Hi everyone what I'm wondering is if anyone knows what a good starting point for primary clutch spring and 2ndary clutch spring/helix on my 1998 Skidoo Summit 670 with single fatty pipe and aerocharger? I ride at 1300 feet elevation all the time with a 136×2 track with no picks. Basically if anyone could even tell me what type of changes have to take place with clutching , gearing, track etc. with any sled from a factory setup to a turbo setup would help me greatly. Thanks