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Importance of vacuum readings on boost gauge?

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Old 01-23-2007, 02:22 PM
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Default Importance of vacuum readings on boost gauge?
I'm looking for a replacement boost gauge and see that some have vacuum readings and some dont. Is there any significant reason for the vacuum readings?
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Old 01-23-2007, 03:01 PM
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Default important, imo. you'll know instantly if you have a vac leak with the vac gauge.
easier to judge boost threshold and stay out of it if you dont want to be in it.

i wouldnt buy a boost only gauge unless i had a diesel.
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Old 01-23-2007, 03:54 PM
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so if the needle goes to 0 then you have a boost leak...correct (noob ?ion)
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Old 01-23-2007, 03:57 PM
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hadnt considered that, thanks.
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Old 01-23-2007, 04:00 PM
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nice sig, finally looked at it closely.
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Old 01-23-2007, 04:08 PM
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Makes sence. Hadnt thought of it before.
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Old 01-23-2007, 04:49 PM
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i found a leak,, my vac was 15 now its 20 strong
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Old 01-23-2007, 06:42 PM
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2nd on the 2nd point
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Old 01-23-2007, 07:58 PM
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what is stock vac supossed to be at idle, i'm around 21-22? Could something be wrong?
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Old 01-23-2007, 08:01 PM
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Yep, well said. I use vacuum info to get max throttle without boost while cold.
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