Helix angle change and effect on RPM

[snowdust]

When you are clutching a sled and changing helix's... What can you expect for RPM change based on degrees changed?

For example... Let's say the shift out is good and I am using the stock 51/43 helix. If I changed to a 51/40 how much would I expect RPM's to lower on the big end if everything else was the same? I realize there is not an exact answer.. I am just looking for a general idea. I have always messed with the weights, but not as much with the Helix side of things.

 

[kviper]

Going to less cam on the big end will increase RPM. Lots of variables but I would guess 2-300 RPM ? Maybe not that much? Remember cam angles can vary from vender to vender! Making a small change I would get the cam from the same vender. Are you running out of tunability or balance with the weight's?

 

[STAIN]

Generally 1 degree was 200 RPM, but each sled may be different. Only way to be sure is try it.

 

[snowdust]

Thanks guys!