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94 850 turbo what should vacuum gauge read

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70
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skloon
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Year and Model: 94 850 95 850 04 S60
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94 850 turbo what should vacuum gauge read

Post by skloon »

Using torque on my tablet and wonder what the vacuum readings should be at idle and when driving, I get around 23 at idle and down to zero at near full throttle- I assume the zero is correct but I have been wrong before
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tryingbe
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Post by tryingbe »

20 inch at idle.
18 inch in drive.
10 psi peak boost.

For my 94 850 Turbo.
85 GLH, 367 whp
00 Insight, 72 mpg
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rspi
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Post by rspi »

Those torque apps do not work properly. The car does not report the data to the OBD2 port.
'95 855 T-5R M, Panther - 22/28 mpg, 546,000 miles
'95 955 T-5R Yellow Wagon, Lemonade, 180,000 miles
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos
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Ben850
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Post by Ben850 »

rspi wrote:Those torque apps do not work properly. The car does not report the data to the OBD2 port.
I have that app. and it does read the boost level, and vacuum very close to accurate albeit with a slight lag time in communication, through the OBDII port.

I have since installed a quality, digital/analog boost gauge and had watched them both simultaneously.

The readings were almost identical, aside from the lag.

I am not saying it is a professional piece of gear to bet your best dollar on, just a reference.
1993 850 GLT , You wouldn't know it.
1996 850 Turbo Wagon White.
1995 T-5R Black. New work in progress.
1998 V70 XC Cross Country White.
1994 850 N/A Wagon Black.
1997 850 Sedan Black.
1996 850R Wagon White.
1997 850 Sedan Red ( not white or black!)
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