Plumbing in a vacuum gauge............

[stiller_uk]

........Where do i take the vacuum feed from?

The back of the inlet manifold

OR

the carb where it also goes to the vacuum advance on the dizzy?

The car is a 1.4 with a weber 32/34.

Thanks

Graham

[Snowface]

vacuum advance on the distributor goes to the back of the weber 32/34.

[mikeoxford]

vacuum advance on the distributor goes to the back of the weber 32/34.
went to the frotn on mine.......

[stiller_uk]

I'll have a go from both, see what gives the best reading.

[snapper]

err, isn't the connector on the back of the weber for connecting to a plenum, airbox flap or something?

[stiller_uk]

I've done the same as mikeoxford.

If u take it from the front there is less vacuum as u open the throttle, which gives the correct reading on the gauge.

If u take it from the back there is more vacuum as u open the throttle, which is wot u want for the timing advance i.e. more throttle>more vacuum>more advanced timing as the engine revs harder.

[Snowface]

really? I read through the instructions that came with my 32/34 and it states the vacuum advance goes to the back.

it says put it on the back for 1.3/1.4 liter models but,

put it on the front one 'For all models with electronic control vacuum advance'.

Now i'm sure mine isn't electronic so i put it on the back.

I showed the tuning mechanic when i got the carb setup and he said that was right for my car.

[stiller_uk]

Yeah the vacuum advance does go on the bk.

[snapper]

you lot sure on this? i'm going to give it a try now.

at any rate, i've learnt something from this thread :)

[stiller_uk]

you lot sure on this? i'm going to give it a try now.

at any rate, i've learnt something from this thread :)

I take it ur running ur vacuum advance from the front of the carb then?!

[mikeoxford]

mine was always connected to the front (back in the day).......