Sorry about this question, I dont have much luck with the search's! Turk's Viper setup with green spring and helix, what twist for the spring?
Thanks, Dave
Thanks, Dave
yamaholic22
Active member
Try 60*, which is 3-3, if it doesn't backshift quick enough for you go to 70* which is 6-1
Thanks, I do want a good back shift, if at 70*, what drawbacks would there be through the shift-out?
yamaholic22
Active member
a clutching system is most efficient with the least amount of secondary twist that still controls overshift and has acceptable backshift. You don't want the clutching system upshifting so fast that it overloads the engine, pulling it down below its peak where it takes a long time to recover, that is overshift. Backshift is when the secondary sheaves close tighter, forcing the belt to go a higher position in the secondary, lower position in the primary, or to a lower ratio (downshifting in essence).