Is there a serpentine pulley swap I can do for the either the crank or water pump to slow the revs down? We are running the engine at high revs for a long time in the endurance races.

Thanks for the help

 

try jones racing products

 

pop hoods on cars and trucks in junkyards.. you want a smaller crank and/or larger water pump pulley.. you can generally mix and match, but there are some differences in how far the belt is spaced out from the front of the block from application to application.

 

I have the OLD SLP small crank and huge alternator pulleys. I don't use the alt pully because it will not charge on the street at all, so I just use the crank pulley..
I'm keeping the Alt pulley tho..