Not sure about power people make, but mine made 145rwhp on the factory 8psi. I made a custom pulley up to go on the supercharger, and this bought boost upto 15/16psi. Never made it back onto the dyno, but it felt stronger.
The new pulley meant the removal of the supercharger clutch as well. Ran fine, and all on standard computer. Was great to have 10psi as soon as you crack the throttle open.
I will find a pic of the pulley I made and post it up. I made a couple of them, and sold one of them to someone over in WA.
One thing to note if boosting, is the need for an intercooler. Not the easiest to setup on a GZE.
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