Russ Payne

Hey peeps my series 2 is having another engine rebuild, i am putting accralite pistons in it but am a little confused by the compression ratio, they say 8:0:1 but it also says they may need machining for the correct ratio, bringing me to my question of what is the ideal compression ratio, i am going to be running 18-20psi

fredy

i would go for 7.5:1 up to 25 psi boost