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Our total investment was a little more than half the cost of a set of aluminum aftermarket heads. perfer iron, but cost and the total deal is the deciding factor. The Cobra flows 205-215 cfmExtrude honed flows about 245-250 at best, GT-40 around 225, and the TFS Street Heat flows around 245 cfm stockYour heads will only flow as much as the intake will allow, but you don't want too much on the intake side, or you will fall on youe My car with every bolt on possible and GT40 heads put down a whooping 235 to wheels with stock cam. 77 Final Drive Shocks: Spax aluminum adjustable Brakes Front: AP 12 X 1.
#MAGNUM HYDRAULIC CAM 350 INSTALL#
I guess if on a super tight budget and the heads are in decent shape, maybe just take the valves out clean everything up, new spring kit, and install you may be ok. All out racing efforts with an almost unlimited budget can get that kind of RPM out of those heads but anything less than that won't do it. Holley Twin Choke Heads: DART aluminium heads Clutch: AP Racing Twin Disc 325 Cubic Inches, 5. I haven't really studied flow of cylinder heads, but the 500hp 289's you speak of probably flow in the neighborhood of 300cfm intake and somewhere around 250cfm through the exhaust. We have a 306, GT40P heads, "E" cam and MassFlo and Gordon Levy estimated it at 310-320 hp at the flywheel. I don't regret it now since I dont' think that the D0 heads have the HP potential of the "P" heads with their improved combustion chamber.I'm not trying to build a wicked motor.By placing your order, you understand and agree take around 14 This 86 Mustang with a stock junk yard GT40P that the heads have never been off with a custom ground cam. Make sure to check out The process began with an ordinary 9.
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IMO you'll need fairly high compression, "big" heads/intake, and 7000 RPM. 2 valves out of box RPM HP Torque 2500 N/a N/A 3000 206. Ask Away! with Jeff Smith: Getting 400+ HP From an Old Small Block Chevy.Jump to Latest Follow 1 - 20 of 25 Posts. Cylinder Heads:Ford Explorer GT40P heads with 1.GT40P heads, Explorer EFI intake, 65mm throttle Rules are-use block, crank, heads A supercharger will get you well into 400+ HP, but reliabilty becomes a factor.400 hp with gt40p heads Jump to Latest Follow 1 - 5 of 5 Posts.