Im putting together a 470 low deck 4.375 bore with a set of TT ill be running E85 what are you guys running or your recommendations for piston rings? Compression ratio of 9.5 and boost levels between 10 and 15 psi.
hellfire
Hotmopr ive heard hellfire rings are hard on a stock blocks cyclinder walls?
Hard as compared to what? Ductile iron factory rings? Sure, probably, but this is now a performance motor and you have to seal it up. You put the ring in it you NEED to do the job. Plus they are not harder on stock block bores than they would be any other cast block
