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Technical Topics B58 6-Cylinder Turbo Engine / Drivetrain / Exhaust Modifications bm3 boost gauge

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      12-25-2023, 11:40 AM   #1
Shadowfantasy
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bm3 boost gauge

Hello guys
Why does my boost gauge (pre throttle) show high numbers even if i am standing still (14.5) and when on throttle shows 30+ is there a configuration that i need to change or a different gauge?
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      12-25-2023, 01:24 PM   #2
xnick101
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Look at intake manifold pressure.
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      12-25-2023, 04:11 PM   #3
Shadowfantasy
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Still shows 13 psi standing still
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      12-27-2023, 09:16 AM   #4
cyam
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Because normal atmospheric pressure is 14psi. Turbo ADDS boost OVER atmospheric pressure.

So 14psi BOOST is actually 28psi TOTAL pressure.
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      12-27-2023, 09:21 AM   #5
Shadowfantasy
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Quote:
Originally Posted by cyam View Post
Because normal atmospheric pressure is 14psi. Turbo ADDS boost OVER atmospheric pressure.

So 14psi BOOST is actually 28psi TOTAL pressure.
Can i change the configuration so it only shows the pressure from the turbo?
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      12-27-2023, 01:49 PM   #6
xnick101
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Quote:
Originally Posted by Shadowfantasy View Post
Can i change the configuration so it only shows the pressure from the turbo?
Just subtract 14.7 from that number at wide open throttle. On ecutek my logs show 42 psi at WOT. But in reality, it's 27.3 PSI.
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