Jerry, i read the curve charts. Read them over and over and over so perhaps its more of an understanding issue for me at this point. So for understanding let me ask this. Say the car comes it at 35 degrees all in at 3000 rpm. This car is going to launch at prob 4300 RPM. So at 4300 its still going to be all in at 35 at that RPM. So the cylinders are getting optimum combustion i would think. The timing curves show 'guys uses this bushing and springs, guy gets 'x' degrees in' at 2700 rpm, 3000, what have you depending on combo used. So that's where i get confused maybe....if i'm launching at 4300 RPM at 35 all in, are you saying this is wrong? Or put another way, what would be the big difference being all in at 2700 vs 3000 on my set up? Car's never going to see those RPMS anyhow..? Thanks,