I've always tried to keep it at 36 deg all in. Now that you mention it, it might be too much since I am running alum heads. Only way to really see is hooked up to a dyno I suppose. It's always coming in pretty early as well but I've never heard any detonation so I figured it was ok. Might try some stiffer springs. Bump it to around 2800 all in. Probably get some road time this Sunday. They have Indy car testing at Sonoma. Free for spectators. It's about a 45 minute cruise to get there. Sounds like a pretty good tryout.