302 with gt40p heads horsepowercity of dayton mn building permits
thats after 3 hours of idling/midrange hits to tune the idle and part throttle . Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. just curious. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. 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. It's an 86 roller 5.0 engine that had a recent rebuild sometime in the past with keith black pistons, otherwise stock. Ill do springs and a moderate cam and go for a good, dependable power plant. 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. ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. I added a link to it. Speedmaster PCE281.2046 Small Block Ford Aluminum Cylinder Heads 62cc 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. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. 351W D0OE-C heads better than GT40P\'s? - Ford Muscle Cars Tech Forum This time around, we chose a shining example of this junkyard art form. If you smooth out the bowls and exhaust ports and gasket match the intakes they should flow decent. All Ford Mustangs | Model Specific Forums, GT-40P Heads - 5.0 Mustang & Super Fords Magazine. Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. Ported Hurricane Single Plane and custom 750 HP. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. Let us explain. Fastest e303 5.0l's? - FourEyedPride.com Compare. Yes- thank you. All manufactured using advanced CNC technology for the extreme durability and precision required of the modern canted valve Ford Small Block at power levels around the 1000 mark reached during recent competitions at the EMC and at the strip. 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. You gave me the info I was looking for, and I really do appreciate it. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. Rowe studied engineering, philosophy and American literature at Central Florida Community College. 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. 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. Choosing pistons to complement GT40P heads - MustangWorks.com 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. will gt40p heads fit on a 302 | Ford Mustang Forum 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. Required fields are marked *. 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. Because of this, your tuneup will probably need to be modified. We compare the GT40s to modern cylinder heads as well as other heads from the era. Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. Get 500 Horsepower from a Junkyard Ford Explorer 302 - MotorTrend Features hardened 4140 Chromoly retainers, valve locks, spring shims, a spring height gauge, valve seals, and instructions. Add 40 to 70 HP to your 302 yourself - Factory Five Racing Forum 302 with GT40 heads | Ford Mustang Forums Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. Gasoline/Diesel all makes on earth & still doing it today with great pride.Feel free to contact me anytime. Not looking for crazy HP. Joined . I got a set of AFR heads , night and day. For both the GT40 and GT40p heads, I STRONGLY suggest upgrading the valve springs. Have fun, be safe, enjoy. $139.99. 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. Just make sure it is a roller cam. K.S. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. You can have your current 28 oz rebalanced to 50. Well offer one as an example. I'm also have the regular GT40 heads on my current build. Building a 302-inch small-block to produce 400 hp is really no big deal, but doing. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. The cost of a new set of standard replacement roller lifters is very affordable at major retailers like Summit. GT40 Heads On A 289? | Ford Muscle Cars Tech Forum 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. The GT40P heads flow a lot better than stock 351 heads. The fix: basic power upgrades for a sluggish 302 P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. 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. This is the main reason why these engines are not modified as much as the small block Chevy. Nudge us with emails, and we'll make it happen. They suffered from poor aftermarket support up until about 15 years ago when it really came on strong. SB Ford GT40P Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. Here is my setup. You didnt mention what camshaft you would be choosing or exactly which 5.0L Ford Windsor engine you are working with. This website is using a security service to protect itself from online attacks. For a better experience, please enable JavaScript in your browser before proceeding. 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. This engine will be good for your 65 Mustang. If this is beyond your technical ability, you could ask a local machine shop to perform the modifications. Nice to see actual dyno results instead of "butt dyno" guesses. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. 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. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. GT40P heads? how hard to put on? how much HP and torque? Like I said lots of options. However there are plenty of factory heads that with the help of an experienced machine shop can be great. The spark plug issue is almost a non-issue. That's a good combo in my book. This is an older thread, you may not receive a response, and could be reviving an old thread. Finding Gt40p heads at the junkyard is getting more and more complicated and if you want to upgrade the heads you have to take into account the costs of the machine shop and compare everything to a set of cheap aluminum heads. I bought a crate 302 from Downs Ford a few years ago that was producing 320 hp. #1:::Throw out all your Magazines that suggest what to do! Ive been building ENGINES for 40+ years. Its NA but makes use of AFR heads and some other aftermarket goodies. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. Once the headers are in place, then you can consider if you still want more power. We gained 45 hp and 40 lb-ft of torque. this head fits years 95-01 explorer mountaineer mercury mountaineer . Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . Some ideas never go out of style. Sponsored. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. any input is apprecciated:smartass: Thank you for the info, if all I have to worry about is the plugs then I'm in good shape hahaha. Different years can have different combustion chamber sizes but ffor the most part there will be no performance increases by going with 302 heads. While the heads were off getting a massage, we turned our attention to the cam timing. never messed with the timing, its at 35* total . 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. Dyno results GT40P heads | Vintage Mustang Forums Long tube headers are a terrific idea, but you need to open up the exhaust side. In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. . 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. The Edelbrock Performer RPM is a good choice, but Holley, Weiand and Ford Motorsport also have similar offerings. Those heads were unported and had stock valve sizes! Posted on May 07, 2014 by promarengine. Within a few hours of his discovery, the engine was sitting in the back of his truck on its way to a new home. He'll have to get a gear for his distributor. The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. They almost seem like flywheel numbers rather than RWHP numbers. 1983 Mustang G.T. With the GT-40P heads you will need to back off the timing a couple degrees and bump up the fuel pressure. I just read about this build on the corral.net. What would be the best cam and springs to use for these heads in a 302 Windsor? (Please note these are not GT40P Explorer heads). Learn how your comment data is processed. The engine never huffed oil out of the breathers, and the spark plugs all looked excellent. I am very happy too. But the part about a cam replacement possibly being a labor intensive undertaking is correct. Best of all, no machining is required to install these on your stock cast iron heads! Your email address will not be published. All this is worth it. . Aftermarket headers, such as those made by Hooker, BBK and Competition Engineering, are better and are just as easy, if somewhat more expensive, to procure used. Joined: Sun Mar 15, 2009 9:31 am. hole size 302 is 7/16 and 351 is 1/2 We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. K.S. If you dont feel comfortable doing this higher a pro. GT40s have 64cc chambers. Shop by category. 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. Understanding Ford's Fox Body GT40 Cylinder Heads - CJ Pony Parts Someone does make the Tri-Y's headers for the early Mustangs using the "P" heads. by travis Sun May 03, 2020 8:33 am. Test 1: 750-cfm carburetor, dual-plane intake manifold, and stock camshaft. These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. And have discovered something that I dont think anyone else knows. Also, you'll need to get a steel distributor gear to replace the iron gear that is currently on your distributor. All costing in the end at least another $2k. Free shipping. When combined with modern power-makers, such as nitrous, the 302 is more than capable of producing 400+ horsepower for little more than the cost of a stock engine rebuild. SB Ford GT40 Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. Location: Re: Stock Ford 351W 4bbl dyno numbers. I am working on a set of iron GT40s hoping it goes faster. Supercharging GT40p heads | Modded Mustang Forums 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. Small Block Ford 289/302/5.0L/351w 180cc/60cc Aluminum Cylinder Head E42004. *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. that is a healthy budget deal. How much HP and torque do you think I. 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. United Engine and Machine sells cheap but decent pistons that will do what you're wanting. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. For a better experience, please enable JavaScript in your browser before proceeding. The only way to really make more power is to go with a stroker kit, blower and/or heads. 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. Over $2050 for the 165/185 renegades. Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. Now we know why Dennis Hilliard of Central Coast Mustang is so high on these heads. That's more than enough to feed a power-brake booster. Good on ya Jeff Smith. 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. I have a very good running stock 1981 302 in a F100 short box. 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. T5 with 3.73s. This is not a criticism but instead consider it to be more of a heads-up. 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. The valve seats have been cut on a . 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! Even with a stock Mustang 5.0 cam makes good power. Also, the spark plug angle makes it a pain. 302 heads on 351w | ClassicBroncos.com Forum Very true about finding them at the local yards. Mac and Ford Motorsport both make a GT40P spacific header. The factory heads have a boss for the exhaust valve that restricts flow through the exhaust port. 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. 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'll save the effort and lighten my front end by 50# with aluminum. I got a GT40P off the assembly line years ago. 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. Or, you could invest in a new set of heads that would also do the same job but you can expect to spend quite a bit more money. 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. E303 Cam advanced 4 degrees. 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. Performance & security by Cloudflare. If you're running a stock cam, 1.7 rockers will work perfectly. Shop by category. 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. $169.50. Aside from the cost of the nitrous itself, this setup should cost you little more than a stock rebuild using all brand new parts. 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 have managed to get 402 horse power from a 289 hipo natural aspirated. So . Install a set of 1.7:1 roller-tipped rocker arms on the heads. GT-40P Heads - 5.0 Mustang & Super Fords Magazine - MotorTrend A forum community dedicated to Ford performance owners and enthusiasts. Pride is built, in your garage, with your two hands. the springs are new stock oem ford. Gt40/gt40p Heads On A 351w Questions - StangNet Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. The Fora platform includes forum software by XenForo. Anyways, I know the gt40ps will bump . Calculated compression to 9.8:1. 950.00 us a set and will ship . Gt40 heads/intake from a jy explorer, leave the . For all of us interested in Gt40p heads. 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. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 SBF OEM | eBay Motors, Parts & Accessories, Car & Truck Parts & Accessories | eBay! 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. We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. Not sure how they would mate up to your existing exhuast, but otherwise they should work. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. 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. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. I've not seen a set of longtubes that have an issue with GT40P's, either. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. We've already been motivated to put this engine in a buddy's Mustang. 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. 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 There is a better way. This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. 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. GT40, GT40P, would be great factory heads. Scorpion 1.6 roller rockers. how hard to put on? Then why did you port the heads and how do you know if you made an improvement. Not sure about that but got some pictures of the cast iron explorer manifolds on a 302. Their weak point is that the rotator used on the exhaust valve is very thick. Works on all factory cast iron E7, GT40, and GT40P cylinder heads! Ford 302W / 5.0L History & Specifications - The Ranger Station This test went so well that we were eager to see what the slightly bigger cam would do. Ask Away! with Jeff Smith: Camshaft and Cylinder Head Recommendations 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. Its funny no one mentioned anything about ignition timing or components, Your email address will not be published. 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 . Holten runs the factory fan, but he had removed it when he ran the 12.63. 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. Compare. 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. Mustang Cylinder Head & Camshaft Guide (79-95) - LMR However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. The GT40P heads flow a lot better than stock 351 heads. A solid 300-325 hp should be plenty and that's with good drivability and reliability as well. When building an engine there is a lot to take into consideration. The gt40p head is considered the best OEM 302 head made. I have a 432 HP non Hi Po 289 I built. 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. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. You could run a thinner head gasket as well. Install a set of 1.7:1 roller-tipped rocker arms on the heads. 302 GT40 Dyno Results - FourEyedPride.com document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. A bone stock 2bbl early 351w with stock replacement forged pistons (9.0 compression) and dyno headers made 211 Hp . This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. For the most part 302 heads and 351W heads are the same. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. 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. This will keep you from dropping your overall static compression ratio and losing power. 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. We are offering a pair of original Ford Cobra 5.0 GT40 cast iron cylinder heads. Take the assembly to a machine shop to have it balanced and install it in the block. The Fora platform includes forum software by XenForo. You need to check. On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. What you are trying to do is to increase the amount of airflow through the engine in order to make more power. If you know him, ask him. 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. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. 1.7 shaft rockers and beehives. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. Keep in mind that swapping camshafts is a fairly extensive effort. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada.
