Moved— BOOST Mountain clutching discussion
- Thread starter damx
- Start date
Always plans for clutching…..
The P-22 puts a new twist on things. If it was a P-85, it would be TRS clutching. I’ve run Tony’s clutching on all my sleds since 2011.
Might start with something as simple as a Gates 47R or 47R 26’ belt. The 47R grips so much harder it may deal with the full boost— off throttle— full boost situations. I think the hardness of the 1216 lets the belt slip a little in that situation. Might go as far as putting a P-85 on there and running TRS clutching.
Trying to get a full mental picture, and seat of the pants data sets as possible, also want the sled out of break in mode before I really get after it.
I’m ok with the 8500rpm— it’s the mid profile response (too light?) I’m curious about. Not sure if it’s belt grip or too light a weight.
Why do so many guys think turbos need to be geared higher than N/A sleds? I constantly hear this from my turbo customers. They add a turbo and then over-rev so they want to gear up. I bang my head every time because the turbo needs more clutch weight which kills the bottom end as the motor has to try and pull these weights before the boost is built. Just try adding way too much weight to a N/A sled and see what the bottom end is like. Ideal clutching will be light as a N/A at the bottom end but increase with boost/RPM. The weight profile is very important along with helix and springs selection. Sleds that have a poor bottom end or "lag" can benefit from lower gearing as you are simply loading the motor less off the line. When I got my 21 Khaos the first thing I did was pull off the QD2 and sold it, replaced it with a TKI to gear down, and this was a N/A sled. You don't need 80 MPH in the trees.
Interesting weight. Big slug of weight in the mid-profile area.
