Old 07-08-2020, 12:37 AM
topfuel67 topfuel67 is offline
Senior Member
Join Date: Feb 2015
Posts: 172
Default Distributor vacuum source

I have checked in my 66 shop manual and cannot find the correct location for the vacuum advance line for the tripower distributor. I did a search here and have been reading about the difference between port and manifold vacuum. This has not helped me find the correct location, but that may be irrelevant since my car is a wv 66 smog car. I have put it back together without any of the smog equipment. So I don't know if it really matters if I plumb it correct for a non AIR car.
My center carb has the rare CA AIR fuel bowl. This fuel bowl has a port right above the base that isn't there on the 7031535 bowls. I thought about using that, but will have an odd vacuum line not correct on usual 66 tripowers.
Anyways, please advise where the correct location is, as I am trying to make it look factory correct/pretty for a non AIR car.
Attached Thumbnails
Click image for larger version

Name:	20200608_123906.jpg
Views:	40
Size:	59.2 KB
ID:	544514  

Old 07-08-2020, 04:26 PM
Kenth's Avatar
Kenth Kenth is offline
Ultimate Warrior
Join Date: Feb 2003
Location: The Kingdom of Sweden
Posts: 4,469

Non-A.I.R 1966 Tripower uses a threaded 1/8" NPT fitting at rear of center carb base for full manifold vacuum to the vacuum advance.
Also, you will need an 1/8" NPT plug for the ported vacuum source on float bowl.

1966 GTO TriPower
1970 GTO TheJudge
Old 07-08-2020, 07:00 PM
topfuel67 topfuel67 is offline
Senior Member
Join Date: Feb 2015
Posts: 172

I got a T fitting for the center carb port. I had the dash pot for the center carb plugged in there. I also plugged the other port.
Thank you for the reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -4. The time now is 05:17 AM.


About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.


Cold Case Radiators

Cold Case Radiators is a Max Performance company that produces high end aluminum performance radiators at a price point that won't break the bank. Polished and stamped tanks. 2 rows of 1" tubes. Lifetime Warranty.


GTOG8TA.com is a Max Performance company that manufacturers parts for the 04-06 GTO, 08-09 G8, and 93-02 Firebird/Trans Am platforms.

Copyright © 2017