mk1-forum.net

Has anyone on here installed a vacuum gauge on a twin carb inlet manifold? How did you do it? Pictures?

Is this worth pursuing?

If I manufactured a short T piece that fits into the brake servo tube close to the inlet and connect the vac line to that? Sound reasonable? I've never fitted one of these before so apologies for stupid ideas

dont forget to fit, a small jet, into the hose, so you dont break the gauge.

You mean the part of the T that connects to the vacuum gauge tube should be of the right (small) diameter?

yes the small hose, that goes to the gauge, should have a very small jet = 0.5 or 1mm size(app).

Got it! The gauge comes with its own original tube, so I'll ensure the T piece fitting is the right size to connect the original tube.

Thanks!

Abri,
You will know everything about gauges soon. The installation of a snubber or restrictor is a great idea as suggested above.It will stop the pulsing that occurs on a vacuum or low pressure pressure gauge where volume changes rapidly. In this case you have Control Instruments in South Africa who manufacture ( or did ) industrial pressure gauges where snubbers are used as a matter of course.
On the issue of connection unlike temperature, pressure/ vacuum is constant so you can connect anywhere within the system you are measuring. I look forward to your next question on gauges. You can read "The care of instruments" put out by Smiths in the 60's/70's complete with Brockbank Cartoons. Mark may have a copy of it on the site somewhere.