03-19-2005, 08:40 PM
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CC Member
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Join Date: Jun 2001
Location: Washington DC Metro (Virginia),
VA
Cobra Make, Engine: Classic Roadsters, Tweaked 351W, T-5Z, CRII Tech Support Team.
Posts: 1,895
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Not Ranked
Dual PV's aren't just for race cars. Street carbs use them too. Spread bores (for you GM guys) had front and rear PV's on DP carbs.
PV on the secondaries help part throttle fuel metering depending on engine demand as determined by engine vacuum.
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