243 Head milling
Race Director
Joined: Oct 2002
Posts: 16,477
Likes: 26
From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
61-62cc with a .040" gasket should put you at about 11:1. That would require approx .015-.020" milling.
The benefit of more compression, simply put, is more power and torque at all RPM's. Few other engine mods can do that. Maximizing your CR for the octane gas available to you is the smart thing to do. Even with 91 octane, 11:1 should be just fine, and very well worth the small cost of the head milling.
The benefit of more compression, simply put, is more power and torque at all RPM's. Few other engine mods can do that. Maximizing your CR for the octane gas available to you is the smart thing to do. Even with 91 octane, 11:1 should be just fine, and very well worth the small cost of the head milling.
