calling on all demon experts
Thread Starter
Drifting
Joined: Apr 2006
Posts: 1,911
Likes: 2
From: gold coast queensland
calling on all demon experts
on my demon 750 double pump there are the 2 small vacum ports on the right hand side .i have heard that one is a constant vacum and the other is only at certain times. if this is the case im guessing it is important which one goes to the kickdown and which one goes to the vacum advance on the dizzy. is this true or are they both constant and it doesnt matter.
Drifting
Joined: Jul 2002
Posts: 1,254
Likes: 1
From: Edinburgh
The one on the outside is ported or timed vacuum, the inner one is direct manifold vacuum this is the one you should use for your vacuum advance on the dizzy.
Last edited by Graemeinvette; Jun 12, 2009 at 03:19 AM.
Le Mans Master
Joined: Jun 2008
Posts: 5,284
Likes: 235
From: Rockledge FL
read up on carbs and timing.
some people like the constant vacuum to the distributer some like the other.
the transmission needs constant but normally that comes from a fitting in the back of the manifold itself not the carb.
worse case use a T fitting on the constant vacuum for both.
some people like the constant vacuum to the distributer some like the other.
the transmission needs constant but normally that comes from a fitting in the back of the manifold itself not the carb.
worse case use a T fitting on the constant vacuum for both.
