What are the holes for?

[mustube]

My grandpa just bought a 71 Mustang which had the air cleaner from a 250 the original engine in the trunk and besides the snorkel there are two holes in the base of the air cleaner. What are these holes for? Thanks

 

[The Plankster Prankster]

i would figure they'd be for some sort of vacuum plumbing, it seems that many air cleaners have hoses running all over teh air cleaner. as for what exactly it is, beats me!

 

[fordconvert]

I would imagine the intake for the PCV system would be one, there would have been a hose going to the oil filler cap. The other would have maybe been part of the smog system. Why those things had to go into the air cleaner who knows.

 

[ludwig]

Probably a vacuum pull off for the air flap in the snorkle that metered the flow of cold air until it warmed up, if there is a re-director from some kind of stove over the manifold.

 

[simon]

Probably a vacuum pull off for the air flap in the snorkle that metered the flow of cold air until it warmed up

I would imagine the intake for the PCV system would be one, there would have been a hose going to the oil filler cap.

both candidates have scored 100 points.

flapper door was controlled via a thermal sensor which was hooked up to (you guessed it) manifold vacuum.
Amazing how much stuff was metered by manifold vacuum.
before electronics conquered everything, they seem to have hooked up every little gewgaw with manifold vacuum.

things got really weird from the mid-seventies up, a snake's nest is nothing compared to a fully smogged-out 302.

 

[ludwig]

Woah!! I'll take vacuum powered accessories for $900 Alex.

It kept the cab fee of cigarette smoke.


Da da, da da, da da, dat - da da da ....

 

[mustube]

Well I guess I can fill one of the holes and remove the flap in the snorkel and use the snorkel for cold air intake?

 

[Geezer 300]

I got a kick out of the vacuum operated wipers

 

[ludwig]

Yeah, slow when you need them most, like when you are creeping through a downpour; fast when it doesn't matter, like at high speed on a flat road.