If you stick with the Racesaver model. You have crank weight, untouched heads with large combustion chambers, flat top pistons, flat tappet cam with not much lift, weak valve springs. then you also have tech people checking valve lift and spring tension after race. In our area they also tech the motor while apart and then seal.
I think it would be hard to get 600 from that. Now on the Midwest side-- They use steel heads with smaller combustion chambers, bigger intake valves, better valve springs. All the ingredients you need to make the little thing breathe better. Now yo are talking about the possiblity of getting to 600.
Not saying either one is better, but it is 2 distinctly different 305 classses out there. Then you have Knoxville which allows even more.
|