Quote:
Originally Posted by Jeff Stout
I measured the diameter of butterflys on both sides and it worked out 20% primary 80% secondary. May not be exact science IDK
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The would be close if you were comparing primary and secondary sides that had the same fuel metering structure (like a typical Holley 4150/4160 style carb).
Measuring throttle bores or primary/secondary air flow and extrapolating that to fuel flow doesn't take into consideration how a QJet triple venturi primaries meters fuel as compared to the the non-booster secondary side that has a simple discharge tube. On the primary side, even the idle circuit contributes to fuel flow as the primaries open.
As quirky as they are, I love 'em.
-Al