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View Full Version : how much vacuum does a stock sc make



scpride
08-07-2008, 09:16 PM
i was just wondering because i dont think my car is making the right amount of vacuum.

KMT
08-07-2008, 09:30 PM
i was just wondering because i dont think my car is making the right amount of vacuum.

Stock gauges tend to vary.

My '90 auto says 18 at idle in gear, A/C off, engine warmed up. 22 in neutral. Hits 25 or more when coasting in gear.

steelman
08-07-2008, 09:35 PM
my 89 5speed XR7 makes 20 Lbs at cold start up...and stays there.

fturner
08-07-2008, 09:37 PM
A stock SC will make about 18-20 at idle neutral if your gauge is close to true if all is well. If your hitting 22 or so in neutral at idle I'd question how accurate the gauge is.

Neutral for auto or stick at idle will not make a difference worth mentioning.

Frit

nwnsc
08-07-2008, 09:41 PM
stock boost gages? i had 18 on my stock and when i put in the autometer it was 15 and boost went down 3 psi. from gage to gage so i guss my gage was off about 3 psi:rolleyes:

KMT
08-07-2008, 10:41 PM
I'd question how accurate the gauge is.

I'm shocked...you mean t'tell me that cheap, 20 year old stock factory gauges can't be relied on to read to the n'th inch?

Ya, think?

What was your first clue...the fact that it doesn't say 'Rolex' on it...? :D

fturner
08-07-2008, 10:45 PM
I'd question how accurate the gauge is.

I'm shocked...you mean t'tell me that cheap, 20 year old stock factory gauges can't be relied on to read to the n'th inch?

Ya, think?

What was your first clue...the fact that it doesn't say 'Rolex' on it...? :D


Whatever... guess you'd know better than me :o. Guess its time for me to pull out since its obvious I'm behind the times and do not understand whats going on.

Bye folks.

Frit