[Shotimes] Effects of Vacuum Leak on A/F Ratio

[Kevin & Cheryl Airth]

Kurt:
 Vacuum is highest when the motor is throttled the most, at idle. At idle
the throttle butterfly is completely closed and the IAB is supplying the
air.
At WOT the vacuum drops to zero because the throttle is now completely open
and provides little to no restriction. You will find that it does drop but
not to zero because in the real world the intake track still provides a
restriction.
 So to answer your question: The vacuum leak should be the worst at idle and
the smallest at WOT.
.
.

> Logic tells me that the vacuum leak would be worse at higher RPM's than
> at lower RPM's?  Is this true?  If it is true, then I wonder what's
> going to happen to my A/F ration and performance once I tighten up the
> leaks??  If not, I may have discovered why I'm running so lean down low.
>
> Am I missing something here?  Any input appreciated.
>
> Kurt