Hi
I have a 2005 super v8 that is in very good condition,
So far I have changed the cats to 200cels, a caldoofy intake and a quaife lsd.
I want to get more power and are looking into a 6% pulley upgrade
What is the best supplier for the pulley, I see that some are providing both steel and alloy pulleys?
Is it reccomended to change the pulley, I know that it would not increase the hp a lot, but I hope that it will compliment the cat upgrade and give me some more mid range power
is it anything else I can do to get some more power out of this? I will upgrade the intercooler coolant pump as well

 

As for material choice, aluminium has a tendency to slip, thus stainless steel is better. My XJR has similar enhancements to those installed and planned but using a 10% pulley which requires machining of the supercharger snout to fit. This was supplied by Powerhouse Automotive https://powerhouse.uk , who also carried out the machining with the supercharger in situ. I additionally have an X pipe and the ECU is optimised to exploit the changes and the use of 99 octane fuel. After more than four years and 25+,000 miles, none of this has caused any problems, and I remain ecstatic with the performance. You may not get quite the same results with a pre 2006 car without VVT or (I believe) a programmable ECU.

 

the black steel one on US ebay

get a tune though otherwise the pulley is a waste of time