[Steve Chryssos]

So it's getting air. Was it getting fuel? Were you monitoring A/F ratio? BSFC's? Post some numbers. Did you purchase a specialized blow thru carb?

Blow thru carb engines are among some of the hardest to tune as they violate the very principle that carburetors are based on: Signal. By signal, the engine sucks or pulls on the carburetor to draw air and fuel during the intake stroke. With a blow thru system, you are pushing instead of pulling. Be patient. Collect and analyze data on available air and fuel across the pull. Contact ProCharger and your custom carb builder to analyze the data. If you don't have a custom carb builder, get one. And get to know him on a first name basis.