12 replies to this topic

[Ol timer]

Maybe a stupid question but when fitting the vacuum adaptor to a 72 mini manifold do I replace the standard carb spacer with the adaptor or is it added as an additional plate, if you know what I mean?

[nicklouse]

I would have drilled the existing one if it was alloy.

 

but to answer your question with another what carb are you fitting?

[Ol timer]

Has a Hs4 already.. Just want to add a vacuum gauge

[Bat]

Hi,

I'd fit it as an addition if the manifold studs are long enough otherwise as a replacement for the current one.

Cheers 

[Swift_General]

Hi,
I'd fit it as an addition if the manifold studs are long enough otherwise as a replacement for the current one.
Cheers

You may run into clearance problems with the jet being moved further back, particularly in a '72 as the crossmember depression is less pronounced, and I'm not sure what having 2 spacers would achieve. You may be able to drill and fit a suitable take off to the existing spacer?

[nicklouse]

 

Hi,
I'd fit it as an addition if the manifold studs are long enough otherwise as a replacement for the current one.
Cheers

You may run into clearance problems with the jet being moved further back, particularly in a '72 as the crossmember depression is less pronounced, and I'm not sure what having 2 spacers would achieve. You may be able to drill and fit a suitable take off to the existing spacer?

 

the problem is many of these things are only thin meaning that you cant use them on their own as linkage parts of the carb can catch on some manifolds and as you say extending the spacer stack can lead to carb clearance issues. why cant they be made standard thickness. 

[timmy850]

I just used the vacuum adapter plate. It worked fine without the standard spacer

[Bat]

 

 

Hi,
I'd fit it as an addition if the manifold studs are long enough otherwise as a replacement for the current one.
Cheers

You may run into clearance problems with the jet being moved further back, particularly in a '72 as the crossmember depression is less pronounced, and I'm not sure what having 2 spacers would achieve. You may be able to drill and fit a suitable take off to the existing spacer?

 

the problem is many of these things are only thin meaning that you cant use them on their own as linkage parts of the carb can catch on some manifolds and as you say extending the spacer stack can lead to carb clearance issues. why cant they be made standard thickness. 

 

It would certainly make it a lot easier!

[Ol timer]

I picked up the vacuum spacer from mini spares recently but I was wondering.. I have the minispares inlet manifold that takes a 5/8 UNF blank plug. Is it possible to run a vacuum line in there Via some sort of adaptor? If so where can I pick one up?

[Bat]

Hi,

Yes you could do it that way.

I can't find an adaptor, but you could drill and tap the blanking plug for a 1/8 hose barb...

Cheers 

[mab01uk]

This is the one for a servo vacuum pipe but too big for a gauge pipe....

SERVO OUTLET ADAPTOR FOR C-AHT770 MANIFOLD

http://minispares.co.../12H1405MS.aspx

Edited by mab01uk, 23 November 2018 - 07:33 PM.

[Bat]

Hi,

In fact if you can find what the thread is you could use the one out of that plastic spacer you bought...

Cheers 

[Ol timer]

Good thinking. Bat..