Idle Mixture screws

[Celeb]

Holley carb (650 double pumper)

Just swapped cams, is it a good idea to now reset/re-adjust my idle mixture screws since Im now obviously going to have different vacuum at idle?

Car runs and drives fine still, just smells odd now. I dont have a good nose for the rich/lean but do have a vacuum gauge and I know how to check it, but was wondering if it was a good idea or not or just leave it alone.

 

[fvike]

You could play around with them, but make a mark so you can set them back to your original position.

To get idle mixture right, a lambda exhaust probe is a great tool.

 

[MustangBill87]

Connect Vacuum guage to port on carb , One side at a time turn idle mix screw in until vacuum pressure drops off then back it out until vac press reaches it highest point do the same thing to the other side after finished back both of them out 1/4 turn and adjust idle and check timing again