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Old 01-19-2013, 06:15 PM
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Just don't get too carried away on trying to get it tuned too sharpe. ( best power) You need some in cylinder cooling (extra fuel) to keep it alive under boost. You don;t want to be on the edge. A bit rich er Under boost/throttle is fine. You can drill/hone the jet hole in the sec metering plates to fatten that side up if needed.

I'd use a minimum of a holley #21 sec metering plate in the 600VS carbs. These are found in the 3310 VS 750 holley carb.

Was it pig rich with #72 pri jets in it.? ( I assume that you had the power valve in.) Starting rich is the safe way to tune it in.

If its tuned on the edge with a #65 you may want to bump up to a #67ish pri jet. A bit rich is best.
The secondary metering plate matters. Its not that hard to modify/convert to replaceable holley jets.

How much vacuum did the wide open throttle carbs pull at WOT? max rpm. What is the blower drive ratio?
Indicated boost @WOT.
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