Vaccum during boost?
 

what should the vacuum on the boost gauge read when ur at idle? well whats good? i'm around 15

Re: Vaccum during boost?
 

Vacuum at idle should still be around 19" to 21" depending what kind of shape your motor is in. My z6 idles at 20-21" idle is at about 900 rpm.

Re: Vaccum during boost?
 

mine is about 19-20 hg on a built a6

Re: Vaccum during boost?
 

mine is about 18 on stock boosted b16....

Re: Vaccum during boost?
 

19"HG bang onT 830RPM

Re: Vaccum during boost?
 

mines about the same as everyone else..........15 seems a bit low

Re: Vaccum during boost?
 

I noticed with my car that after I adjusted the cam gears the vacum at idle went from 20 to 16. And when I put the camgears back to 0 the vacum went back to 20" hg.

Re: Vaccum during boost?
 

14" of vacuum on my D15 at 850 rpm, but I do have a big cam :)

Re: Vaccum during boost?
 

i ahve a stock cam and now it's at 10 :(

Re: Vaccum during boost?
 

then you have a vacuum leak most likely