A COMP hydraulic roller cam we found works well with this combination. A good port job can set you back another $500-$1,000. So I've got the motor and heads already for my maverick project. There are a couple of reasons for this suggestion. 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. 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. For a better experience, please enable JavaScript in your browser before proceeding. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. I'll save the effort and lighten my front end by 50# with aluminum. You can have your current 28 oz rebalanced to 50. We've already been motivated to put this engine in a buddy's Mustang. Free shipping for many products! Not *as* good as the GT40p heads, but I'd prefer to not have to worry about exhaust fitment issues, or have a narrow range of what I can work with. That's a good combo in my book. For 2018, the Coyote makes 460 hp. He'd be the best source. Weiand 7515 xcellerator intake. JavaScript is disabled. 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. Where they differ is the combustion chamber size. Similar to regular GT-40 heads, the biggest difference between the two is that the P-heads feature a revised spark plug angle which extends the plug into the combustion chamber, putting the flame front close to the absolute center of the chamber, resulting in a smoother combustion process. The later model distributors had a different diameter shaft than the earlier ones. If you're going to use the stock 289 heads, install 1.84-inch intake valves, then port the intake and exhaust; these mods will net you about 185 cfm of intake port flow at 0.50 lift. 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. Long tube headers are a terrific idea, but you need to open up the exhaust side. These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. Be careful, I was once bitten by one of those reptile engine builders. BONUS TEST-FOUR DIFFERENT 302 INTAKES.. You didnt mention what camshaft you would be choosing or exactly which 5.0L Ford Windsor engine you are working with. hole size 302 is 7/16 and 351 is 1/2 We didn't increase the valve size, although we did have to add Manley valves to get the proper spring-installed height. No-option stripper- I like strippers. ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. This needs to be removed and different exhaust valves, retainers, and valve springs added to turn this into a decent street head. Well also assume that this engine is running stock exhaust manifolds. Do you guys have part numbers for the spring kits? The reason for this is that we're actually replacing mildly worked E7TE heads. Aside from the cost of the nitrous itself, this setup should cost you little more than a stock rebuild using all brand new parts. In a 3,250-pound car like a Mustang with 3.50 gears and an automatic with a 2,800-rpm converter, this 5.0L could pull 12.80s at 108 mph. That said there are some better aftermarket options for heads also. 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. However I think the opportunity window is slowly closing. Scorpion 1.6 roller rockers. Mac and Ford Motorsport both make a GT40P spacific header. Let us explain. This is an older thread, you may not receive a response, and could be reviving an old thread. Slover primarily focused on the exhaust side of the GT40P heads. Because of this, your tuneup will probably need to be modified. $700.98. . Just make sure it is a roller cam. 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. It's an 86 roller 5.0 engine that had a recent rebuild sometime in the past with keith black pistons, otherwise stock. JEGS High Performance. SB Ford GT40 Drop In Valve Springs Kit, Hyd Roller w/ Stock Cam, .450" lift and below. 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. fordfan289, Aug 27, 2011 I've got gt40p heads for it I'll be running, and can't afford better . VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. 1.7 shaft rockers and beehives. After we installed the heads and with the fan off, he ran a 12.46 at 107.9. That's fantastic for the minimal investment we made. The GT40P heads flow a lot better than stock 351 heads. The GT40P heads flow a lot better than stock 351 heads. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! I spin it to 6500 and thats about it. Not sure how they would mate up to your existing exhuast, but otherwise they should work. 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. .. i would not buy valves unless you need them amd would not switch to studs with these heads for your low hp . You will have to address the 50 oz balance of the 5.0 engine by getting a 50 oz flywheel. SBF engines are modified constantly. The tube headers showed a gain of almost 100 hp! You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. Holten's best time is a 12.63 at 105.9 mph, and if we gain the desired result he will be right in the thick of things in Trophy Stock competition. 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? That's more than enough to feed a power-brake booster. 302 .030 over with; Scat Forged Steel Rods, SpeedPro pistons and rings . Sponsored. 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. All costing in the end at least another $2k. Anythoughts? 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. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. We gained 45 hp and 40 lb-ft of torque. I am very happy too. 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. You'll have to plug the oil hole that is in the engine from the old oil dipstick. These cast piston short-blocks are not quite as good as the forged piston 5.0L that came in Fox-body Mustangs, but the GT40P heads flow much better than earlier 5.0L heads. made more power everytwhere and 40 hp is respectable. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. But the part about a cam replacement possibly being a labor intensive undertaking is correct. Everything fits, use the stock rockers and pushrods. Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) - GT40P heads? Dennis Hilliard of Central Coast says we can expect to gain three-tenths in the quarter-mile. I am working on a set of iron GT40s hoping it goes faster. never messed with the timing, its at 35* total . FULL DYNO RESULTS. Despite adding 30 degrees of intake duration, this cam improved torque throughout the entire test from 3,000 rpm on up. 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 may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. i have a 302 engine from a 1977 granada and i am wondering if gt40p heads from an explorer will fit on this motor. Gt40 heads/intake from a jy explorer, leave the . That's an improvement of 22 hp over Test 2. The newer camshaft is designed for use with a soft bronze distributor gear, not the hardened steel gear used for older camshafts. Even with relatively small valve sizes of 1.85-inch intake and 1.46-inch exhaust, the P-heads flow much better than previous. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. For the first test, we were reusing the stock Explorer cam, so the engine didn't need any break-in time. I'd much rather be able to drive it at 8 or 9/10s of what it can handle. 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. I turned it because it was tired when I got it. 950.00 us a set and will ship . Install a set of 1.7:1 roller-tipped rocker arms on the heads. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. Stock valve sizes? There are too many variables to add to this regarding aftermarket stroker kits or components. GT40p heads peak horsepower was [email protected] with 363ft/[email protected] The worked 351 heads showed peak . These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. HAD '82 GT monochromatic (red).black cloth HAVE Is asking advice for a fairly common situation involving parts with mandatory compatibility between the two for performance and longevity. 1983 Mustang G.T. We compare the GT40s to modern cylinder heads as well as other heads from the era. 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. Without changing the stock pistons. 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). 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. Horse Sense: The smaller valves found in GT-40P heads improve airflow velocity. 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. 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. Your email address will not be published. If they are cheap enough, take them anyway. You could run a thinner head gasket as well. If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. Late-model ford GT40 and GT40P heads with 1.84-inch intake valves will also flow 185 cfm at 0.50 . Thank You. SB Ford, GT40 .575" Lift Max Output II Drop in Valve Spring Kit, Hyd Roller, 140 Lb Seat. This time around, we chose a shining example of this junkyard art form. Nudge us with emails, and we'll make it happen. He'll have to get a gear for his distributor. ford 302 sbf gt40p v8 cast iron complete cylinder head and head bolts and head gasket set. Over $2050 for the 165/185 renegades. The asterisk HP differences are calculated using Test 1's 294-hp peak. We are offering a pair of original Ford Cobra 5.0 GT40 cast iron cylinder heads. Ported Hurricane Single Plane and custom 750 HP. 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. For a better experience, please enable JavaScript in your browser before proceeding. Step 1. 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. The heads that were used were also old C8 casting with 58cc chambers. On the power side, we selected 400 hp as an impressive but reasonable output for our small-block 5.0L Ford. 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 also added a veteran Ford magnetic pickup distributor and used it to drive an MSD ignition system. While the heads were off getting a massage, we turned our attention to the cam timing. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. 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. Test 1: 750-cfm carburetor, dual-plane intake manifold, and stock camshaft. Never not once have I ever seen a SBF rod bolt create a failure. 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.

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