I added a link to it. 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. I'd much rather be able to drive it at 8 or 9/10s of what it can handle. 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. I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. As noted, this is looking like hes building a 351 Lightning truck motor, which is a good way to go. It turned out we were conservative on both counts. 1.7 shaft rockers and beehives. You could run a thinner head gasket as well. ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. 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. Some ideas never go out of style. 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. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. Calculated compression to 9.8:1. So . There was an article in Hot Rod magazine in the mid '80's where Jon Kaase was developing 351w packages. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. 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. 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. I went to a couple in Tucson and almost all the Ford vehicles that came with a 5.0 had the heads missing. For real performance, stock E7TE heads leave a lot to be desired. Free shipping. I've got gt40p heads for it I'll be running, and can't afford better . The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. We also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. Yes Mr.Smith, your column here at OAC adorned with extreme performance without power adders, or all Engine as its known, from a superior pushrod Small Block featuring almost all USA sourced modern components with the familiar smell of Ford Blue. Its NA but makes use of AFR heads and some other aftermarket goodies. how much HP and torque? This is a function of the somewhat wider lobe-separation angle of 112 degrees. If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. PTP Engineering front suspension and 25540R17s all around. He'd be the best source. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. 1979 Indy 500 Pace Car. GT40, GT40P, would be great factory heads. Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. 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. For a better experience, please enable JavaScript in your browser before proceeding. 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. at the crank. You can find them on later model Mercury Mountaineers and several other Ford SUV applications. 68stang351 Founding Member May 16, 2002 850 $930.00 + $55.00 shipping. While we've seen engine dyno tests performed with GT-40P heads replacing factory E7TE castings and resulting in a boost of more than 25 hp, we have reluctantly set our horsepower gain goal at 25 ponies, as well. These heads have been remanufactured using refaced reclaimed Factory Valves. Build Thread 1965 Fastback Project "Racesteed". Hey all, I'm working on building a 302 with my gt40p heads. by travis Sun May 03, 2020 8:33 am. the engine is carburated of that makes a difference. The later model distributors had a different diameter shaft than the earlier ones. 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. For a better experience, please enable JavaScript in your browser before proceeding. HAD '82 GT monochromatic (red).black cloth HAVE Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. 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. Note the head bolt hole issue, some GT40 iron heads had 1/2 holes, if not they will need to be enlarged. Because its all been done time after time after. We gained 45 hp and 40 lb-ft of torque. Step 2. Well assume it is a 5.0L with stock heads. Yank a motor out of the junkyard, clean it up, add a camshaft, intake, and a carburetor, and see how much power we can squeeze out of it. this head is complete with new 1.837 int valves and 1.536 exhaust valves. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. You can have your current 28 oz rebalanced to 50. 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. Sponsored. I spin it to 6500 and thats about it. You gave me the info I was looking for, and I really do appreciate it. Is asking advice for a fairly common situation involving parts with mandatory compatibility between the two for performance and longevity. I am working on a set of iron GT40s hoping it goes faster. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. how hard to put on? For a better experience, please enable JavaScript in your browser before proceeding. There are literally a dozen or so camshaft companies that offer a mild hydraulic roller cam for a 5.0L Ford. K.S. Holley 670 street avenger carb. GT40P heads, what kind of performance do they give? We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. 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. This is not a criticism but instead consider it to be more of a heads-up. 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. Definitely going to use my P heads. Weiand 7515 xcellerator intake. With the P-heads requiring pedestal-mount rockers, we also called up Crane Cams for a set of 1.6 pedestal-mount roller rockers. Never not once have I ever seen a SBF rod bolt create a failure. K.S. this head fits years 95-01 explorer mountaineer mercury mountaineer . These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. Compare. Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1.7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. 1983 Mustang G.T. That said there are some better aftermarket options for heads also. 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. The entire front accessory drive and timing chain cover must be removed, along with the distributor and intake manifold. Test 2: Changed to the smaller of the two Lunati camshaftsno other changes. 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. How much HP and torque do you think I. 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. $700.98. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. He has worked as a tractor-trailer driver and mechanic, a rigger at a fire engine factory and as a race-car driver and builder. 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. Cant wait to try um out. First, adding headers will improve power on the existing combination. thats after 3 hours of idling/midrange hits to tune the idle and part throttle . No-option stripper- I like strippers. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 68 XR7 & 68 M-100. But what we were most impressed with was the solid gain in torque over the smaller Voodoo cam from 3,500 and up. After we installed the heads and with the fan off, he ran a 12.46 at 107.9. The Fora platform includes forum software by XenForo. The engine was only rated at 215 hp, but it at least had 9.0:1 compression. Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! Late-model ford GT40 and GT40P heads with 1.84-inch intake valves will also flow 185 cfm at 0.50 . With nitrous, this is easily a mid-11-second ride. The gt40p head is considered the best OEM 302 head made. Posted on May 07, 2014 by promarengine. #3::: Do your homework,get quality parts,dont skimp. (its not their engine) Sponsored. Most of them are aware of what changes need to be completed. Im now thinking of adding a cam to match the carb. 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. Vehicle: 1972 2 door 302 maverick, 1986 5.0 stang gt convertible,66 mustang coupe, HEMI ram. Through Central Coast you can have the heads fully prepped for your combination. No-option stripper- I like strippers. Then why did you port the heads and how do you know if you made an improvement. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - anyone have experience with GT40P heads on a 92 351W - ive got a 92 F250 with a 351W that needs a pretty serious rebuild. The Edelbrock Performer RPM is a good choice, but Holley, Weiand and Ford Motorsport also have similar offerings. Now he serves as a regular contributor to OnAllCylinders. Its funny no one mentioned anything about ignition timing or components, Your email address will not be published. However there are plenty of factory heads that with the help of an experienced machine shop can be great. Be careful, I was once bitten by one of those reptile engine builders. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. 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. 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. What would be the best cam and springs to use for these heads in a 302 Windsor? It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. 302, GT40P Heads, E cam, 4 into 4, Holley 600, Mallory Unilite, Levy SD T5, 3.73, 15" Team III, firewall mod, trunk mod, trailer hitch, drivers foot box mod, front tow rings. You'll also have to use your 289 timing chain cover since it has a hole for the oil dip stick and fuel pump. They suffered from poor aftermarket support up until about 15 years ago when it really came on strong. Maybe I'll think about a cam swap? SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. JEGS High Performance. This website is using a security service to protect itself from online attacks. You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. For this reason, we're not sure what kind of boost the GT-40P heads will give. Using the manufacturer recommended springs for your camshaft are a safe bet. 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. I had those on my car before I upgraded and they were nice heads. +1 I would go with the regular GT40 heads. Early Windsors tend to have fairly restrictive exhaust manifolds, making the addition of a set of headers that much more efficient. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. 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. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. United Engine and Machine sells cheap but decent pistons that will do what you're wanting. It runs smooth but seems lazy. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. #1:::Throw out all your Magazines that suggest what to do! The specs are a conservative 212/218 degrees of duration at 0.050-inch tappet lift but offer a really nice 0.512-inch valve lift for both the intake and exhaust. Mac and Ford Motorsport both make a GT40P spacific header. I got lucky and found a complete Explorer GT40P engine online. Scorpion 1.6 roller rockers. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. I don't need tons of power to enjoy the car. This engine will be good for your 65 Mustang. If you know him, ask him. I got lucky and found a complete Explorer GT40P engine online. The 2 heads are about the same when looking at the numbers with the GT40p heads having a slight edge. 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. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. Limited header choice is certainly a challenge. Can I run the new cam with the same roller hydraulic lifters or do I have to change the lifters too? 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. Cloudflare Ray ID: 7a2e2d95dedea1e4 Check my post above. Free shipping. At the dragstrip, we gained two-tenths and 2 mph. 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. Nice to see actual dyno results instead of "butt dyno" guesses. If you smooth out the bowls and exhaust ports and gasket match the intakes they should flow decent. . 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. Free shipping for many products! There are caveats to this plan, however. However, when we dyno'd the car before installing the GT-40P heads, the fan was on the car. Joined: Sun Mar 15, 2009 9:31 am. Different years can have different combustion chamber sizes but ffor the most part there will be no performance increases by going with 302 heads. 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 . Buy the lifters for peace of mind now and hopefully for the duration. Ford GT40P 302 5.0L 4 Bar Cylinder Head Assembly Pair w/ 1/2" Head Bolt Hole. I'm using the Trick Flow stage 1 cam with 1.7 roller rockers. Along with the heads, we used MAC headers for GT-40P heads. If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. I wouldnt recommend reusing lifters though. Within a few hours of his discovery, the engine was sitting in the back of his truck on its way to a new home. With the GT-40P heads you will need to back off the timing a couple degrees and bump up the fuel pressure. The dyno recorded a peak horsepower reading of 489 hp, but the air/fuel ratio was slightly on the rich side at 11.5:1, so we increased the nitrous jet to a 61 and hit the button again. Yes- thank you. This time around, we chose a shining example of this junkyard art form. 97% Positive Feedback . 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. fuel injection system . You didnt mention which cam you had in mind. Always the weak area in the 289 and 302 is the tiny 5/16 inch connecting rod bolts and the miniscule intake and exhaust ports. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members). GT40Ps have 58cc. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. Assuming this will be a daily driver engine, a short duration camshaft, especially when combined with a four-barrel dual plane intake manifold and headers, will deliver extremely snappy throttle response and the whole combination will increase the torque and peak horsepower by somewhere in the neighborhood of 20 to perhaps 35 horsepower. 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. I have heard this rod bolt weakness myth for years but have yet to have a single problem with them in any of the SBF engines I have pounded on for the last 30 years and there have been lots of them. The Fora platform includes forum software by XenForo. 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. Do not ever, ever think about using the tube type manifolds. Overview. I'm wondering how these heads will interact with the paxton 1220 sl supercharger I'm trying to put on. An aggressive cam will wake it up a bit. Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. The newer camshaft is designed for use with a soft bronze distributor gear, not the hardened steel gear used for older camshafts. Long tube headers are a terrific idea, but you need to open up the exhaust side. The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. (A starter is a motor, windshield wipers use a motor,electric windows use motors) Any one uses that terminology in my shop will be corrected once, only once. Manual trans. made more power everytwhere and 40 hp is respectable. Central Coast Mustang sells GT-40P heads at a great price, making them a viable alternative in a market flooded with performance head choices. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. 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. I have a 302 Windsor V8 EFI engine that I converted to a 600 cfm carburetor with a Street Warrior intake manifold. The heads that were used were also old C8 casting with 58cc chambers. Going from your heads to the GT40p heads will bump your compression by about a point.so hello bottom end torque. I had a set of 69 302 heads I ran for a while . You can use the stock roller lifters with any size cam you want. Those heads were unported and had stock valve sizes! P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. many thanks to all you eco-hippies giving me dirty looks and helping me feel llike an overall badass rebel. We did a quick search for hydraulic roller cams and landed on a COMP camshaft that looked promising. 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. 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. The GT40P heads flow a lot better than stock 351 heads. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. 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. Where they differ is the combustion chamber size. Even with a stock Mustang 5.0 cam makes good power. The cost of a new set of standard replacement roller lifters is very affordable at major retailers like Summit. Ill do springs and a moderate cam and go for a good, dependable power plant. . They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. 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 GT40 and GT40P cylinder heads are highly sought after, but how do they stack up against other cylinder heads, and is it worth it to upgrade the Fox Body's stock heads? Thank You. Pretty sure that was name, but I could be wrong. LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? - I have a 1989 f150 with a 302 5 spd. If you're running a stock cam, 1.7 rockers will work perfectly. . Choose a cylinder head before you install the pistons. Shop by category. GT 500; Posts: 8496; Location: Brisbane . Joined . Now we know why Dennis Hilliard of Central Coast Mustang is so high on these heads. The GT40 & GT40P heads had a few differences that are note-worthy, the most importantly being the bump in compression. 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. I'd get the gt40 setup, and put an s trim on it. Thanks. Skip to main content. JavaScript is disabled. Gasoline/Diesel all makes on earth & still doing it today with great pride.Feel free to contact me anytime. 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. people can stop saying that adding aftermarket cam with stock heads is a waste of time. The kit offers adjustable power from 50 to 250 hp with a simple jet change. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. The Fora platform includes forum software by XenForo. Here is the lowdown on exhaust manifolds and VALVE SPRINGS. AFR 165 Heads | Have options for pedestal mounted rocker arms or stud mounted rocker arms. Performance & security by Cloudflare. The spark plug issue is almost a non-issue. Shop by category. JavaScript is disabled. Keep in mind that swapping camshafts is a fairly extensive effort. i'd love to use these heads,. Ported Hurricane Single Plane and custom 750 HP. It's a classic move we've pulled off many times. Application Fits 1979-95 Mustang 302/351 w/ OEM Small Block Ford Heads Real world data seems to show that GT40 or GT40P cylinder heads, assuming no other mods on your Foxbody, are good to add anywhere between 20-40 HP (over stock heads). The multiple-layer steel construction allows the gasket to conform to movement between the cylinder head and block while maintaining a good seal. We need a build on a 400+ hp 302/6 build. 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. Good Luck. Nudge us with emails, and we'll make it happen. That's fantastic for the minimal investment we made. Tim's junkyard refugee survived the beating and we had a bitchin' story. Those are really good numbers. We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. I need that part number too! We know what you're thinking--only two-tenths from an extra 45 hp? Good on ya Jeff Smith. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. AFR 165cc 58cc Heads. If I get different urges later, Ill pursue those then. 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. There is a better way. Assemble the rotating assembly with a stock 5.0L crankshaft, a set of 5.0L rods and the specified pistons with stock-type rings. This is just a quick overview of the changes that need to be done. I must agree with Jeff Smith. Your IP: Anyways, I know the gt40ps will bump . This is the main reason why these engines are not modified as much as the small block Chevy. SB Ford GT40P Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. Location: Re: Stock Ford 351W 4bbl dyno numbers. This will cost additional money but is still worth it, in our opinion. Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. JUNKYARD GT40P HEADS-ADD 30+ HP TO YOUR 5.0L (FOR FREE?) 02-11-2012, 07:16 PM #6 fiveoh 86lx A LOT of them do it these days. In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . 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. We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. FULL DYNO RESULTS. 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. These are some of the pictures I have showing the Explorer manifolds. This kind of improvement may not seem like much, but the owner of our test car, Jamie Holten, runs in FFW Trophy Stock where three-tenths is a lifetime. Holten runs the factory fan, but he had removed it when he ran the 12.63. How to Build a Budget 383 Stroker Chevy How do I Increase Horsepower on a 440 Cylinder Head Specifications for a 1969 How to Get More Power Out of a 92 4.3 dragster engine image by Robert Young from, Copyright 2023 Leaf Group Ltd. / Leaf Group Media. Ive been building ENGINES for 40+ years. I view the GT40P heads similar to Granada brakes. Really hurt too. MAC is the only manufacturer of these headers, and the parts we installed fit like a glove with no problems whatsoever. In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. well i finally did my first ever carb build, ive always been an EFI guy Black 1985 GT: 408w, in the 6's in the 1/8 mile. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. I turned it because it was tired when I got it. Ford Factory 5.0 Performance Cylinder Heads. 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. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. are you twisted331 also? If you have a early 351W ie pre 76 it probably . A mild porting with gasket matching will be very good. Without changing the stock pistons. 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. This will keep you from dropping your overall static compression ratio and losing power. I can tell you that with my 9.503 block, 22cc dished pistons and 64cc heads, I'm at 9.5:1 compression. 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! Car Craft mag. Install a used set of 5.0L Mustang "shorty" headers, generally available at auto swap meets for a reasonable price. If you wanted to make your engine feel strong, these would be a decent investment, but they will require some modifications. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it.
East Chapel Hill High School Death, Land For Sale In Montana With Cabin, Rokos Capital Management Salary, Ofsted Outstanding Secondary Schools In Manchester, Fargodome Covid Policy, Articles OTHER