Engine vacuum

[KAWMAN2]

can you eliminate the vacuum ball for the a/c door and go strait to manifold vacuum?

 

[Mcmahst]

No. Longer answer is, the ball is the reserve you’ll need when climbing a hill with the AC on. No ball, door closes half way up the hill and ain’t no one happy with no air.

 

[KAWMAN2]

No hills in Florida, I bypassed the ball and ran it hard today’s/c worked fine, but I will teplace the check valve and ball

 

[General karthief]

My answer would be a question, why eliminate the ball and check valve?

 

[KAWMAN2]

very hard to find down my way!

 

[General karthief]

Yours leaks?
Nobody thinks of saving those things.....cept me. PM me if you need it.
If you delete it the blend doors are set for defrost mode at vacuum loss so you hit the gas and the vacuum drops the blend door will switch back and forth as vacuum falls and rises but will not effect how the engine runs.

 

[KAWMAN2]

I thought the same thing I have a 331 strokker when i pour the coal to it it still blows air out the/c vents nothing out the defrost till i switch it to defrost, I do have a air gap manifold and a 850 cfm holley on it with a full race cam? the engine does not create a bunch of vacuum ?

 

[General karthief]

There are two vacuum bulbs under that right fender, one is for (IIRC) emissions stuff. It's shaped a little different.

 

[Jarhead67]

I thought the same thing I have a 331 strokker when i pour the coal to it it still blows air out the/c vents nothing out the defrost till i switch it to defrost, I do have a air gap manifold and a 850 cfm holley on it with a full race cam? the engine does not create a bunch of vacuum ?

I had the same problem of low vacuum, I installed a vacuum pump. EZ PZ