ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. Very true about finding them at the local yards. I spin it to 6500 and thats about it. how hard to put on? The entire front accessory drive and timing chain cover must be removed, along with the distributor and intake manifold. Sponsored. 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. Actually the regular gt40's in either aluminum or iron are the good ones but the gt40p's are only a slight improvement over regular 302 heads. He'd be the best source. 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. 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 action you just performed triggered the security solution. how much HP and torque? Learn how your comment data is processed. 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. 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. 302 .030 over with; Scat Forged Steel Rods, SpeedPro pistons and rings . Start with any 302 block, but try to find one from 1985 and up since it will already have provisions for a roller camshaft. 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! Here is my setup. Within a few hours of his discovery, the engine was sitting in the back of his truck on its way to a new home. 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. by travis Sun May 03, 2020 8:33 am. 1 - 7 of 7 Posts. . 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. this head is complete with new 1.837 int valves and 1.536 exhaust valves. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. Through Central Coast you can have the heads fully prepped for your combination. The combination of this cam with your intake and headers will produce a very nice street engine. Hey all, I'm working on building a 302 with my gt40p heads. Sure, you could race-port the existing E7 castings, which many have done, but then you're putting quite a bit of change into stock heads. All Ford Mustangs | Model Specific Forums, GT-40P Heads - 5.0 Mustang & Super Fords Magazine. With the tuning finalized, the little cam made far more power than we expected, cranking out 328 lb-ft of torque at 4,200 and 294 hp at 5,400 rpm. The reply has so many assumptions that I cant even assume to know the answer. It turned out we were conservative on both counts. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 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. 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. 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. Every thing he tells you on this site is true. I added a link to it. I'll save the effort and lighten my front end by 50# with aluminum. JavaScript is disabled. Win or lose, if you buy the ticket you must take the ride. Check my post above. at the crank. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. HAD '82 GT monochromatic (red).black cloth HAVE In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. For the first test, we were reusing the stock Explorer cam, so the engine didn't need any break-in time. Nudge us with emails, and we'll make it happen. 69.90.139.244 Free shipping for many products! They work, but present their own challenges. If you go with a diffrent cam, make sure you change springs, The Trick Flow kit comes with everything for around $130. Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. 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. $700.98. Also, you'll need to get a steel distributor gear to replace the iron gear that is currently on your distributor. It's a classic move we've pulled off many times. You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. 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 Ford Mustang owners and enthusiasts. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. We turned to Rare Auto Design in Orlando for dyno tests to find out how much horsepower we gained. With nitrous, this is easily a mid-11-second ride. The tube headers showed a gain of almost 100 hp! P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. 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. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. I guess someone could just do a basic valve job and throw on the GT40 upper/lower intake for a cheap HP boost. I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. He'll have to get a gear for his distributor. I guess I had it backwards, sorry about that, didn't mean to spread misinformation. Step 2. You keep stock drivability, and stock gas milage if you can stay out of boost. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 SBF OEM | eBay Motors, Parts & Accessories, Car & Truck Parts & Accessories | eBay! You didnt mention the car this engine is in, but lets assume there is enough room to remove the radiator and any other coolers and perhaps some or all of the front grille and/or brackets before the cam has sufficient room to exit the front of the engine. thats after 3 hours of idling/midrange hits to tune the idle and part throttle . That's a good combo in my book. The question was whether we wanted a torquey small-block or a more cammed-up rpm engine to boost peak horsepower. We've already been motivated to put this engine in a buddy's Mustang. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. (Please note these are not GT40P Explorer heads). Thanks. Well that article just got me very ancy, I want these heads!! 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. (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. No-option stripper- I like strippers. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! Its funny no one mentioned anything about ignition timing or components, Your email address will not be published. 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. fordfan289, Aug 27, 2011 Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. What would be the best cam and springs to use for these heads in a 302 Windsor? Where they differ is the combustion chamber size. This is what I recommend to everyone who is doing a budget 5.0 build. 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. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. That's fantastic for the minimal investment we made. Ford Factory 5.0 Performance Cylinder 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. Calculated compression to 9.8:1. The 2 heads are about the same when looking at the numbers with the GT40p heads having a slight edge. Ill do springs and a moderate cam and go for a good, dependable power plant. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. 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. 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. You'll also have to use your 289 timing chain cover since it has a hole for the oil dip stick and fuel pump. That's an improvement of 22 hp over Test 2. many thanks to all you eco-hippies giving me dirty looks and helping me feel llike an overall badass rebel. .. i would not buy valves unless you need them amd would not switch to studs with these heads for your low hp . hole size 302 is 7/16 and 351 is 1/2 Compare. 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. Generally expect with a good cam, intake, roller rockers and a good ignition system to see around 300-350 max rear wheel horsepower, depending on what type of dyno you use. You can have your current 28 oz rebalanced to 50. Good on ya Jeff Smith. I'd get the gt40 setup, and put an s trim on it. never messed with the timing, its at 35* total . The Fora platform includes forum software by XenForo. Don't let the fact that the iron GT40 heads have a larger exhaust valve fool you. Its NA but makes use of AFR heads and some other aftermarket goodies. Yea. 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. The MPH was there to run a little better but the local track is about terrible. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. I had those on my car before I upgraded and they were nice heads. JEGS High Performance. You will have to get special headers to fit these heads since the spark plugs are angled differently than normal 5.0 heads. Yes- thank you. 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. Sponsored. I got a set of AFR heads , night and day. For a better experience, please enable JavaScript in your browser before proceeding. This will follow the guideline of a 1.6 rocker baseline and factory bottom end 79-95 related 5.0L Mustangs only. This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. You can email the site owner to let them know you were blocked. It runs smooth but seems lazy. We then dyno'd the car without the fan to get some consistency and were rewarded with a peak of 316 hp at 5,500 rpm, and 348 lb-ft of torque at 4,000 rpm. 1979 Indy 500 Pace Car. 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. For all of us interested in Gt40p heads. Both have very similar valve sizes, but the GT40P head has slightly larger combustion chambers for a small bump in compression and better flow. So I've got the motor and heads already for my maverick project. The heads that were used were also old C8 casting with 58cc chambers. A forum community dedicated to Ford Mustang owners and enthusiasts. I've not seen a set of longtubes that have an issue with GT40P's, either. If they are cheap enough, take them anyway. 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. Not to mention, they will run circles around GT40P's out of the box. (its not their engine) Stock heads with a fresh 3-angle valve job, shorty headers, T5, 4.10s, stock Explorer intake and stock '88 GT short block with 140,000 miles on it and an E cam in it. Beyond the engine's amazingly good appearance, Moore had a couple of good reasons for choosing this engine. Keywords Test 2: Changed to the smaller of the two Lunati camshaftsno other changes. . I have a 432 HP non Hi Po 289 I built. That's more than enough to feed a power-brake booster. Also, the spark plug angle makes it a pain. Like I said lots of options. Because its all been done time after time after. Assuming the above configurationa pushrod 5.0L will potentially make between 250 and 260 hp. Take the assembly to a machine shop to have it balanced and install it in the block. Install a set of 1.7:1 roller-tipped rocker arms on the heads.