Carb/timing procedure

MomsDuster said

Let me preface this with, I DO NOT have any problems or issues with my car at this point. This is just a general question on what your process is.

When using manifold vacuum for vacuum advance, do you adjust your carb/carbs idle mixture and idle speed with it connected or disconnected?
If you adjust with it disconnected, do you just accept where the idle speed and idle mixture end up when you reconnect the vacuum advance?

And go……

:popcorn:

Click to expand...

Typically Mopar uses a ported vacuum there's no signal to the vacuum advance canister therefore the timing stays stable at whatever it was initially set to until the engine is revved up to RPM and the advanced weights extends advancing the timing plate.
In that example set the idle mix with it connected or not...because only the full advance timing will be effected by it and that's at rpm, not idle*
What you're asking kind of answers itself, and the way that you worded it ..if you know that setting your idle before hooking up manifold vacuum 'which is constant not ported' will lead to idle speed changes obviously because you do seem to understand that hooking up that canister to manifold vacuum will immediately Advance the timing therefore changing the mixture required... ta da...there's your answer. MANIFOLD VAC- NO YOU DO NOT SET IDLE MIX WITH VAC ADV DISCONNECTED WHEN USING MANIFOLD VAC...

PORTED VAC-YOU CANSET YOUR IDLE MIX WITH OR WITHOUT THE VAC ADV CONECTED WHEN USING PORTED VAC SOURCE BECAUSE THERES NO SIGNAL TILL THE THROTTLE PLATES EXPOSE THE ORIFACE AND ACTIVATE IT.