Where they differ is the combustion chamber size. This is a function of the somewhat wider lobe-separation angle of 112 degrees. This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. PTP Engineering front suspension and 25540R17s all around. But dont think that adding a bigger camshaft will make more power. I had a set of 69 302 heads I ran for a while . 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. 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. Some ideas never go out of style. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. I got lucky and found a complete Explorer GT40P engine online. Skip to main content. 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. I ran the Speed Pro L2488 pistons and it had me around 9.9 compression with a .041 head gasket, Now I had GT40 heads milled .020 and so that's just a guess on the CC. The GT40P heads flow a lot better than stock 351 heads. Plus you will need to drill all the head bolt holes out as the 351W uses larger head bolts. This time around, we chose a shining example of this junkyard art form. I recall having an absolute blast with my old K-code coupe back in the day. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 Now he serves as a regular contributor to OnAllCylinders. '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 But the part about a cam replacement possibly being a labor intensive undertaking is correct. 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. You gave me the info I was looking for, and I really do appreciate it. Compare. Sponsored. A good port job can set you back another $500-$1,000. What Cam and Springs to Use for GT40 Heads 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. Trick Flow Mustang Valve Spring Upgrade Kit - Cast Iron Head (79-95) 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. I'm sure the dyno operator used some goofball correction factor to make the numbers look higher. Always the weak area in the 289 and 302 is the tiny 5/16 inch connecting rod bolts and the miniscule intake and exhaust ports. Location: Re: Stock Ford 351W 4bbl dyno numbers. GT40Ps have 58cc. These are some of the pictures I have showing the Explorer manifolds. 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! How to Get More Horsepower Out of a Ford 289 | It Still Runs If you have a early 351W ie pre 76 it probably . We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. I can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. Within a few hours of his discovery, the engine was sitting in the back of his truck on its way to a new home. JavaScript is disabled. 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. If you're running a stock cam, 1.7 rockers will work perfectly. Depending on the Headers you have you might be okay. A mild porting with gasket matching will be very good. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. MAC is the only manufacturer of these headers, and the parts we installed fit like a glove with no problems whatsoever. 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. Building 400hp Into A 5.0L Small-Block Engine - MotorTrend by travis Sun May 03, 2020 8:33 am. 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. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. (Image/Harrison Creamery). HAD '82 GT monochromatic (red).black cloth HAVE 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. United Engine and Machine sells cheap but decent pistons that will do what you're wanting. The reply has so many assumptions that I cant even assume to know the answer. Once the headers are in place, then you can consider if you still want more power. This is needed for the steel roller cam. I must agree with Jeff Smith. SBF engines are modified constantly. All costing in the end at least another $2k. We need a build on a 400+ hp 302/6 build. 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. Let us explain. When I purchased my "brand new" set of GT40P's, I bought them from an Mustang specific machine shop that used to exist called Central Coast Mustang. K.S. The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. Win or lose, if you buy the ticket you must take the ride. Dec 8, 2011. Rowe studied engineering, philosophy and American literature at Central Florida Community College. Install a set of 1.7:1 roller-tipped rocker arms on the heads. Joined . I bought a crate 302 from Downs Ford a few years ago that was producing 320 hp. Holten runs the factory fan, but he had removed it when he ran the 12.63. 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. $139.99. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. Along with the heads, we used MAC headers for GT-40P heads. JavaScript is disabled. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. For a better experience, please enable JavaScript in your browser before proceeding. That's a 40 per cent increase in power from a simple head and cam swap, and one seriously happy Mustang owner! 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. 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. that is a healthy budget deal. And remember ENGINES have been being built/rebuilt/modified for years. AFR 165cc 58cc Heads. Holley 670 street avenger carb. 97% Positive Feedback . 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. 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 . thats after 3 hours of idling/midrange hits to tune the idle and part throttle . fuel injection system . Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. 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. He has worked as a tractor-trailer driver and mechanic, a rigger at a fire engine factory and as a race-car driver and builder. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. I'd much rather be able to drive it at 8 or 9/10s of what it can handle. Their weak point is that the rotator used on the exhaust valve is very thick. Gt40p heads - FourEyedPride.com You can email the site owner to let them know you were blocked. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members). Then why did you port the heads and how do you know if you made an improvement. FULL DYNO RESULTS. For additional insurance, we also added a set of ARP head studs, which are stronger and offer better thread overlap than factory bolts, which helps prevent pulling threads out of a used block. 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. Gt40/gt40p Heads On A 351w Questions - StangNet Stock Ford 351W 4bbl dyno numbers - Don Terrill's Speed-Talk If you dont feel comfortable doing this higher a pro. Boy, were we surprised with the results. Install a set of 1.7:1 roller-tipped rocker arms on the heads. You can use the stock roller lifters with any size cam you want. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. Never not once have I ever seen a SBF rod bolt create a failure. You can have your current 28 oz rebalanced to 50. Limited header choice is certainly a challenge. I just read about this build on the corral.net. With nitrous, this is easily a mid-11-second ride. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. . Not sure how they would mate up to your existing exhuast, but otherwise they should work. anyone have experience with GT40P heads on a 92 351W 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. 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. For the most part 302 heads and 351W heads are the same. Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. Check my post above. This 1979-1995 Mustang cylinder head and camshaft guide will overview the heads and cams we offer and how they will coincide. Well assume it is a 5.0L with stock heads. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. The GT40 & GT40P heads had a few differences that are note-worthy, the most importantly being the bump in compression. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. They suffered from poor aftermarket support up until about 15 years ago when it really came on strong. Im a different animal. Instructions on porting the GT-40p heads here. GT40P Heads how much hp from them. - StangNet The GT40P heads flow a lot better than stock 351 heads. You'll also have to use your 289 timing chain cover since it has a hole for the oil dip stick and fuel pump. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. Anythoughts? The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. I added a link to it. Calculated compression to 9.8:1. Mustang Cylinder Head & Camshaft Guide (79-95) - LMR 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. With. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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. Over $2050 for the 165/185 renegades. The Fora platform includes forum software by XenForo. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? He'll have to get a gear for his distributor. We also added an Edelbrock Performer RPM dual-plane intake and a set of 158-inch headers with no mufflers. The fix: basic power upgrades for a sluggish 302 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. 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. Weiand 7515 xcellerator intake. Max hp out of gt 40 heads | Mustang Evolution Forum people can stop saying that adding aftermarket cam with stock heads is a waste of time. Yep my **** is coming apart again Isnt life great! The only one that's close, is #7. I am working on a set of iron GT40s hoping it goes faster. Over $2050 for the 165/185 renegades. 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! 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. Mac and Ford Motorsport both make a GT40P spacific header. The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. They work, but present their own challenges. An aggressive cam will wake it up a bit. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. I spin it to 6500 and thats about it. 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. *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. We did a quick search for hydraulic roller cams and landed on a COMP camshaft that looked promising. Speedmaster PCE281.2046 Small Block Ford Aluminum Cylinder Heads 62cc Even with a stock Mustang 5.0 cam makes good power. 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. However I think the opportunity window is slowly closing. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. In less than an hour, we were ready to test. For all of us interested in Gt40p heads. check out the. You just want to keep it out of detonation. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. Mild Build Gt40p 331/347 stroker w/gt40p's, waste?Hp?cost involved? - Maverick Its funny no one mentioned anything about ignition timing or components, Your email address will not be published. The gt40p head is considered the best OEM 302 head made. GT-40 heads HP increase | Mustang Forums at StangNet 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. 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. #3::: Do your homework,get quality parts,dont skimp. are you twisted331 also? 1986 Short block with notched pistons. 1983 Mustang G.T. Choose a cylinder head before you install the pistons. We compare the GT40s to modern cylinder heads as well as other heads from the era. We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. Scorpion 1.6 roller rockers. GT-40P Heads - 5.0 Mustang & Super Fords Magazine - MotorTrend JEGS High Performance. In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . For the first test, we were reusing the stock Explorer cam, so the engine didn't need any break-in time. There's not a lot of reson to use 351 heads later than '75 since they essentially identical to 302 heads except for head bolt holes. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. This is just a quick overview of the changes that need to be done. 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. Ask Away! with Jeff Smith: Camshaft and Cylinder Head Recommendations I'll prob take a trip up there this weekend after scavenging the junkyards, thanks a million. You could run a thinner head gasket as well. I have been working on Fords for 40 years and I have experimented with a few tricks of my own. I have a 302 Windsor V8 EFI engine that I converted to a 600 cfm carburetor with a Street Warrior intake manifold. 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. LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? If you know him, ask him. Posted on May 07, 2014 by promarengine. this is the price for one head. This website is using a security service to protect itself from online attacks. Joined: Sun Mar 15, 2009 9:31 am. Calculating pushrod length I guess I had it backwards, sorry about that, didn't mean to spread misinformation. Dyno results GT40P heads | Vintage Mustang Forums 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. Be careful, I was once bitten by one of those reptile engine builders. 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. Ford Explorer Mountaineer 5.0 Ohv Iron 302 Sbf Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. I'll save the effort and lighten my front end by 50# with aluminum. 99 Explorer engine (302) with GT40P heads - Ford Muscle Cars Tech Forum 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 . Took me 7 hours to do one head.but they cleaned up real nice. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! Can I run the new cam with the same roller hydraulic lifters or do I have to change the lifters too? 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. You'll have to plug the oil hole that is in the engine from the old oil dipstick. Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. 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. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 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. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. Ha! (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. 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). Best of all, no machining is required to install these on your stock cast iron heads! For 2018, the Coyote makes 460 hp. 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. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. E303 Cam advanced 4 degrees. this head fits years 95-01 explorer mountaineer mercury mountaineer . I'm using the Trick Flow stage 1 cam with 1.7 roller rockers. Hey all, I'm working on building a 302 with my gt40p heads. GT40p heads peak horsepower was [email protected] with 363ft/[email protected] The worked 351 heads showed peak . I've not seen a set of longtubes that have an issue with GT40P's, either. This will keep you from dropping your overall static compression ratio and losing power. 351W with GT40P heads? | Mercury Cougar Owners Can anyone give me a little feedback about a '99 Explorer 5.0, and tell me if it's my answer. Yes- thank you. 1.7 shaft rockers and beehives. just curious. 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. For real performance, stock E7TE heads leave a lot to be desired. Thank You. Long tube headers are a terrific idea, but you need to open up the exhaust side. . Well also assume that this engine is running stock exhaust manifolds. 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. How much HP and torque do you think I. Your IP: On slicks the car went some low 7.70s right at 90mph. Mar 23, 2004. 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. For a better experience, please enable JavaScript in your browser before proceeding. You need to check. Maybe I'll think about a cam swap? Ported Hurricane Single Plane and custom 750 HP. 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. SB Ford GT40 Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. (its not their engine) 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. The newer camshaft is designed for use with a soft bronze distributor gear, not the hardened steel gear used for older camshafts. 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. GT40P heads, what kind of performance do they give? - FourEyedPride.com The GT40P cylinder heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. FORD, SMALL BLOCK 302 HO w/ E7, GT40P & GT40 - Alex's Parts Shop by category. The action you just performed triggered the security solution. Ford's seminal 302 engine (later re-dubbed the 5.0) has been popular with budget-minded hot rodders for decades. Through Central Coast you can have the heads fully prepped for your combination. 302HO with gt40p heads | Mustang Forums at StangNet Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. $700.98. Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. Because its all been done time after time after. With no other changes we gained 25 hp using factory iron heads. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. There are literally a dozen or so camshaft companies that offer a mild hydraulic roller cam for a 5.0L Ford. I have a 5.0 from a 1992 Mustang in my 65. 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. This is what I recommend to everyone who is doing a budget 5.0 build. As with all head installations, check piston-to-valve clearance before final startup. Someone does make the Tri-Y's headers for the early Mustangs using the "P" heads. Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. We know what you're thinking--only two-tenths from an extra 45 hp?
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