Thanks Lynn for the technical info; I had not seen been to that website before … Racing Beat I am well aware of. Actually I bought one of their double alternator pulleys, which they claim reduces rpm by 20% … other than aluminum instead of steel it is same diameter of existing pulley. I'd like to change it anyway for the small weight gain and what-if due to belt breakage … but I can't get the nut off … any hints?

Jeff

 

A strap wrench around the pulley. And an impact gun.

 

Or, put the whole thing in the freezer overnight, then the strap wrench and the impact gun.

 

Or, drill through the face of the nut with a small diameter bit. Connect the holes with a very small chisel. The nut fails and comes off. If the nut was Locktited, it needs to be heated to kill the Locktite. 

 

Lynn E. Hanover