I read somewhere on here that a +3 crank would increase my compression .5... Is this true? This would make it a 13:1 then? What octane do I need to run then or what mixture of race fuel and pump gas? Also, what cubic inches will this be then? I sill haven't put it together but working on it.
Its kind of tricky. I think you have to find out if the compression of your piston is based on the 04-05 crank or 06+ crank.
When I put mine together Diesel told me that the CP wicked was based on 04-05 so the 13.5 on an 06 crank was actually 13, but the extra of the +3 adds .5 compression so it was a 13.5:1
Its kind of confusing and probably doesn't make that big of a deal, but its something to check. Maybe terse can help you out a little more. He's good.