Quote:
Originally Posted by arpad_m
I can attest to this based on my car as well. Initially I had only a blower with a single low side fueling enhancement (JMS), it made 560 rwhp on the dyno at 7.5 psi of boost, but at the drag strip it started "dying off" past 110-112 mph, I could literally feel the "oomph" go away once I hit 5th gear (the big rpm drop in the 8L90 doesn't exactly help there either). Nothing wrong with the setup or the tune, it was a compromise I understood.
Then, once we moved to the current setup with headers and a forged bottom end (leaving nothing but the LT1 block as stock), full LT4 fueling, flex fuel capability and a smaller pulley for 10-11 psi of boost with the appropriate tune, the car is now pulling like a banshee even at 140 mph, with no knock retard or any audible knock whatsoever even on 93 pump gas. Needless to say, it runs even better on E50-60, it's close to scary, which is exactly how I want it.
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Thanks Arpad for this input. When the forged Rods & Pistons went into the motor, did you/ the shop have to take out the motor, or was it done with the motor remaining inside the engine bay? Did you have the RA balanced and blue-printed as well?