na + lpg posted by Swifty Devil on August 23, 2006 at 05:41 AM
Message
I see that LPG has an octane rating of about 110, which would definately help in preventing knock in a TT'd NA motor. I still wouldn't boost over 10psi with it though if you want it to stay reliable. Here is a La-Z-Link from a memeber here who ran a TT'd NA that eventually failed by running 15psi on 100octane and or water injection. Turns out Na have weaker wrist pins than TT motors which eventually gave up. You might still have this problem too if they are not replaced with tt pins. Even then I would be a little hesitant and upping the boost much past 10psi, but I think staying at or below 10 would be pretty safe.