Little vacuum connection on M102 manifold - what's it for?
 

G'day Folks,

I've asked elsewhere but have had no serious reactions!

Does anyone know about this connection on a M102 intake manifold?

http://www.peachparts.com/shopforum/...-manifold1.jpg

It sits at the back of the fuel distributor thingy (this is missing in the picture - in case that's not clear - and yeah I know the start valve is the wrong way round but I've already fixed that!)

It came with this bit of fabric covered pipe with a screw stuck in the end of it

http://www.peachparts.com/shopforum/...-manifold2.jpg

Could this be a vacuum connection for an automatic transmission (I have manual shifting gearbox so not needed)?

Thanking you all in advance - need to know - must know

Whoap! This thread from the UK seems to confirm that it is for the automatic.

Harsh auto shift - vacuum issue?

Did you get replies like....

What's it for?

Vacuum.

lol had you not said "no serious reactions" I would have just quoted you and posted "vacuum"

He who shall not be named did make a comment like that but he's just redeemed himself...

I said it was part of the in-car interior vacuuming system -- just hook up a hose & clean the interior!

The vacuuming hose is NLA, of course.

Oh I'm sure we could jimmy up something! So how does this work, I just rev the engine higher and I get more powahh?

RED LINE THIS THING ALREADY!

As I explained earlier there is really no need for a vacuum cleaner in my car - it is always spotlessly clean - just like the group captain's daughter (who always kept her cockpit clean)

On my 2.6 there are 2, one for the transmission (automatic) and one for the economy gauge on the instrument cluster. The tempmatic climate control also sources vacuum from one of the two. When I added adjustable headlight beam functionality, I tapped into the same vacuum source.

Thanks Patrick total confirmation - car vacuuming attachment myth busted.

LOL. Actually, you'd want to idle it for the maximum amount of vacuum, and then do an Italian job no it afterward to flush out all the junk that you poured into the engine.
Shhhh! I was about to start selling replacement vacuuming hoses... there goes my $$$ for 7.5 mm elements :P.

SHH how am I supposed to sell engines, if you tell people not to red line the hell out of them?!

This ain't no diesel mush (more's the pity). You get lower air pressure with more air / faster air flowing though the inlet manifold so you do need high RPMs. And even a piston vacuum pump to a point "makes more vacuum" as it pumps faster - the reason why you get reduced vacuum at higher engine speeds is due to a little valve.

Hmm, that's interesting -- but makes sense.
REDLINE THOSE PUPPIES, FOLKS.