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TR2/3/3A Vacuum connection at Carb

TR3driver

Great Pumpkin - R.I.P
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Just to add a challenge, the adapters have been retooled to metric threads on each end, but Moss only sell compression fittings with Imperial threads. More thought being applied.

That's absurd; they can't make a change like that and claim it fits. I'd return it as "not suitable for advertised purpose". I'll bet the one TRF sells will fit, and they even charge less for it.

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mastaphixa

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Any thoughts on changing the position of the vacuum tap from the front carb to the crossover tube?
 

TR3driver

Great Pumpkin - R.I.P
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Any thoughts on changing the position of the vacuum tap from the front carb to the crossover tube?

Seems like a bad idea to me. The port on the front carb is 'timed' to not produce vacuum when the throttle is closed, so you don't get advance at idle. Gonna be hard to reproduce that going from the crossover tube.
 
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D

Dr_Mike

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1. I phoned The Roadster Factory but they had no idea what thread they had on the parts so I gave up that idea in favour of gluing the male fitting into the original hole.

2 It was suggested locally to move the carb connection down stream, but as Randall notes the result would be unpredictable.

3 The other local suggestion was to cut the vacuum pipe and join the ends with push-on hose, as some other makes have done. This would enable me to remove the carbs without destroying anything else. I hope.

Meanwhile work has stopped due to cold weather! I am off south to warm up for a week.
 
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