Mountain Magic Sports

I find that most turbo clutching is way off. 

I like to load a turbo but you need to let it spool first. That is why most put a 36/46 and a high engagement spring thus you get that clunk or harsh engagement.
Even the turbo companies clutches are different for example:

BD Uses light tipped weights like 80 g cat weight, high engagement spring and a 36/46 helix.

OVS uses heavy tips, high engagement spring a multi angle torsion set up.

I like to use a turbo weight, high engagement spring with a straight 44 or 46 helix.

The key is the weights. Giving you a smoother engagement by letting the turbo spool then loads the crap out of the sled.  Result is 'pull your arms' off feeling. Clutches work together and turbo is loaded getting maximum power which is good for boondocking or hill climbing.

Hope this helps.