You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. 99 Explorer engine (302) with GT40P heads - Ford Muscle Cars Tech Forum Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? Ford Factory 5.0 Performance Cylinder Heads. What did the heads flow? They fill that spot between power and budget. Be careful, I was once bitten by one of those reptile engine builders. '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 Do not ever, ever think about using the tube type manifolds. These are some of the pictures I have showing the Explorer manifolds. In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . 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. Holley 670 street avenger carb. A forum community dedicated to Ford Mustang owners and enthusiasts. In less than an hour, we were ready to test. A forum community dedicated to Ford performance owners and enthusiasts. 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. $930.00 + $55.00 shipping. . 1979 Indy 500 Pace Car. We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. I have a very good running stock 1981 302 in a F100 short box. We need a build on a 400+ hp 302/6 build. We decided on a Powerstar kit from Nitrous Supply, owned by our good friend Mike Thermos, who was one of the original nitrous kit suppliers back in the early '80s. With no other changes we gained 25 hp using factory iron heads. 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? After graduating from Iowa State University with a journalism degree in 1978, he combined his two passions: cars and writing. The asterisk HP differences are calculated using Test 1's 294-hp peak. Keywords 68stang351 Founding Member May 16, 2002 850 Max hp out of gt 40 heads | Mustang Evolution Forum Pretty sure that was name, but I could be wrong. 1996-2001 Ford Explorer 5.0L V8 Specifications Richard Rowe has been writing professionally since 2007, specializing in automotive topics. That's a 40 per cent increase in power from a simple head and cam swap, and one seriously happy Mustang owner! If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. They almost seem like flywheel numbers rather than RWHP numbers. The only one that's close, is #7. For the first test, we were reusing the stock Explorer cam, so the engine didn't need any break-in time. will gt40p heads fit on a 302 | Ford Mustang Forum 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. The Fora platform includes forum software by XenForo. GT40P heads, 302 and Victor Jr. intake: - Factory Five Racing Forum Gt40/gt40p Heads On A 351w Questions - StangNet I'll save the effort and lighten my front end by 50# with aluminum. They were located in Tahachapi CA, and were sold with upgraded springs for $650.00, back in 2002-2003 ish. many thanks to all you eco-hippies giving me dirty looks and helping me feel llike an overall badass rebel. Ford Explorer Mountaineer 5.0 Ohv Iron 302 Sbf For a better experience, please enable JavaScript in your browser before proceeding. 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. 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. The GT40P heads flow a lot better than stock 351 heads. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. 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. 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). (Please note these are not GT40P Explorer heads). SBF engines are modified constantly. That's fantastic for the minimal investment we made. That's a good combo in my book. 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. Mac and Ford Motorsport both make a GT40P spacific header. That's more than enough to feed a power-brake booster. Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. $169.50. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. Learn how your comment data is processed. The Fora platform includes forum software by XenForo. I've not seen a set of longtubes that have an issue with GT40P's, either. timing and compression ratio with gt40p heads - Modded Mustang Forums Rowe studied engineering, philosophy and American literature at Central Florida Community College. They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Took me 7 hours to do one head.but they cleaned up real nice. They also have emissions legal heads as well. Yeah, out of a bolt on upgrade, you'd probably be looking at 260-280rwhp ish with supporting mods. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. You just want to keep it out of detonation. If this is beyond your technical ability, you could ask a local machine shop to perform the modifications. A good port job can set you back another $500-$1,000. The MPH was there to run a little better but the local track is about terrible. I can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. If you dont feel comfortable doing this higher a pro. 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. 1983 Mustang G.T. The HP DIFF column on the far right lists the horsepower difference between Test 1 and Test 3. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! We also added an Edelbrock Performer RPM dual-plane intake and a set of 158-inch headers with no mufflers. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. As usual, there is much more to this story. I'm wondering how these heads will interact with the paxton 1220 sl supercharger I'm trying to put on. The heads that were used were also old C8 casting with 58cc chambers. Ask Away! with Jeff Smith: Camshaft and Cylinder Head Recommendations Ive been building ENGINES for 40+ years. Anythoughts? Even with a stock Mustang 5.0 cam makes good power. Depends on the budget. 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. Would have liked to see a comparison done on the same short block using a set of decently-ported early non-Thermactor iron heads Tracy Blackford, 65 Mustang FB, 331 built with 289 H beam rods and 383W piston, 282S cam, self ported '70 351w heads, Dougs Tri-Y headers. 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. If I get different urges later, Ill pursue those then. Enter your search keyword. This is an older thread, you may not receive a response, and could be reviving an old thread. Car Craft mag. Not looking for crazy HP. how much HP and torque? There is a better way. With nitrous, this is easily a mid-11-second ride. LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? I turned it because it was tired when I got it. It turned out we were conservative on both counts. If you're running a stock cam, 1.7 rockers will work perfectly. 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. Never not once have I ever seen a SBF rod bolt create a failure. 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. Beyond the engine's amazingly good appearance, Moore had a couple of good reasons for choosing this engine. JUNKYARD GT40P HEADS-ADD 30+ HP TO YOUR 5.0L (FOR FREE?) 02-11-2012, 07:16 PM #6 fiveoh 86lx 302HO with gt40p heads | Mustang Forums at StangNet I got rid of the carburetor and went with a F.A.S.T. 97% Positive Feedback . Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. FORD GT40p 4 BAR HEADS IN GOOD CONDITION . 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. This is a common mistake with first-time cam buyers who dont necessarily appreciate that the cam is just one component of the overall engine package. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. The longer duration created a slight loss of torque below 3,300 rpm compared to both previous cams, but beyond that mild loss of power, the bigger Voodo out-powered its smaller cousin, cranking out a peak torque of 355 lb-ft at 4,300 (a gain of 7 lb-ft over Test 2) and charging to a peak horsepower of 376 at 6,000 rpm. bmcdaniel, Feb 17, 2004 #7. v8maverick Member. When compared to the new generation of performance engines on the market today like the 5.0L DOHC Coyote engine, your engine will not come close. After a couple grand you have a killer set of heads, but there's got to be a less-expensive way of making horsepower. As with all head installations, check piston-to-valve clearance before final startup. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. 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. There are a couple of reasons for this suggestion. Im now thinking of adding a cam to match the carb. 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. Dec 8, 2011. Small Block Ford 289/302/5.0L/351w 180cc/60cc Aluminum Cylinder Head E42004. And have discovered something that I dont think anyone else knows. What Cam and Springs to Use for GT40 Heads how hard to put on? Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. $700.98. Not sure how they would mate up to your existing exhuast, but otherwise they should work. A mild porting with gasket matching will be very good. Thanks. Assorted screwdrivers, pliers and vise-grips. GT40P heads? how hard to put on? how much HP and torque? 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. That's an improvement of 22 hp over Test 2. For the most part 302 heads and 351W heads are the same. Related Resources Mustang Generation Nicknames: What Do They Mean? The spark plug issue is almost a non-issue. Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. Now we know why Dennis Hilliard of Central Coast Mustang is so high on these heads. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. just curious. I have a 432 HP non Hi Po 289 I built. Choosing pistons to complement GT40P heads - MustangWorks.com Along with the heads, we used MAC headers for GT-40P heads. These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. Mild Build Gt40p 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. 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. 302 heads on 351w | ClassicBroncos.com Forum You need to check. 1.7 shaft rockers and beehives. +1 I would go with the regular GT40 heads. The engine was only rated at 215 hp, but it at least had 9.0:1 compression. I am very happy too. Test 1: 750-cfm carburetor, dual-plane intake manifold, and stock camshaft. Shop by category. 1 - 7 of 7 Posts. Different years can have different combustion chamber sizes but ffor the most part there will be no performance increases by going with 302 heads. I am sure you have increased the bore size and possibly even the stroke a bit and spin it up pretty high in the RPM range. Commonly referred to as Explorer heads, GT-40P iron castings are found on current 5.0-equipped Explorers. Build Thread 1965 Fastback Project "Racesteed". Nudge us with emails, and we'll make it happen. Works on all factory cast iron E7, GT40, and GT40P cylinder heads! Weiand 7515 xcellerator intake. Take the assembly to a machine shop to have it balanced and install it in the block. 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. Step 1. I got a set of AFR heads , night and day. E303 Cam advanced 4 degrees. 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 302 GT40 Dyno Results - FourEyedPride.com by travis Sun May 03, 2020 8:33 am. 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. Shop by category. At the dragstrip, we gained two-tenths and 2 mph. You can use the stock roller lifters with any size cam you want. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. Slover primarily focused on the exhaust side of the GT40P heads. Torque on the other hand isnt something to write home about. Headers and a camshaft will help but the engine really needs aftermarket 3/8 inch connecting rod bolts and aftermarket cylinder heads. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. 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. 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. 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. LOW-BUCK 302 FORD HEAD UPGRADE - YouTube Obviously, tuneups will vary. The later model distributors had a different diameter shaft than the earlier ones. Pride is built, in your garage, with your two hands. All costing in the end at least another $2k. There are too many variables to add to this regarding aftermarket stroker kits or components. This is what I recommend to everyone who is doing a budget 5.0 build. 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. The Fora platform includes forum software by XenForo. Free shipping. Your email address will not be published. I just read about this build on the corral.net. 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. Junkyard Gt40p Heads-add 30+ Hp to Your 5.0l (For Free?) Depending on the Headers you have you might be okay.