Re: GAV Question
The GAV adjustment is affected by the size of the cap jet and the comp jet. When the GAV is closed fuel that is emitted by the cap jet is determined by the size of the comp jet. When you crack the GAV open you are porting fuel around the comp jet so that the cap jet will emit more fuel. If the comp jet has been drilled out to the same size as the cap jet the GAV does not have any control.
Each car is going to be different depending on the sizing of the two jets. If the two jets are within spec (most are not) the GAV adjustment should be between 1\4 and 1\2 a turn cracked open for normal driving. The jets in my Vic have been properly re-sized and I run with the GAV cracked open 1\2 turn for normal driving.
When climbing a steep mountain grade I open the GAV more and back off on the spark advance a little.
Tom Endy
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