Originally Posted By Cab_Burge
Originally Posted By mickm
So the idle on my car is at 15:1 AFR, and the screws are 2 1/2 - 2 /34 of the way out.
What is wrong with that confused I like to see above 14.5 AFR at idle when warm or hot to help keep the plugs clean up work
My old pump gas Duster 6 pack set up ran at or above 15.2 AFR at idle and low part throttle high manifold vacumme cruise up to 2300 RPM thumbs That rascal flat rocked up boogie


Damn good question! It started with me asking a couple of very experienced engine builders why my car stinks so bad at idle. I thought running rich would make it stink, an they both said, "because it's running too lean."

So, in an attempt to richen it up to see where that would get me, and knowing that for a Holley, almost 3 turns out on the idle screws is not optimal, I was attempting to get the idle screws to a more normal position, to give a range of control over the mixture.