Hi Ivan,
Well, The q-jet will work good when you are on the small primarys. Unfortunately, the secondarys will never open fully as you just don't have enough air flow on a low revving inline six to open them. That is why some think they are working well on their sixes. Another way of saying this is: a q-jet is just too big. They are either 750 or 850 cfm and that's just to much.
(I can hear the protests now )
Jim
