I have a srt6 I want to add a 185 pulley I now have the 65 mm pulley with dual intake and tune do I need the manifolds and fuel mods for the 185 to work

 

You're definitely going to need fuel mods at bare minimal, bigger injectors, bigger fuel pump like the SL55 and a tune. You're going to a stack application which not to many people run for fear of blowing the motor up. Ironically these motors used are fairly cheap if that were to happen. I'd also do the upgraded manifolds to help it breathe, no point in spinning the blower faster if you cant get the air through the engine any faster.

 

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

 

rDylanHunt is correct, you will be purchasing a new motor with that setup..The best stacked setup is a 70mm SC pulley and 181mm crank pulley, which is about as far as you can go without over spinning the SC bearings. You can turn the stock SC pulley to 70mm without spending a fortune and have good reliability. You will need a real upgrade to your fuel supply, I have the pump upgrade, 550cc injectors, regulator, good luck.