How much vacuum?

[9240sx]

How much Vacuum are you guys getting on your s13 motor's,Im getting in between 17-18,at idle.And it hits 20 when i rev the motor and let off the throttle.

[Jesse SR20]

I run about 18-20 at idle. On off-throttle deceleration, it hits about 24.

[9240sx]

So is my vacuum low?

[240Kuminachu]

Not always, it could be the gauge your using, I've found autometer to be a few inches off. My stand alone computer reads 21.4-22.8 at a 750 rmp idle. the autometer gauge only says about 18. 19 is where most motors are. I hit 26-28 on decel.

I would say your fine

[ETTInnov04]

Mine used to drop to below 20 when I first got my swap then after a few months and to this day it doesnt do it any more. My car also idles like it has a vacum leak but still read about 18-20 at idle. Could it be just a vacum leak?

[Nicksemianiw]

HAHA my $****ty Ractive boost gauge reads 14-15 VAC on idol lol but my car runs perfectly fine, so its probaly just the gauge. Pluss it had really bad manifold leaks but its fixed because i put the SS autochrome turbo manifold on