What compression is the absolute most safest on 93 octane? my sig has all my mods I am trying to figure out what compression and what brand pistons to go with, I am also doing all skunk 2 valvetrain with bronze valve guides. thank you for the help also what hp range am I looking at with that compression ratio, I am at 170whp now...

 

Mid 11s to 12 max for the street. Seems to be a common ratio.

 

Yeah if you get 93 octane not like my 91octane in gold ol AZ, but yeah do not go higher then 12.1.