[boygenius]

Originally Posted by Mark the canuck

About 40psi. with hipo engines and turbo's you need more volume not pressure, that said the stock VW unit will work on all but the most extreme flat-4's.

I Understand the fact that volume is more important than pressure. There is nothing stock left in my engine plans. I was thinking of using some used dual carbs as throttle bodies and then buying the cbperformance dual throttle body manifolds with the injector boss's already in them. I have a whole bunch of RX-7 FI parts in my garage that I was planing on using. I can make my own fuel rails and use the mazda fuel pressure regulator witch is set at 41 psi. Turbo engine is a long ways away but I am definatley going to build an EFI system for my car.