Hi,

On my AMC 304 I've just changed a very clogged, need to be rebuilt mc2100 by an Autolite 2100 taken out of a 196? Ford Mustang. There's not many differences between my old mc2100 and the one I had from the mustang except the choke version and the accelerator cable lever. All of this was taken from my first carb and used on the Autolite. My question is, if the autolite doesn't have a PCV valve inlet port, can I just put a breather at the end of the PCV valve outlet? Will it affect the engine? Also, I live in Canada and my Jeep (1979 CJ7) doesn't have to pass any smog tests.

Any help on that would be appreciated.

Frank

Hi,
My question is, if the autolite doesn't have a PCV valve inlet port, can I just put a breather at the end of the PCV valve outlet? Will it affect the engine? Also, I live in Canada and my Jeep (1979 CJ7) doesn't have to pass any smog tests.
Frank
You really need a vacuum source to vacate gasses from the crankcase. Sure, pressure will relieve on its own, but it wont be very efficient for getting rid of the corrosive fumes which build up in the engine. That's why there is a vacuum source and a fresh air source.
I find it hared to believe that carb doesnt have a vacuum source for PCV:confused: Perhaps it used a vacuum source from an adapter plate.

You really need a vacuum source to vacate gasses from the crankcase. Sure, pressure will relieve on its own, but it wont be very efficient for getting rid of the corrosive fumes which build up in the engine. That's why there is a vacuum source and a fresh air source.
I find it hared to believe that carb doesnt have a vacuum source for PCV:confused: Perhaps it used a vacuum source from an adapter plate.

That's probably it, I read about a Ford adapter plate for these carburetors. I should probably find one. Could I modify my air cleaner bowl to accomodate a source of vacuum for the PCV valve or is it not enough?

Frank

Well I got this on the net:

Ford Base plate – There is a cast aluminum base plate with a vacuum operated EGR assembly on it. These are common in the junkyards. As the oem gasket covers all of the bottom of the carburetor except the venturi openings I did not use the Ford base plate. I picked one up from the junkyard just in case. Using it will require lengthening the throttle linkage rod to compensate for its thickness.

Could the PCV valve uses the same vacuum from the EGR assembly?

Frank

I have the Ford Mustang plate with the PVC port that your talking about. PM me if you want it. I'll let it go for cheap. Send E-mail address and I'll send a photo.

Two things to check before you do this ......
1.) do you have room for it? Will the air clearn hit the hood if you raise the carb?
2.) do you have the right adapter (ford large base to AMC). Need to seal up with no vac leaks.

Also your PVC wants Manifold vac ...... so you can connect it to any port below the carb (on the intake manifold).
Good luck

I have the Ford Mustang plate with the PVC port that your talking about. PM me if you want it. I'll let it go for cheap. Send E-mail address and I'll send a photo.

Two things to check before you do this ......
1.) do you have room for it? Will the air clearn hit the hood if you raise the carb?
2.) do you have the right adapter (ford large base to AMC). Need to seal up with no vac leaks.

Also your PVC wants Manifold vac ...... so you can connect it to any port below the carb (on the intake manifold).
Good luck

I'd really like to get pictures of the plate you have. Also the Mustang carb I installed on my AMC 2bbl intake was a direct bolt on. I don't remember the bolt pattern but it's the same as my old mc2100

My e-mail address is hamf954@hotmail.com


Frank