atc 200 piston

[Kellan_723]

noticed stock was 7.8 to one
Wiseco makes a 10.25 to 1 and a 12 to 1
How much of a difference does the 10.25 do?
What about the 12 to 1?

Would you need race gas for the 12 or would 94 octane work plus ocatane booster?

Thanks

[justin85]

U should be ok with 94 octane at 12:1, but i wouldn't go that high. The higher you go the less reliable. I would consider the 10.25:1 to be the better choice.

[Kellan_723]

How about power and performance wise?

[justin85]

You will make more power the higher you go.