Welcome to our Site for MG, Triumph and Austin-Healey Car Information.
Triumph TR6 - Quick Carb Question
I have the twin ZS carbs that came stock with my 1970 TR6. A vacuum advance line runs from the distributor to an adaptor on the top of the front carburetor. A second vacuum line runs from the distributor to the bottom of the rear carburetor. There is no adaptor fitted to the top of the rear carb, but there is a threaded hole where one could be. Should that hole be plugged? Thanx DS |
Dennis Silance |
Does it suck air? |
DON KELLY |
Don, I don't believe it would, as there dosen't seem to be a air hole at the bottom (comparing it too front carb). I do not have the car running at this time. A few more items left to attend before the big "turn of the key". It's been a two and a half year tear down and restore campaign, but we're getting close. I re-did these carbs so long ago and don't recall questioning this back then. Looking at all my "before" camera shots, I can't find any of that particular carb at the right angle to see if there was something i.e., plug, etc. in that hole. I guess it wouldn't need anything if it's not open to the intake. It just seemed odd though.... DS ![]() |
Dennis Silance |
Dennis The factory changed the configuration almost daily. My '71 only has the vac line to the rear carb on the bottom...nothing on the front carb. My rear carb has a brass plug threaded into the hole you refer to in the top of rear carb. I would make sure it is plugged up. Rick |
Rick Crawford |
Earlier cars has 2 do-hickys on the dizzy. 1 was port vacuum the other was the other vacuum. This might be complete BS but I am trying to recollect old conversations. |
DON KELLY |
Yes that hole on top of the rear carb needs to be plugged or you will have a vacuum leak which in turn will make the dual carb set-up more difficult to synchronize. As odd as it may seem, it is the correct hook-up. For some tr6 people, the confusing part to your question is that most distributors have only a vacuum retard. Your distributor has the rare vacuum advance and retard which was available on the tr250's and early tr6'. |
benji |
This thread was discussed between 08/09/2007 and 18/09/2007
Triumph TR6 index