vacuum pump system.

[Ohio Tom (DdK)]

Well I finished installing my new vacuum pump system on my 2276cc N/A drag motor.
Everything seems fine so far.
I have one question for those who run these systems.

I was talking to the local Race shop (that does primarily V8 stuff) about the vacuum system. These guys know their stuff and build lots of drag, circle track, offshore boat motors.
They mentioned that I may have to up a size or 2 on jetting. For some reason, running a vac system makes the motor run a little bit leaner.

Anyone ever had this issue? Should I go up a size just to be safe before taking it to the track?

[flat top]

Tom  I talk to a friend and he said if you do not have any problem with your rings (being weak) a  vacum pump should not affect your carb Jetting....

Wayne