The mixer builder is XR9UTE (Pete).
The IMPCO mixer stock flows 325 cfm at 28" h20
It can be ported to flow 425cfm if you spend the time on it.
Thats a 30% increase BTW. Nothing to sneeze at.
GRA dont flow more and cost heaps more (my 0.02)
T3 man. Can you tell me more about your gas injection please.
email me with details if you want.
I have been looking to get into vapour injection with a motec controller for my engine (and a few others here in SA) and would like to know what you have there.