New Holley Tri-Power Tuning

[32 deuce]

Have a new Holley Tri-Power setup on 357 SBC, with 284 Comp Cam. To get it to idle about 900 RPM, it's off of the idle circuit. So wondering do I drill center carb butterflies, or adjust idle with all three carbs, as they all have idle circuits and idle mixture screws?

[Gaz64]

Yes, adjust the front & back carbs, open a fraction to allow the center carb to come back to where you want.
The engine idles on all three, so all six barrels should be flowing some air, and idle fuel. Gary

[32 deuce]

OK thanks Gary. I'll give it a try when I've done my 20 day shift.