Hello Peter,

if I am understanding what you want to do is to stack a 65mm SC pulley with a 185MM crank pulley? That would overspeed the supercharger far beyond it's abilities to the point of both making the extra boost useless from the intense heat generated and the inefficiences of the supercharger using so much power for so little gain. The only stacked variants that keep the supercharger happy is a 65MM SC pulley and the 178MM crank pulley to stay close to what the supercharger limits are.

SRT-6.com - Chrysler Crossfire SRT-6

DylanHunt