Which Vacuum Port?

MTCK

Senior Member
Location
Fairbanks AK
Hey guys, I have an HEI unit on my 83 pickup with NO ESC and a vacuum advance and my question is this: on the front of my Edelbrock Performer carb, there are two vacuum ports, one for full manifold vacuum, and one for partial. I've gotten conflicting opinions from local mechanics as to which one my distributor needs.

Also might as well ask a quick carb question. Anyone ever try edelbrock's performer RPM quadrajet? It's gotten great reviews in the 4 wheeling magazines I've seen it tested in. What about their performer q-jet? Thanks all.

Marcus
 

thelawnguy

PlowSite.com Addict
Location
Central CT
You should connect the distributor to the one with no vacuum at idle, the other one is for PCV. Just connect a vacuum gage and you will have your answer.
 
OP
M

MTCK

Senior Member
Location
Fairbanks AK
Thanks, I'll do that. There's actually 3 ports on the front: 1 for PVC, and two different ones for the vacuum advance on the distributor (different types on different vehicles I guess), and comes with a cap to block off the one you don't use.
 

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