S4 / RS4 (B5 Platform) Discussion Discussion forum for the B5 Audi S4 & RS4 produced from 1998-2002

EFU users: Could you please log boost via VAG-Com (115) or ECU Explorer and compare with EFU #s ?

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Old Jan 22, 2007 | 09:54 AM
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Default EFU users: Could you please log boost via VAG-Com (115) or ECU Explorer and compare with EFU #s ?

I have a TCD that does not allow accurate boost logging via VAG/ECUx, but I'd like to see some data comparing the two. Thanks to anyone that actually does this.
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Old Jan 22, 2007 | 10:04 AM
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Default Didn't notice any significant discrepancies here.

While my car was on the dyno on Saturday, I manually observed the numbers in the display while ECUx recorded.

Figures seemed inline, but I suppose I could try for a video.<ul><li><a href="http://www.flwse.com/images/steve/Audi_Tech/ECUx/4runs_compare_graph_chris.htm">http://www.flwse.com/images/steve/Audi_Tech/ECUx/4runs_compare_graph_chris.htm</a></li></ul>
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Old Jan 22, 2007 | 10:40 AM
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Sweet, nice example of EGT enrichment. I'll go take a look at the others now.
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Old Jan 22, 2007 | 03:59 PM
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Default n00bie response

My EFU showed a max value of 16.0 psi, with a logged max value of 4600 mBar absolute.

Was noodling around with conversions and the FATS template, but ran out of time. Could someone show me the light?

Thanks,

Chris
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Old Jan 22, 2007 | 04:30 PM
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Default 4600 mbar absolute !?!? Wow, that's way more than 16 PSI.

You are asking for a conversion of mbar to psi?

1 bar is 1000 mbar

absolute readings include ambient pressure (actual boost at idle) so you need to subtract that.

~14.5 PSI is 1 bar

If you were to convert your 4600 mbar absolute to PSI assuming 1000 mbar (1 bar) atmospheric pressure, you'd be making ~52.2 PSI.

4600-1000=3600, 3600/1000=3.6, 3.6*14.5=52.2!
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Old Jan 22, 2007 | 04:47 PM
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Must go retest. That makes NO sense.
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