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houleyh
06-09-2011, 04:40 PM
Hi,

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?

Thanks

TR3driver
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

MGTF1250Dave
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.