Holley carb. gurus needed!

[Rev]

Originally Posted by ~The Jester~

On MY carb, those screws did squat for air/fuel ratio. That is determined internally, all those screws did was adjust the AMOUNT of air/fuel that got fed through the idle circuit. Yes, I learned that in the book too. heehehe

That's the way it is on my Road Demon also. You can make that air/fuel mixture leaner by opening up the low speed air bleeds slightly. Some carbs have removable air bleeds allowing easy changes. That will require also opening the idle mixture screws a little allowing a little more of that leaned out mixture through the idle circuit. This assumes that the idle air/fuel mixture is a little too rich to begin with (as was my case).

Rev