FAQ |
Members List |
Social Groups |
Calendar |
Search |
Today's Posts |
#1
|
||||
|
||||
Purpose of Vacuum Can?
Did all 1970 A-bodies have a vacuum can on the firewall?
What was the purpose? Do I need it for any reason? I'm trying to get car running and am revisiting vacuum connections. A vacuum reservoir is not on my car and I don't know if it ever had one. Car has AC and TH350. I added power brakes and replaced 2bbl with QJ. I just got QJ idling (tnx to shaker455) and plan to start with ported vacuum. I have a tree on back of QJ base that accepts brake booster, transmission, and vent controls. QJ is Buick so vacuum ports may be different than those on a Pontiac carb. I plan to connect distributor vacuum unit directly to port on front of QJ. I am not using the TCS solenoid. Before I try to adjust idle speed or measure mechanical advance curve, I want to make sure a vacuum can wasn't needed. I have not yet measured idle vacuum, but expect it capable of over 15" with stock 350 and Summit 2800 cam. |
#2
|
|||
|
|||
The can is not needed for what your wanting to do.
The reserve cannister is to keep heat/ac/dash vents working properly when the engine is under load (low vacuum). Clay |
The Following User Says Thank You to "QUICK-SILVER" For This Useful Post: | ||
#3
|
||||
|
||||
Ahhh!
Thank you |
Reply |
|
|