Quote:
Originally Posted by VWNate1
Before touching the carby you *must* go back and check and adjust all the tune up stuff ~ points ? .016" or 33° dwell , timing 0° ~ 10° BTDC @ idle and there *must* be no vacuum signal to the dizzy @ idle , if there is , you have the vacuum advance hose on the wrong carby nipple.
|
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.