what is your vaccuum at idle?

I just noticed its stays around negative 9-10.

It used to be about 15- 19.

I hope this is normal

 

Ive got nismo cams and 8.5 to 1 pistons and vacuum at idle is 10 to 11 . But I think it has more to do with the cams than the compression . Not sure

 

mine is at 11-12 at idle...double check all the vacuum lines...this could be normal/is your gauge dead on when the car is off? (at 0)
what boost are you running? is it tuned yet?

 

mine is 18 or so

 

Are we talking PSI or mmHG.

I usuallyi see between -7 and -10 psi....depending on the cams and compression ratio. Lower CR engines, or higher lift/duration cams will result in slightly less vaccum.

 

yep, found it.
i havn't fully connected my blitz boost controller to my wastegates!
I figured the selonoid would stay closed, pfff what do i know, anyways,
the car idled fine, just thought it was odd.
now time to set a tuning appt......

 

When ur Cammed out u generally have a drop in vacuum due to overlap, But I dont know that the after Market Z cams are that radical. Chk for vacuum leaks. Chk with MIA ------ U were too quick for me !!!!