302 with gt40p heads horsepower
If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. 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. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. Early Windsors tend to have fairly restrictive exhaust manifolds, making the addition of a set of headers that much more efficient. Very true about finding them at the local yards. at the crank. I turned it because it was tired when I got it. 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). The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. 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. Enter your search keyword. With the P-heads requiring pedestal-mount rockers, we also called up Crane Cams for a set of 1.6 pedestal-mount roller rockers. Every thing he tells you on this site is true. Thanks. 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. In less than an hour, we were ready to test. An aggressive cam will wake it up a bit. I'm sure the dyno operator used some goofball correction factor to make the numbers look higher. Because of this, your tuneup will probably need to be modified. 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. 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. There are caveats to this plan, however. Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. Do you guys have part numbers for the spring kits? For a better experience, please enable JavaScript in your browser before proceeding. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. I guess I had it backwards, sorry about that, didn't mean to spread misinformation. 68 XR7 & 68 M-100. (Image/Harrison Creamery). Buy the lifters for peace of mind now and hopefully for the duration. I've not seen a set of longtubes that have an issue with GT40P's, either. made more power everytwhere and 40 hp is respectable. You can use the stock roller lifters with any size cam you want. 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. Test 1: 750-cfm carburetor, dual-plane intake manifold, and stock camshaft. $139.99. Just make sure it is a roller cam. Be careful, I was once bitten by one of those reptile engine builders. United Engine and Machine sells cheap but decent pistons that will do what you're wanting. 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. These engines came with the GT40P head, which even with its small valves, offers really good performance. Im now thinking of adding a cam to match the carb. Let us explain. This engine will be good for your 65 Mustang. 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. 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. Headers and a camshaft will help but the engine really needs aftermarket 3/8 inch connecting rod bolts and aftermarket cylinder 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 Well that article just got me very ancy, I want these heads!! Smith began writing for Car Craft magazine in 1979 and became editor in 1984. Gt40 heads/intake from a jy explorer, leave the . 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. Step 2. The spark plug issue is almost a non-issue. 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. 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. Stock valve sizes? Yeah, except those. a) ain't early and b) aren't 289 heads. The heads that were used were also old C8 casting with 58cc chambers. For all of us interested in Gt40p heads. This website is using a security service to protect itself from online attacks. I need that part number too! Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. Similar to regular GT-40 heads, the biggest difference between the two is that the P-heads feature a revised spark plug angle which extends the plug into the combustion chamber, putting the flame front close to the absolute center of the chamber, resulting in a smoother combustion process. The MPH was there to run a little better but the local track is about terrible. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. thats after 3 hours of idling/midrange hits to tune the idle and part throttle . 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. For a better experience, please enable JavaScript in your browser before proceeding. Really hurt too. 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. BONUS TEST-FOUR DIFFERENT 302 INTAKES.. If you know him, ask him. Both swaps made more sense when parts were readily available at the bone yard for cheap. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. Not to mention, they will run circles around GT40P's out of the box. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. 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. Your IP: The GT40 heads are a bit more versatile, working with the 5.4 and 6.8, while the GT40P (Explorer/Mountaineer) heads will only work on the 6.8 due to an interference issue. As with all head installations, check piston-to-valve clearance before final startup. The reply has so many assumptions that I cant even assume to know the answer. The tube headers showed a gain of almost 100 hp! Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! '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 With nitrous, this is easily a mid-11-second ride. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. are you twisted331 also? Keywords 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. Stock 1989 5.0L HO pistons will work if you can find them. 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. that is a healthy budget deal. Choose a cylinder head before you install the pistons. Obviously, tuneups will vary. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. the engine is carburated of that makes a difference. 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. Well also assume that this engine is running stock exhaust manifolds. E303 Cam advanced 4 degrees. Just put some 1.7 pedistal rocker arm on along with a mild camshaft (make sure to use the correct valve springs), you will make over 300 flywheel hp. 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. Through Central Coast you can have the heads fully prepped for your combination. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. 1983 Mustang G.T. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. You gave me the info I was looking for, and I really do appreciate it. .. i would not buy valves unless you need them amd would not switch to studs with these heads for your low hp . For the most part 302 heads and 351W heads are the same. 1979 Indy 500 Pace Car. 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. . After a couple grand you have a killer set of heads, but there's got to be a less-expensive way of making horsepower. GT40, GT40P, would be great factory heads. For real performance, stock E7TE heads leave a lot to be desired. Their weak point is that the rotator used on the exhaust valve is very thick. Rowe studied engineering, philosophy and American literature at Central Florida Community College. Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. Compare. Took me 7 hours to do one head.but they cleaned up real nice. I have been working on Fords for 40 years and I have experimented with a few tricks of my own. $930.00 + $55.00 shipping. Scorpion 1.6 roller rockers. 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. Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. Install a set of 1.7:1 roller-tipped rocker arms on the 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. All Ford Mustangs | Model Specific Forums, GT-40P Heads - 5.0 Mustang & Super Fords Magazine. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members). 97% Positive Feedback . There are too many variables to add to this regarding aftermarket stroker kits or components. I went to a couple in Tucson and almost all the Ford vehicles that came with a 5.0 had the heads missing. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. Our recommendation would be, rather than change the camshaft, you might want to look into adding a set of long-tube headers and a dual exhaust if the engine is not already so equipped. GT40p heads peak horsepower was [email protected] with 363ft/[email protected] The worked 351 heads showed peak . 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. I just read about this build on the corral.net. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! No-option stripper- I like strippers. If you have a early 351W ie pre 76 it probably . many thanks to all you eco-hippies giving me dirty looks and helping me feel llike an overall badass rebel. Good on ya Jeff Smith. The GT40P heads flow a lot better than stock 351 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:?:!?!?!? 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. We turned to Rare Auto Design in Orlando for dyno tests to find out how much horsepower we gained. GT40P heads, what kind of performance do they give? The GT40 & GT40P heads had a few differences that are note-worthy, the most importantly being the bump in compression. check out the. This is what I recommend to everyone who is doing a budget 5.0 build. Limited header choice is certainly a challenge. The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. 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 . Weiand 7515 xcellerator intake. 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. For a better experience, please enable JavaScript in your browser before proceeding. A LOT of them do it these days. A trip to Orlando Speed World provided us with updated quarter-mile times. Overview. Well assume it is a 5.0L with stock heads. Central Coast Mustang sells GT-40P heads at a great price, making them a viable alternative in a market flooded with performance head choices. Sponsored. A forum community dedicated to Ford Mustang owners and enthusiasts. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. I'd get the gt40 setup, and put an s trim on it. I wouldnt recommend reusing lifters though. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . What would be the best cam and springs to use for these heads in a 302 Windsor? In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . There was an article in Hot Rod magazine in the mid '80's where Jon Kaase was developing 351w packages. The car weighs #2835 with driver. At the dragstrip, we gained two-tenths and 2 mph. Have fun, be safe, enjoy. Shop by category. Sponsored. 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. JUNKYARD GT40P HEADS-ADD 30+ HP TO YOUR 5.0L (FOR FREE?) The valve seats have been cut on a . 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. Related Resources Mustang Generation Nicknames: What Do They Mean? And have discovered something that I dont think anyone else knows. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. Now he serves as a regular contributor to OnAllCylinders. Most of them are aware of what changes need to be completed. You just want to keep it out of detonation. Cloudflare Ray ID: 7a2e2d95dedea1e4 Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. SB Ford, GT40 .575" Lift Max Output II Drop in Valve Spring Kit, Hyd Roller, 140 Lb Seat. Pretty sure that was name, but I could be wrong. If you're running a stock cam, 1.7 rockers will work perfectly. HiPo manifolds and Ill be good. Manual trans. 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! With the GT-40P heads you will need to back off the timing a couple degrees and bump up the fuel pressure. These are a great head but do need some machining mods to make they really work well. In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. Using the manufacturer recommended springs for your camshaft are a safe bet. this is the price for one head. Keep in mind that swapping camshafts is a fairly extensive effort. 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. The GT40P cylinder heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. Here is my setup. Take the assembly to a machine shop to have it balanced and install it in the block. 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. Common sense would suggest that with the heavy lifting complete and the old cam removed, by not installing the new roller lifters along with the camshaft could be asking for the possibility of trouble just a few thousand miles down the road. And remember ENGINES have been being built/rebuilt/modified for years. Shop by category. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. Maybe I'll think about a cam swap? GT40Ps have 58cc. Also, the spark plug angle makes it a pain. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. While the heads were off getting a massage, we turned our attention to the cam timing. Boy, were we surprised with the results. Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. We are offering a pair of original Ford Cobra 5.0 GT40 cast iron cylinder heads. Runs well. A bone stock 2bbl early 351w with stock replacement forged pistons (9.0 compression) and dyno headers made 211 Hp . Without changing the stock pistons. 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. Just got through porting one of my gt40p heads today. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. Joined: Sun Mar 15, 2009 9:31 am. Motor is going into a Ranger. Joined . You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. No-option stripper- I like strippers. We've already been motivated to put this engine in a buddy's Mustang. Holten runs the factory fan, but he had removed it when he ran the 12.63. I'll save the effort and lighten my front end by 50# with aluminum. bmcdaniel, Feb 17, 2004 #7. v8maverick Member. Location: Re: Stock Ford 351W 4bbl dyno numbers. 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. He'll have to get a gear for his distributor. T5 with 3.73s. Tim's junkyard refugee survived the beating and we had a bitchin' story. the springs are new stock oem ford. 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. Everything fits, use the stock rockers and pushrods. 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. A good port job can set you back another $500-$1,000. I have a 66 mustang with its original untouched 289 with over 140 k on it that Ive been running a blow thru turbo making 14 lbs of boost on for the last 5 years and its never given me a problem. Purchase any used aftermarket manifold for the 302 that is designed to function in the 3,500 to 6,500 power band. Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1.7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. 02-11-2012, 07:16 PM #6 fiveoh 86lx However there are plenty of factory heads that with the help of an experienced machine shop can be great. 950.00 us a set and will ship . Car Craft mag. That's an improvement of 22 hp over Test 2. (Please note these are not GT40P Explorer heads). THANKS VERY MUCH! I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. That's a 40 per cent increase in power from a simple head and cam swap, and one seriously happy Mustang owner! These timeslips are from 1280' above sea level. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. The only one that's close, is #7. I got a GT40P off the assembly line years ago. #1:::Throw out all your Magazines that suggest what to do! It's a classic move we've pulled off many times. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. PTP Engineering front suspension and 25540R17s all around. I love my setup and it is very strong engine. The engine never huffed oil out of the breathers, and the spark plugs all looked excellent. These are some of the pictures I have showing the Explorer manifolds. Consider having the head's intake ports matched to the intake manifold gasket. 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. Find many great new & used options and get the best deals for FORD GT40p 4 BAR HEADS IN GOOD CONDITION w/ONE BOLT BROKEN at the best online prices at eBay! I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. 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. GT40s have 64cc chambers. For a better experience, please enable JavaScript in your browser before proceeding. Those are really good numbers. Compare. In review, we rescued a used 5.0L Ford from the boneyard, ported the heads, added a cam, carburetor, intake manifold, and headers, and pulled an amazing 376 hp out of the mix. I had a set of 69 302 heads I ran for a while . 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. GT 500; Posts: 8496; Location: Brisbane . There are a couple of reasons for this suggestion. You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. This will keep you from dropping your overall static compression ratio and losing power. Those heads were unported and had stock valve sizes! 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 have a 302 engine from a 1977 granada and i am wondering if gt40p heads from an explorer will fit on this motor. Theres many options available for a little more power. Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. . But don't think that adding a bigger camshaft will make more power. 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. This test went so well that we were eager to see what the slightly bigger cam would do. In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. SBF engines are modified constantly. Because its all been done time after time after. Free shipping. Skip to main content. Dec 8, 2011. We also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. Then why did you port the heads and how do you know if you made an improvement. JavaScript is disabled. 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. They also have emissions legal heads as well. The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. 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. ***Most important is theStupid question is the one that was never asked!*** 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. The Fora platform includes forum software by XenForo. The newer camshaft is designed for use with a soft bronze distributor gear, not the hardened steel gear used for older camshafts. First, adding headers will improve power on the existing combination. 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? 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. Because of this, your tuneup will probably need to be modified. 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.
Square Brush Medibang,
Articles OTHER
