View Single Post
Old 05-30-2014, 09:28 AM   #8
Lee H
Registered User
 
Lee H's Avatar
 
Join Date: Jun 2010
Location: Upland Ca
Posts: 4,150
Re: Vacume for HEI distributor

Quote:
Originally Posted by cherokeejohn View Post
I reused the original line from the front of the carb, but it is a constant vac line. I need a vac line that only has vacume when the RPMs increase due to the vacume advance on the HEI "so I'm told".
That is called manifold vacuum and is just fine if you truck is running good. You can try the other, called ported vacuum if you like. Most Chevy motors run better on manifold, constant, vacuum but some do like ported.
__________________
1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner.

1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components.

My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703
Lee H is offline   Reply With Quote