is a swap to a .040 gasket thae same as a .015 mill?
#2
TECH Senior Member
iTrader: (4)
Its similar but not exact. every thou off the head reduces the chamber less than off the gasket because of the quench pad. For a stock LS1, every .0050 off the gasket = 1cc, every .0065 off the head = 1cc. Reducing the gasket tightens the quench which is good for power and knock prevention, however it brings the picton closer to hitting the head.