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Author Topic: Mercedes a45 boost pressure  (Read 491 times)
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« on: August 03, 2017, 09:23:27 am »

Hello!
I have a45 amg 2015 and I want to see boost pressure more than 1,5 bar (250kpa) but this is the maximum value in dashcommand. How can I solve this?
Thanks!
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FlyByMike
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« Reply #1 on: August 03, 2017, 07:25:29 pm »

that seems like a very extraordinary amount of boost (for me 1.5 bar = 21.75 psi) which is huge. really ?
Anyway, is the gauge top out at 1.5 ? or is that what you read on the gauge ?
You can change the max of a gauge with SkinXL, the editor or maybe the car's transducer maxes out at 1.5.
There's some posts here you can search for to confirm.
-Mike
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Weston@PPE
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« Reply #2 on: August 04, 2017, 11:40:56 am »

The OBD-II PID for manifold pressure maxes out at 255 kPa, which is 155 kPa (21psi) of boost. There isn't a way around this really, you can look into external aux sensors but that is about the only solution. If your vehicle supports SAE.MAF you can try to use a calculated boost value by entering CALC.MAP_A or CALC.MAP_B into the MAP PID box in the Vehicle Manager. This calculated value's accuracy will depend on the Volumetric Efficiency setting.

If I remember right, the A45 AMG is a 2.0L turbo with 26-28psi of boost in stock form, so its not too surprising he is looking for more than 21psi.
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