Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Hey Guest! British Car Forum has been supporting enthusiasts for over 25 years by providing a great place to share our love for British cars. You can support our efforts by upgrading your membership for less than the dues of most car clubs. There are some perks with a member upgrade!
**Upgrade Now** (PS: Upgraded members don't see this banner, nor will you see the Google ads that appear on the site.)
Guys, I found my vacuum advance hose off and want to make sure I connect it properly--does it to to the hose comming out of the bottom of the carb closest to the firewall? By the way, the PO has this hose (tube) plugged...
Pretty sure its vacuum retard, and that, as tinman already stated, should go to the front of the carburetor. Not real sure why the hole would be plugged, unless you have electronic ignition.
I don't believe a 72 TR6 had vacuum advance; only vacuum retard. The retard line should go from the distributor to the Thermal Vacuum Switch in the top radiator hose; and then from there to the fitting underneath the rear carb.
Yep, that's the vacuum retard; not totally necessary but doesn't hurt anything either.
Mines a 73 TR6 and the vacuum source is on the bottom of the rear carb, so maybe they changed the location or it's one of those random Triumph things.
Just a ? Does the vacuum source know whether it's for advance or retard? Seems to me where the vacuum line attaches to the dizzy is the important question. Or did I miss something.
Just a ? Does the vacuum source know whether it's for advance or retard? Seems to me where the vacuum line attaches to the dizzy is the important question. Or did I miss something.
Vacuum levels vary under different circumstances at different locations so the attachment point will be measureing something slightly different and giving a different signal to the advance/retard.
Yup. It's "ported" vacuum, meaning it's blocked off for certain throttle positions. An advance port is blocked at idle (so no advance at idle); while a retard port is unblocked only at idle (so vacuum retard only at idle).
Mixing them up can cause a VERY poor running engine.
Pete, you were correct. I adjusted the points relative to the rotation the vacuum effects and presto! Running great with the hose connected! Thank you all once again.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Hey Guest!
