View Full Version : TR2/3/3A TR3A Vaccum line for Distributor

06-09-2011, 04:40 PM

I am trying to connect a copper line from the bottom of the front carb. What is the thread size? 1/8 BSPP?

Where can I get such a connector?


06-09-2011, 05:35 PM
I don't know the thread size offhand, but ISTR it was a Whitworth thread.

Both Moss & TRF have the union listed as available, although you should probably be sitting down when you see the price. Moss 371-100, TRF SUAUC4490

06-09-2011, 08:54 PM
Aloha Yvan,

I recently fabricated a vacuum line for my TR3. I used 1/8 inch compression nuts and olives and 1/8 inch copper tubing. The thread size for the compression nut is 5/16 - 24 UNF. The nuts went on the carburetor and vacuum advance without a problem.