how much of a hp gain would you get out of a 4lb pulley with a predator tune? and what kind of a time increase in the 1/4 would you get if you were on drag radials with the pulley? im talking about with a stock truck and what would you guys say a stock truck with a 4lb pulley drag radials and a 75 shot would run?

 

can't give you hp... but chip pulley and filter gave me about 6 tenths at the end of the 1320...............

PEacE.........................
Jim

 

hp gains are all different. Depends completely on the tune.

On MOST lightnings, a 4lb pulley with a tune should put you in the 12.8 range.

On Drag radials, you could squeeze some 12.5-12.7's.

Add a 75 shot and your will be approx in the 12.1-12.3 range.

All depends on weather, track prep, altitude.

Good luck.