Quote from: TA Coupe on December 03, 2025, 08:39:49 PM[Posi. Regular Gas. This was back in the Mid 80's. Un-Capped that beast sounded like a Top Fuel Dragster. I really miss that Car. Got pulled every weekend doing 20 to 25 over and never got a Ticket]
How did you manage to run regular gas with 13 To one compression ratio?
VTGT500,
About 20 years latter I took advantage of CNC ported Edlebrock heads with JE pistons to suit chamber profile. Also upgraded to Dove shafts and rocker and with a 294S cam. Three days on a SuperFlow dyno tweaking air:fuel and timing on pump gas best we could garner was 483 HP. In the ball park of what's written about the GT40 program.
Why do built FE engines seem to struggle to get much past 1.1 horsepower per cubic inch? 483hp seems awfully low to me for a built motor but I have read similar figures about other motors also. On the dyno, my 302 cubic inch motor with just 9.9 compression, but running 2x4 holley's made four hundred horsepower. Doesn't seem right that a 427, with 125 cubic inches more than my engine made only an extra 83 horsepower.
Roy
I ran regular Pump Gas and it was my daily Driver. I believe we still had Leaded Gas back then and I would sometimes pour in that 104+ additive. Other than that, I don't know what to tell you. If it sat for a couple Hours, I would have to pump the Peddle about 15 times to wet the Cylinders to get it to turn over and crank.


