how much vac. do you normaly pull?

dbsupra90

toonar
Apr 1, 2005
2,374
0
0
indiucky
vac is measured in in/hg but yes 20-22 is very good.

usually 18-22 is a healthy motor. if vac is low, doesnt hold solid, etc it is a sign there is a problem.
 

born2drv

Banned
Nov 1, 2005
1,199
0
0
Burbank, CA
My maftpro measures it more accurately then my boost gauge... it shows -12.2psi = -24.8in Hg

If your guage does read in psi you x by 2.036 to convert it to get in Hg.
 

futeki_supra

New Member
Nov 18, 2006
295
0
0
lincoln, NE
yea the vac. on my gauge reads in Hg. sorry

and when I stomp on the gas and left off it instantly goes to like 24 or so.
then at adle I get around 22.

and getting a max of 7 psi right now....


offtopic: but how much oil psi does your stock gauge normally read..

mine gets to 40psi when cold, but in normal driving or w/e ir goes from alittle under the first mark ( at idle ) and then just under the 40 mark when higher rpm..

is that normal?
 

jetjock

creepy-ass cracka
Jul 11, 2005
9,439
0
0
Redacted per Title 18 USC Section 798
7 psi of what? Boost? If so that's fine. And what does "w/e ir" mean?

The vacuum is normal and the sign of a healthy engine. It should dip lower than idle when the throttle is blipped. The oil is also normal assuming you're running around a 30-40W for hot viscosity. Relax, you're good to go.
 

futeki_supra

New Member
Nov 18, 2006
295
0
0
lincoln, NE
w/e ir

means

what ever

and the IR is a typo for IT because the R is close to the T and I type so fast sometimes I hit the wrong key and dont notice, sorry
 

MKIIINA

Destroyer of Turbos
Mar 30, 2005
1,825
0
36
41
Plano, TX
your car sounds fine on all fronts. there are variation from car to car but yours seems to be right on spec with the tsrm.
 

catback

New Member
Mar 30, 2005
451
0
0
bitterville
what's with the avc-r
mine reads -.480> -.500 mm/hg < is that normal at idle,
and why is it measured like this? any way to change it?
 

jetjock

creepy-ass cracka
Jul 11, 2005
9,439
0
0
Redacted per Title 18 USC Section 798
At sea level the weight of the atmosphere (ATM) due to gravity is generally around 14.7 psi on a 59 F day. That means if you could balance a square inch of atmosphere about 60 miles tall on your palm it'd weigh that much. If you filled a tube with water and up-ended it in a dish the weight of the ATM would push the water up the tube 33 feet. That's a big tube so heavier mercury is used instead. In that case the mercury will be pushed up the tube 29.92 inches. It's the barometer you're probably familiar with from weather reports. 29.92 in/hg, 33 feet of water, or 14.7 psi is all the same. 29.92 inches also happens to be 760 millimeters. It's the metric measurement of in/hg.