I have a 02 Z06 with a 76mm turbo. Stock motor, just went with 317s to drop the comp a bit. what power level is the Racetronix 255 kit thats in the car now good for?

 

The number I've read many places on the web is that the 255Lph pumps are good until about 550 rwhp with FI. Maybe 600 in a NA stick car. I would think your turbo setup would be capable of exceeding those numbers, if you have a decent intercooler. I'd call Lonnies (LPA sponsor to the right) and ask him, he is great to talk to, and seems very technically competent. If you need more pump, he can suggest the best way to get there. I believe he is also honest enough that he won't over sell you just to get a sale.

 

You need more pump for sure. Its a small price to pay to save the motor.