Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. We gained 45 hp and 40 lb-ft of torque. It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. 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 You'll also have to use your 289 timing chain cover since it has a hole for the oil dip stick and fuel pump. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS. I ran the Speed Pro L2488 pistons and it had me around 9.9 compression with a .041 head gasket, Now I had GT40 heads milled .020 and so that's just a guess on the CC. But dont think that adding a bigger camshaft will make more power. The Edelbrock Performer RPM is a good choice, but Holley, Weiand and Ford Motorsport also have similar offerings. They fill that spot between power and budget. We also discovered some issues with the GT40P heads that required changes, so we added valves from Manley that eliminated the exhaust-valve rotators and allowed us to set the proper valvespring installed height. The GT40P heads flow a lot better than stock 351 heads. If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. This 1979-1995 Mustang cylinder head and camshaft guide will overview the heads and cams we offer and how they will coincide. The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. 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. We also added an Edelbrock Performer RPM dual-plane intake and a set of 158-inch headers with no mufflers. The results were a major increase in power throughout the entire rev range, with an increase of 60hp at 4500rpm through to a peak of 279hp at 5800rpm. We know what you're thinking--only two-tenths from an extra 45 hp? Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! Anyways, I know the gt40ps will bump . 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. It's a classic move we've pulled off many times. We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. Without changing the stock pistons. Test 3: Installed the larger Lunati camagain, no other changes. Its NA but makes use of AFR heads and some other aftermarket goodies. 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. 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. Since the engine is nearly stock, we would want to choose a relatively mild camshaft with somewhat more lift and duration than stock, but again not going too aggressive. Thank You. These are some of the pictures I have showing the Explorer manifolds. (its not their engine) The action you just performed triggered the security solution. 1 - 7 of 7 Posts. But the part about a cam replacement possibly being a labor intensive undertaking is correct. First, adding headers will improve power on the existing combination. Gasoline/Diesel all makes on earth & still doing it today with great pride.Feel free to contact me anytime. I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. bmcdaniel, Feb 17, 2004 #7. v8maverick Member. With the P-heads requiring pedestal-mount rockers, we also called up Crane Cams for a set of 1.6 pedestal-mount roller rockers. I must agree with Jeff Smith. PTP Engineering front suspension and 25540R17s all around. 69.90.139.244 THANKS VERY MUCH! Early Windsors tend to have fairly restrictive exhaust manifolds, making the addition of a set of headers that much more efficient. I'm using the Trick Flow stage 1 cam with 1.7 roller rockers. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. That said there are some better aftermarket options for heads also. The "P" heads flow better. The reply has so many assumptions that I cant even assume to know the answer. Everything fits, use the stock rockers and pushrods. A forum community dedicated to Ford performance owners and enthusiasts. Trick Flow Mustang Valve Spring Upgrade Kit - Cast Iron Head (79-95) But don't think that adding a bigger camshaft will make more power. people can stop saying that adding aftermarket cam with stock heads is a waste of time. 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. I'd get the gt40 setup, and put an s trim on it. Save narve00 Here is my setup. GT40P heads, what kind of performance do they give? Good on ya Jeff Smith. 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. Maybe I'll think about a cam swap? GT40P heads? how hard to put on? how much HP and torque? Long tube headers are a terrific idea, but you need to open up the exhaust side. Choosing pistons to complement GT40P heads - MustangWorks.com I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. We've already been motivated to put this engine in a buddy's Mustang. the springs are new stock oem ford. i know a guy who used to build race engines so he has all the right tools, how much would it help to get the heads ported and polished or anything else he could do to them. 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. This combination should be good for about 400 horsepower and as much as 500 if you opt to use the stronger aftermarket pistons. I added a link to it. All this is worth it. Some ideas never go out of style. There are caveats to this plan, however. I got a GT40P off the assembly line years ago. 302HO with gt40p heads | Mustang Forums at StangNet Speedmaster PCE281.2046 Small Block Ford Aluminum Cylinder Heads 62cc A trip to Orlando Speed World provided us with updated quarter-mile times. Now he serves as a regular contributor to OnAllCylinders. 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. Yea. 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! But what we were most impressed with was the solid gain in torque over the smaller Voodoo cam from 3,500 and up. Rowe studied engineering, philosophy and American literature at Central Florida Community College. At the dragstrip, we gained two-tenths and 2 mph. All costing in the end at least another $2k. $700.98. Test 2: Changed to the smaller of the two Lunati camshaftsno other changes. Within a few hours of his discovery, the engine was sitting in the back of his truck on its way to a new home. Gt40 heads/intake from a jy explorer, leave the . The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. Using the manufacturer recommended springs for your camshaft are a safe bet. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. This time around, we chose a shining example of this junkyard art form. Budget 300HP 302 Build What you are trying to do is to increase the amount of airflow through the engine in order to make more power. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. Yeah, except those. a) ain't early and b) aren't 289 heads. I need that part number too! 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. 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. 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 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. There are literally a dozen or so camshaft companies that offer a mild hydraulic roller cam for a 5.0L Ford. timing and compression ratio with gt40p heads - Modded Mustang Forums Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. 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. The GT40P cylinder heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. K.S. Hey all, I'm working on building a 302 with my gt40p heads. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. 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. What did the heads flow? The factory heads have a boss for the exhaust valve that restricts flow through the exhaust port. JEGS High Performance. Calculated compression to 9.8:1. GT40p heads peak horsepower was [email protected] with 363ft/[email protected] The worked 351 heads showed peak . Stock valve sizes? Is asking advice for a fairly common situation involving parts with mandatory compatibility between the two for performance and longevity. thats after 3 hours of idling/midrange hits to tune the idle and part throttle . That's a good combo in my book. I got rid of the carburetor and went with a F.A.S.T. 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. I was looking at putting on the GT40P heads on. Calculating pushrod length Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. 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. #3::: Do your homework,get quality parts,dont skimp. 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. I have been working on Fords for 40 years and I have experimented with a few tricks of my own. Dyno results GT40P heads | Vintage Mustang Forums 950.00 us a set and will ship . In order to make Coyote-type power you will need some expensive, high-flow cylinder heads with a short block that can withstand spinning in excess of 6,500 rpm. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. 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. While the heads were off getting a massage, we turned our attention to the cam timing. I don't need tons of power to enjoy the car. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. For a better experience, please enable JavaScript in your browser before proceeding. 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. As with Chevrolet's small-block engine, the aftermarket has had dozens of years to expand the range and reduce the cost of the parts they offer for this engine. Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. . how hard to put on? 97% Positive Feedback . Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! Choose a cylinder head before you install the pistons. You can use the stock roller lifters with any size cam you want. Building a 302-inch small-block to produce 400 hp is really no big deal, but doing. GT40Ps have 58cc. 1.7 shaft rockers and beehives. JavaScript is disabled. 99 Explorer engine (302) with GT40P heads - Ford Muscle Cars Tech Forum As noted, this is looking like hes building a 351 Lightning truck motor, which is a good way to go. Beyond the engine's amazingly good appearance, Moore had a couple of good reasons for choosing this engine. gt40p heads on a 289 in a 66 | Vintage Mustang Forums 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. Keywords This is what I recommend to everyone who is doing a budget 5.0 build. by travis Sun May 03, 2020 8:33 am. Fastest e303 5.0l's? - FourEyedPride.com What Are The GT40 & GT40P Heads? - LMR.com Here a comparison of different heads on a 302: I'm very happy with my GT40P. Performance & security by Cloudflare. Not bad for off the shelf parts and a stock shortblock. The asterisk HP differences are calculated using Test 1's 294-hp peak. The Fora platform includes forum software by XenForo. gt40p headers | Maverick/Comet Forums Never not once have I ever seen a SBF rod bolt create a failure. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. Last Edit: January 18, 2015, 12:05:31 pm by businesstrader Logged shaunp. Not looking for crazy HP. I'll prob take a trip up there this weekend after scavenging the junkyards, thanks a million. T5z and 3.89 9" TL rear. Where they differ is the combustion chamber size. MAC is the only manufacturer of these headers, and the parts we installed fit like a glove with no problems whatsoever. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. For a better experience, please enable JavaScript in your browser before proceeding. Compare. Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. Can anyone give me a little feedback about a '99 Explorer 5.0, and tell me if it's my answer. 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:?:!?!?!? Joined . 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. Features hardened 4140 Chromoly retainers, valve locks, spring shims, a spring height gauge, valve seals, and instructions. Gt40/gt40p Heads On A 351w Questions - StangNet The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. 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. 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. Richard Holdener 240K subscribers Subscribe 63K views 1 year ago WESTECH PERFORMANCE GROUP LOW BUCK, GT40P 5.0L HEADS-CHEAP &. I love my setup and it is very strong engine. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. 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. Those are really good numbers. Purchase any used aftermarket manifold for the 302 that is designed to function in the 3,500 to 6,500 power band. Runs well. 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. However, since Holten's car has an E303 cam, we didn't want the pistons and valves becoming too close, so we chose the 1.6 rockers. Headers and a camshaft will help but the engine really needs aftermarket 3/8 inch connecting rod bolts and aftermarket cylinder heads. They work, but present their own challenges. The MPH was there to run a little better but the local track is about terrible. This pushed that little Ford to a peak horsepower of 503, and that was where we stopped. 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? Well also assume that this engine is running stock exhaust manifolds. Stock 1989 5.0L HO pistons will work if you can find them. 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). LOW-BUCK 302 FORD HEAD UPGRADE - YouTube 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. I'm also have the regular GT40 heads on my current build. Ford Explorer Mountaineer 5.0 Ohv Iron 302 Sbf Free shipping. this head fits years 95-01 explorer mountaineer mercury mountaineer . Your IP: Assorted screwdrivers, pliers and vise-grips. Max hp out of gt 40 heads | Mustang Evolution Forum These are Ford iron GT-40P heads. FORD GT40p 4 BAR HEADS IN GOOD CONDITION w/ONE BOLT BROKEN After graduating from Iowa State University with a journalism degree in 1978, he combined his two passions: cars and writing. Joined: Sun Mar 15, 2009 9:31 am. You'll have to plug the oil hole that is in the engine from the old oil dipstick. If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. GT-40P Heads - 5.0 Mustang & Super Fords Magazine - MotorTrend 302 heads on 351w | ClassicBroncos.com Forum I'm running stock GT40 heads with stock 4.000 bore on cylinders and a Lunati cam with 256/262; Duration @ .050 (Int/Exh): 213/219; Gross Valve Lift (Int/Exh): .483/.499; LSA/ICL: 112/108. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. And have discovered something that I dont think anyone else knows. This is just a quick overview of the changes that need to be done. Skip to main content. Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow. You can have your current 28 oz rebalanced to 50. A bit of info for those looking to build 300+hp 5.0L/302s 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. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. E303 Cam advanced 4 degrees. If you wanted to make your engine feel strong, these would be a decent investment, but they will require some modifications. This test went so well that we were eager to see what the slightly bigger cam would do. 1979 Indy 500 Pace Car. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. We will go into more detail on the head mods in a later story in Junkyard Builder, so watch for it. I have a 302 Windsor V8 EFI engine that I converted to a 600 cfm carburetor with a Street Warrior intake manifold. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members). Add 40 to 70 HP to your 302 yourself - Factory Five Racing Forum We heated the bottle to 950 psi and hit the button at 4,500 rpm. The reason for this is that we're actually replacing mildly worked E7TE heads. What Cam and Springs to Use for GT40 Heads If I get different urges later, Ill pursue those then. GT40 Heads On A 289? | Ford Muscle Cars Tech Forum the engine is carburated of that makes a difference. Car Craft mag. 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. The Fora platform includes forum software by XenForo. The car weighs #2835 with driver.
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