TH350 Vacuum pipe size?

[English Impala]

Can anyone tell me the size (Inside Diameter) of the vacuum pipe that runs from a TH350 to the inlet manifold please?

[langysrodshop]

Got one here and its 1/4" Gary

[English Impala]

Thanks Steve. The vacuum pipe take-off on the base of the carb (Edlebrock 600) is 10mm, this is a permenant fitting and can't be unscrewed. Is there an "adaptor" available as I won't be able to stretch a 1/4" pipe onto a 10mm fitting.

[langysrodshop]

Gary you could run 3/8" all the way as it makes no difference, Carb fitting is 3/8" but 10mm is a tad bigger and will fit fine. You can get plastic step downs at Auto factors.



Thanks Steve. The vacuum pipe take-off on the base of the carb (Edlebrock 600) is 10mm, this is a permenant fitting and can't be unscrewed. Is there an "adaptor" available as I won't be able to stretch a 1/4" pipe onto a 10mm fitting.

[English Impala]

Thanks Steve.

Might sound like dumb questions but spare time is short at the minute & the car is a dogs-fart away from an MoT so I'm desperately trying to get as much done during every spare minute as I can!