My 2018 Ltx DX all stock, with STM 60y weights, Dalton black red spring and a 33/35 helix set at 3 and 3 will run 115 mph on the speedo in ideal conditions at 9100 rpm’s. Has anyone tried a 39/35 helix, would it get me anymore mid and top end, and what setting should l use,3and3 or 6 and 1. Any insight would greatly be appreciated. Thank you.