Azaka

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

mr.zoom

iTrader: (1)

what if you are not running an airpump?

glenrx7

iTrader: (1)

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

matty

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

AMRAAM4

Thank you Azaka

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

CapitanCombo

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

Sizz813

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?

apneablue

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

seanfd3s

12.5-13 on a new street ported motor

Monsterbox

iTrader: (6)

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

Monsterbox

iTrader: (6)

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

seanfd3s

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

RotaryEvolution

iTrader: (30)

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.