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Originally Posted by streetfytr68
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.
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All the numbers I left in the car. I know that as WOT we read 11.8 to 12.5 on the A/R meter though the rev range to 6k. On the freeway at cruise we had 14 to 14.5. We also had an issue after a long downhill sweep, I was on it pretty good in 2nd at a high RPM and when the straight away came, the car died. They checked the floats and it's a bit on the low side, but they figured it was not the carb that lead to the stall out. The carb is a holley, but was sent to the carb shop and rebuilt for blower power. The boost reference is below the carb height.