Gold Lifetime Member
Join Date: Jan 2005
Location: 2 Dog Town in West Texas
Re: Power Valve - correct size?
I would guess you have an 8.5 or 10" pv in there now. PV is needed when you are demanding more fuel or power and does just that, opens up at a lower vac setting, its basically fuel transition between the idle circuits and main circuits. You could pull off front bowls and remove metering block to check. Be sure to have a set of gaskets , just in case you tear the orginals. You may luck out and you carb may have those non-stick gaskets.
Rule of thumb is generally to run a PV with a setting, 2"hg lower than idle. Sounds like you have a stock set up so you are a long way from the PV opening point.
TC # 349
Zdld17:69 Z/RS,306, NOR141111, 9N554XXX, 12A, X3G, 59/59,723, AFR 195,CCC282/290HR, TKO 600, BU1122B1E Owner since Dec 1968
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