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Originally Posted by jc05e46m3
Quote:
Originally Posted by Boss330
I was thinking of the stock boost and that BMW have said 18PSI is max boost. And that max boost is reserved for bad conditions (like high temp and/or altitude) in order to have a boost reserve so the engine always makes it's target power.
Basically this means that we should NOT see max boost on a cool day at sea level etc.
This is what would be interesting to see some datalogging of as well. This would be of most interest on a stock engine and no tune.
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I have datalogged and we do see max boost. When the conditions are worse, we see more than max boost (up to 20)...and yes, with no tune. |
Thanks!
Could you post the datalogging results? For instance with results for boost, IAT, altitude and MAF
If we really see 20PSI of boost in real world driving, then that is one piece of evidence that supports under rating (if we are to believe BMW's claim of a absolute max boost of 18PSI... This might have been misunderstood though and it might also be that 18PSI is max for normal conditions and the DME can use overboost for worse conditions?)