C crash Active Member Joined Aug 18, 2010 Messages 31 Reaction score 0 Location virginia Apr 20, 2011 #1 on a holley squarebore should the secondary butterflies be closed all the way or should it be between the idle and the primary ports in the ventury
on a holley squarebore should the secondary butterflies be closed all the way or should it be between the idle and the primary ports in the ventury
