What vacuum is the engine supposed to pull at idle??
05-17-02, 08:53 PM
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What vacuum is the engine supposed to pull at idle??
This is something I never got into.....
I forgot I had a vacuum gauge on the shelf... so I popped it on while the car idling, and it pulled about 13-14 inches..... By the indicators written on the dial that is a tad low, but thats assuming for piston engines....
I am assuming the porting may cost me a bit of manifold vacuum at idle, but the idle is very good...
Anyways... this normal?
I forgot I had a vacuum gauge on the shelf... so I popped it on while the car idling, and it pulled about 13-14 inches..... By the indicators written on the dial that is a tad low, but thats assuming for piston engines....
I am assuming the porting may cost me a bit of manifold vacuum at idle, but the idle is very good...
Anyways... this normal?
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