He said it was a stock setup so what I said was 100 % correct ,
ALWAYS check the basics or you'll wind up chasing your tail .
-Nate
Quote:
Originally Posted by davepl
Not always. If you have a vacuum leak elsewhere or your carb is sufficiently messed up (or a giant cam) you sometimes have to turn the idle screw in so far to get a decent idle speed that you uncover the transfer slots. This is when guys (rightly or wrongly) start drilling holes through throttle blades and so on.
I think as soon as you do that you wind up sending a vacuum signal over the ported line (you're essentially at part throttle, even though you call it idle).
So you're 100% right that there shouldn't be vacuum there at idle, just it's not always caused by being connected to the wrong port.
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