Ron Earp
Admin
Well, we're about done with my "new" old motor. I worked with a local Ford engine guy, Billy at a local shop called T-Hoff, to spec out a motor more suited for an Audi gear box. I finally came to the conclusion there was no real way around the gearbox problem in that the ring gears of these transaxles (except ZF, some Porsche) are numerically high and they "want" high revving motors. So, I thought I'd re-think my motor and provide something that can rev high.
Our target for this motor was an engine that could take 7700 RPM for track use and live to tell the tale. Here are the basic specs, there are a lot of things I don't have listed such as dizzy, windage tray, cam drive, rockers, ARP fasteners used throughout, etc.
*342" Sportsman block, no overbore, new block, relieved
*Forged Eagle stroker crank
*Billet crank girdle
*Forged H beam rods
*Ported AFR 185 Heads, 2.02" In 1.60" Ex, race three angle valve job - flow is amazing!
*Double coil race springs, 600lb open pressure, 260lb seat pressure
*Compression 11.3:1
*Solid roller cam specs - 0.676" In, 0.673" Ex, Duration at 0.050" lift 256 In, 262 Ex; Advertised duration 287 In, 295 EX
The target hp goal for this motor is around 530. Basically, this engine is identical to one that Billy used in an engine builders competition that was able to make 538 fwhp at 7400 RPM on 93 pump gas, and much less torque, which is a good thing. I think this will be a nicely suited motor to a GT40 character, high revving, high power, and will do well on road courses. Now, I just need a car to put it in......
Ron
Our target for this motor was an engine that could take 7700 RPM for track use and live to tell the tale. Here are the basic specs, there are a lot of things I don't have listed such as dizzy, windage tray, cam drive, rockers, ARP fasteners used throughout, etc.
*342" Sportsman block, no overbore, new block, relieved
*Forged Eagle stroker crank
*Billet crank girdle
*Forged H beam rods
*Ported AFR 185 Heads, 2.02" In 1.60" Ex, race three angle valve job - flow is amazing!
*Double coil race springs, 600lb open pressure, 260lb seat pressure
*Compression 11.3:1
*Solid roller cam specs - 0.676" In, 0.673" Ex, Duration at 0.050" lift 256 In, 262 Ex; Advertised duration 287 In, 295 EX
The target hp goal for this motor is around 530. Basically, this engine is identical to one that Billy used in an engine builders competition that was able to make 538 fwhp at 7400 RPM on 93 pump gas, and much less torque, which is a good thing. I think this will be a nicely suited motor to a GT40 character, high revving, high power, and will do well on road courses. Now, I just need a car to put it in......
Ron