sry, that's with a ported motor with about 8k on it

 

what if you are not running an airpump?

 

I am running an air pump, and also i just finished the vaccum lines. I looked last night and I am at 15 cold 13 14 hot....p.s. Thank you all for your help I now have a pretty good idea

 

how come my guage shows more vacuum then my power fc.

 

Thank you Azaka

That would mean I am getting 19in HG on a 65,000mile engine. Makes me feel a bit better.

 

I read -16inch of HG at the gauge
-0.58 from the Profec
both at ~800 revs
18000 on reman engine

 

Would a street ported engine have different vacuum levels than a stock one? And if so, what would be good numbers for the ported one?

 

I got between 16 & 17 @ 700-800 on stock motor with 85k miles...

 

12.5-13 on a new street ported motor

 

if your idle is fluctuating due to grounding, or worn plugs, or a/c windows acc crap then your vac will ofcourse move with the idle

 

do our vaccs compare at all to otehr cars? my friends 3sgte celica produces 25 at idle

 

I got a better built engine now and have 15-16 vac @ 780 rpm with 20k. sig has mods.

 

rotaries do not pull as much vacuum as piston engines, rotaries tend to produce more compression and vacuum at higher RPMs so you will see upwards of 25"hg from a high RPM decel.

ported motors will also produce less vacuum unless the port timing is not advanced which is a rarity.