data log block 115: Actual boost is +/- 100 mBar from requested boost....Problem? Leaking boost??

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04-09-2002, 09:16 AM

[ej257]

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data log block 115: Actual boost is +/- 100 mBar from requested boost....Problem? Leaking boost??

Did a data log of block 115. Ran at WOT from 2nd thru 4th gear. Actual boost was between 1800 and 1900 mBar constantly, but requested was usually about 100 or so more mBar. Is there a problem and I am leaking boost, or is that discrepency between actual and requested normal or ok?

temps were 45

time for the 710n?

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04-09-2002, 09:23 AM

rigor

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My 01.5 chip...

It requests 1.22 bar of boost, then the turbo spikes to 1.36 (20psi) then makes its way back down towards 1 bar.

This is an apr chip. You can definitely feel the 1.36bar spike.

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04-09-2002, 09:34 AM

mdwsta4â„¢uroslut

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my apr chip holds at 20, peaks at 23 on a 2001.5

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04-09-2002, 09:38 AM

[ej257]

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but is the 100 mBar difference between my actual and requested boost a problem?

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04-09-2002, 11:01 AM

CMH

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No it wont be a problem. You might see a closer boost level

in a higher temp since the cold air causes a lower PSI since the air is denser. This small problem was fixed with the dbw boost sensor which sends a signal to the ecu and the ecu tells the turbo to make more or less boost to stay closer to the requested boost level.