScript in your browser before proceeding. I added a link to it. A bit of info for those looking to build 300+hp 5.0L/302s Budget 300HP 302 Build I'm also have the regular GT40 heads on my current build. Is asking advice for a fairly common situation involving parts with mandatory compatibility between the two for performance and longevity. But what we were most impressed with was the solid gain in torque over the smaller Voodoo cam from 3,500 and up. 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'm sure the dyno operator used some goofball correction factor to make the numbers look higher. The heads got a 3 angle valve job, new valves from speed-pro and all the valve train was from crane that matched the current hydraulic cam. Now he serves as a regular contributor to OnAllCylinders. Never not once have I ever seen a SBF rod bolt create a failure. There are literally a dozen or so camshaft companies that offer a mild hydraulic roller cam for a 5.0L Ford. We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. '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 #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. Compare. The reply has so many assumptions that I cant even assume to know the answer. You can have your current 28 oz rebalanced to 50. In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. Understanding Ford's Fox Body GT40 Cylinder Heads - CJ Pony Parts Win or lose, if you buy the ticket you must take the ride. Well also assume that this engine is running stock exhaust manifolds. Free shipping. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. The entire front accessory drive and timing chain cover must be removed, along with the distributor and intake manifold. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. 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. ***Most important is theStupid question is the one that was never asked!*** The headers will improve this airflow throughout the entire rpm rangeadding more torque and horsepower. Building 400hp Into A 5.0L Small-Block Engine - MotorTrend 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. Get 500 Horsepower from a Junkyard Ford Explorer 302 - MotorTrend On slicks the car went some low 7.70s right at 90mph. The car weighs #2835 with driver. What would be the best cam and springs to use for these heads in a 302 Windsor? 950.00 us a set and will ship . A trip to Orlando Speed World provided us with updated quarter-mile times. If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. You didnt mention which cam you had in mind. I've got gt40p heads for it I'll be running, and can't afford better . JEGS High Performance. i'd love to use these heads,. 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. With no other changes we gained 25 hp using factory iron heads. Speedmaster PCE281.2046 Small Block Ford Aluminum Cylinder Heads 62cc Depends on the budget. Good on ya Jeff Smith. I am very happy too. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. 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. PTP Engineering front suspension and 25540R17s all around. Every thing he tells you on this site is true. What Are The GT40 & GT40P Heads? - LMR.com Different years can have different combustion chamber sizes but ffor the most part there will be no performance increases by going with 302 heads. Choose a cylinder head before you install the pistons. 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. Do you guys have part numbers for the spring kits? Assorted screwdrivers, pliers and vise-grips. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! There is a better way. 02-11-2012, 07:16 PM #6 fiveoh 86lx JavaScript is disabled. Step 1. 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. The older pushrod engines just dont offer the same kind of power potential for their displacement and it all has to do with cylinder head flow. This is what I recommend to everyone who is doing a budget 5.0 build. Overview. 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. Keywords 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. Motor is going into a Ranger. I'll prob take a trip up there this weekend after scavenging the junkyards, thanks a million. Good Luck. United Engine and Machine sells cheap but decent pistons that will do what you're wanting. Pride is built, in your garage, with your two hands. Ford Factory 5.0 Performance Cylinder Heads. The Edelbrock Performer RPM is a good choice, but Holley, Weiand and Ford Motorsport also have similar offerings. What you are trying to do is to increase the amount of airflow through the engine in order to make more power. A forum community dedicated to Ford Mustang owners and enthusiasts.
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