I just finished putting in my new motor, got 250 miles on it so far. I'm just wondering what the compression ratio might be with 58 cc heads and if its safe to run on 93 octane? It seems to be fine so far, although I haven't really driven it hard yet since its not broken in. The setup is in the sig. I'm not sure of the head gasket thickness, it came with the kit from summit.

 

Well, with flat tops, you are kinda pushing your luck, but you may be able to get away with it.

A set of pistons with a little dish would be better though.