How To Adjust The Secondary Speed Screw On Holley Carbs

12/02/2009
10 min read

How To Adjust The Secondary Speed Screw On Holley Carbs

12/02/2009
10 min read

How to properly adjust the secondary speed screw on Holley carbs. This procedure is only used on engines with large duration camshaft that have very low vacuum at idle.

author

Bill Tichenor
358 Posts