Worst AFR 165 dyno ever | Factory Five Racing Forum I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. The only way to really make more power is to go with a stroker kit, blower and/or heads. 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. Different years can have different combustion chamber sizes but ffor the most part there will be no performance increases by going with 302 heads. Plus you will need to drill all the head bolt holes out as the 351W uses larger head bolts. Sponsored. Step 2. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. I wouldnt recommend reusing lifters though. If the head bolt holes are 1/2" or slightly larger, ARP makes the washers and can be sourced from Ford Racing or ARP through a speed shop or Summit, Jegs and PAW among others. Depends on the budget. FORD GT40p 4 BAR HEADS IN GOOD CONDITION w/ONE BOLT BROKEN $700.98. I have to agree, the GT40P heads flow better than the GT40 iron heads. Just make sure it is a roller cam. An aggressive cam will wake it up a bit. Rowe studied engineering, philosophy and American literature at Central Florida Community College. Gt40 heads/intake from a jy explorer, leave the . LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? You'll also have to use your 289 timing chain cover since it has a hole for the oil dip stick and fuel pump. Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. That's a good combo in my book. First, adding headers will improve power on the existing combination. how hard to put on? Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? 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. 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 only one that's close, is #7. There is a better way. The gt40p head is considered the best OEM 302 head made. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. You just want to keep it out of detonation. I'm also have the regular GT40 heads on my current build. Every thing he tells you on this site is true. The Fora platform includes forum software by XenForo. I have a very good running stock 1981 302 in a F100 short box. Choose a cylinder head before you install the pistons. 289 or 351 heads on a 302 advantage? | The H.A.M.B. 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. The GT40P heads flow a lot better than stock 351 heads. How to Get More Horsepower Out of a Ford 289 | It Still Runs The MPH was there to run a little better but the local track is about terrible. It turned out we were conservative on both counts. Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. PTP Engineering front suspension and 25540R17s all around. 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. If you dont feel comfortable doing this higher a pro. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Most all long tubes come out far enough to clear and other short tube headers will work but there is clearance issues on two of the cylinders. Dec 8, 2011. 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. I have a 432 HP non Hi Po 289 I built. Ported Hurricane Single Plane and custom 750 HP. These heads have been remanufactured using refaced reclaimed Factory Valves. Now we know why Dennis Hilliard of Central Coast Mustang is so high on these heads. For a better experience, please enable JavaScript in your browser before proceeding. 302 GT40 Dyno Results - FourEyedPride.com We've already been motivated to put this engine in a buddy's Mustang. Small Block Ford 289/302/5.0L/351w 180cc/60cc Aluminum Cylinder Head E42004. What you are trying to do is to increase the amount of airflow through the engine in order to make more power. Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. HiPo manifolds and Ill be good. Headers and a camshaft will help but the engine really needs aftermarket 3/8 inch connecting rod bolts and aftermarket cylinder heads. Shop by category. will gt40p heads fit on a 302 | Ford Mustang Forum SB Ford GT40 Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. No-option stripper- I like strippers. 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. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. When building an engine there is a lot to take into consideration. 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. If they are cheap enough, take them anyway. Yeah, out of a bolt on upgrade, you'd probably be looking at 260-280rwhp ish with supporting mods. K.S. 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. Keep in mind that swapping camshafts is a fairly extensive effort. (Please note these are not GT40P Explorer heads). You'll have to plug the oil hole that is in the engine from the old oil dipstick. They work, but present their own challenges. These are some of the pictures I have showing the Explorer manifolds. That's an improvement of 22 hp over Test 2. Building a 302-inch small-block to produce 400 hp is really no big deal, but doing. In less than an hour, we were ready to test. 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 the main reason why these engines are not modified as much as the small block Chevy. 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. 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 Took me 7 hours to do one head.but they cleaned up real nice. Is asking advice for a fairly common situation involving parts with mandatory compatibility between the two for performance and longevity. Your email address will not be published. They also have emissions legal heads as well. 1996-2001 Ford Explorer 5.0L V8 Specifications Definitely going to use my P heads. 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. Really hurt too. This will cost additional money but is still worth it, in our opinion. Compare. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. Again, assuming this is a nearly stock 5.0L with stock heads, the Weiand Street Warrior dual plane intake and 600 cfm carburetor, its important to not become overly aggressive and choose a big camshaft. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. people can stop saying that adding aftermarket cam with stock heads is a waste of time. Overview. This engine will be good for your 65 Mustang. I'll save the effort and lighten my front end by 50# with aluminum. These cast piston short-blocks are not quite as good as the forged piston 5.0L that came in Fox-body Mustangs, but the GT40P heads flow much better than earlier 5.0L heads. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. I recall having an absolute blast with my old K-code coupe back in the day. We also added an Edelbrock Performer RPM dual-plane intake and a set of 158-inch headers with no mufflers. GT40P heads, 302 and Victor Jr. intake: - Factory Five Racing Forum I'll prob take a trip up there this weekend after scavenging the junkyards, thanks a million. Free shipping. 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. Both swaps made more sense when parts were readily available at the bone yard for cheap. Not to mention, they will run circles around GT40P's out of the box. I can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. 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 reason this new generation of Ford engines make a ton more power is they also enjoy fantastic cylinder heads and four valves per cylinder. T5z and 3.89 9" TL rear. I just read about this build on the corral.net. The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. For all of us interested in Gt40p heads. the springs are new stock oem ford. 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. If you wanted to make your engine feel strong, these would be a decent investment, but they will require some modifications. Pride is built, in your garage, with your two hands. Mar 23, 2004. Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. Slover primarily focused on the exhaust side of the GT40P heads. I got rid of the carburetor and went with a F.A.S.T. Performance & security by Cloudflare. (Image/Harrison Creamery). 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. 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. Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. 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. I spin it to 6500 and thats about it. We will go into more detail on the head mods in a later story in Junkyard Builder, so watch for it. Buy the lifters for peace of mind now and hopefully for the duration. Click to reveal With the GT-40P heads you will need to back off the timing a couple degrees and bump up the fuel pressure. We heated the bottle to 950 psi and hit the button at 4,500 rpm. (its not their engine) $169.50. 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. 331/347 stroker w/gt40p's, waste?Hp?cost involved? - Maverick They almost seem like flywheel numbers rather than RWHP numbers. check out the. If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. made more power everytwhere and 40 hp is respectable. Where they differ is the combustion chamber size. that is a healthy budget deal. This will keep you from dropping your overall static compression ratio and losing power. this head is complete with new 1.837 int valves and 1.536 exhaust valves. Junkyard Gt40p Heads-add 30+ Hp to Your 5.0l (For Free?) You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. 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. i'd love to use these heads,. JavaScript is disabled. 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. Upgrading Fox Body Cylinder Heads - AmericanMuscle.com If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. I would like to know what heads, cam and intake manifold combination to use for the most HP I can squeeze out of that motor. I'd get the gt40 setup, and put an s trim on it. 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. 1.7 shaft rockers and beehives. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS | What's New 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. Nice to see actual dyno results instead of "butt dyno" guesses. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. . #3::: Do your homework,get quality parts,dont skimp. Ha! Yea. Through Central Coast you can have the heads fully prepped for your combination. I have a 302 Windsor V8 EFI engine that I converted to a 600 cfm carburetor with a Street Warrior intake manifold. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. JavaScript is disabled. GT40 Heads On A 289? | Ford Muscle Cars Tech Forum 302HO with gt40p heads | Mustang Forums at StangNet SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. Stock valve sizes? The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. . Runs well. Because of this, your tuneup will probably need to be modified. Here is the lowdown on exhaust manifolds and VALVE SPRINGS. 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. 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. Its funny no one mentioned anything about ignition timing or components, Your email address will not be published. Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. Save narve00 The later model distributors had a different diameter shaft than the earlier ones. Motor is going into a Ranger. Obviously, tuneups will vary. Also, the spark plug angle makes it a pain. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. I turned it because it was tired when I got it. Pretty sure that was name, but I could be wrong. We've seen what happens from previous Ford experience when power levels above 500 hp tend to either pop head gaskets or saw blocks in half. Ask Away! with Jeff Smith: Camshaft and Cylinder Head Recommendations 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. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. For the most part 302 heads and 351W heads are the same. K.S. 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. Anythoughts? 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. *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. Here is my setup. Manual trans. With no other changes we gained 25 hp using factory iron heads. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. You didnt mention the car this engine is in, but lets assume there is enough room to remove the radiator and any other coolers and perhaps some or all of the front grille and/or brackets before the cam has sufficient room to exit the front of the engine. 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. This is not a criticism but instead consider it to be more of a heads-up. Take the assembly to a machine shop to have it balanced and install it in the block. There was an article in Hot Rod magazine in the mid '80's where Jon Kaase was developing 351w packages. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 SBF OEM | eBay Motors, Parts & Accessories, Car & Truck Parts & Accessories | eBay! They fill that spot between power and budget. Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. Yes Mr.Smith, your column here at OAC adorned with extreme performance without power adders, or all Engine as its known, from a superior pushrod Small Block featuring almost all USA sourced modern components with the familiar smell of Ford Blue. 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. 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. 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. many thanks to all you eco-hippies giving me dirty looks and helping me feel llike an overall badass rebel. 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. at the crank. Add 40 to 70 HP to your 302 yourself - Factory Five Racing Forum Gasoline/Diesel all makes on earth & still doing it today with great pride.Feel free to contact me anytime. Install a set of 1.7:1 roller-tipped rocker arms on the heads. For the first test, we were reusing the stock Explorer cam, so the engine didn't need any break-in time. Here a comparison of different heads on a 302: I'm very happy with my GT40P. For both the GT40 and GT40p heads, I STRONGLY suggest upgrading the valve springs. 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. Enter your search keyword. However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. FORD, SMALL BLOCK 302 HO w/ E7, GT40P & GT40 - Alex's Parts I was looking at putting on the GT40P heads on. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. All Ford Mustangs | Model Specific Forums, GT-40P Heads - 5.0 Mustang & Super Fords Magazine. A COMP hydraulic roller cam we found works well with this combination. For real performance, stock E7TE heads leave a lot to be desired. bmcdaniel, Feb 17, 2004 #7. v8maverick Member. this head fits years 95-01 explorer mountaineer mercury mountaineer . These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. 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. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. GT40 vs GT40P: Who has Smaller Chamber Volume ! More compression Install a set of 1.7:1 roller-tipped rocker arms on the heads. 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). Don't let the fact that the iron GT40 heads have a larger exhaust valve fool you. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. Check my post above. After we installed the heads and with the fan off, he ran a 12.46 at 107.9. JUNKYARD GT40P HEADS-ADD 30+ HP TO YOUR 5.0L (FOR FREE?) I got lucky and found a complete Explorer GT40P engine online. 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! We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. 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. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. We are offering a pair of original Ford Cobra 5.0 GT40 cast iron cylinder heads. . These timeslips are from 1280' above sea level. A forum community dedicated to Ford performance owners and enthusiasts. 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. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. However there are plenty of factory heads that with the help of an experienced machine shop can be great. You can use the stock roller lifters with any size cam you want. Scorpion 1.6 roller rockers. I got a GT40P off the assembly line years ago. GT-40 heads HP increase | Mustang Forums at StangNet Central Coast Mustang sells GT-40P heads at a great price, making them a viable alternative in a market flooded with performance head choices. Can anyone give me a little feedback about a '99 Explorer 5.0, and tell me if it's my answer. #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. I'm sure the dyno operator used some goofball correction factor to make the numbers look higher. 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. Learn how your comment data is processed. 02-11-2012, 07:16 PM #6 fiveoh 86lx Ive bought wrecking yard SBFs and put 20 lbs of boost to them and spin them to 7000 and made 500 HP with several of them. The best thing to do would be to use a specific break-in oil for the first 200 to 300 miles of use to reduce the change of a potential problem with undue wear. I added a link to it. Hey all, I'm working on building a 302 with my gt40p heads. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. Calculated compression to 9.8:1. I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. Its NA but makes use of AFR heads and some other aftermarket goodies. .. i would not buy valves unless you need them amd would not switch to studs with these heads for your low hp . I have been working on Fords for 40 years and I have experimented with a few tricks of my own. Small-block Fords and Mopars only use four head bolts per cylinder, so retaining proper head-gasket sealespecially with nitrousis a point that demands attention, so we ordered a set of Fel-Pro MLS head gaskets rather than a standard, composition gasket. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! I have managed to get 402 horse power from a 289 hipo natural aspirated. 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. I don't need tons of power to enjoy the car. We turned to Rare Auto Design in Orlando for dyno tests to find out how much horsepower we gained. What would be the best cam and springs to use for these heads in a 302 Windsor? We gained 45 hp and 40 lb-ft of torque. The kit offers adjustable power from 50 to 250 hp with a simple jet change. As noted, this is looking like hes building a 351 Lightning truck motor, which is a good way to go. THANKS VERY MUCH! Not *as* good as the GT40p heads, but I'd prefer to not have to worry about exhaust fitment issues, or have a narrow range of what I can work with. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. Works on all factory cast iron E7, GT40, and GT40P cylinder heads! Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. Budget 300HP 302 Build There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. JEGS High Performance. check out the. Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow.
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