What happens after 1.5bar?

Mike Miller mikemilr at blackfoot.net
Thu May 1 14:29:43 EDT 2003


----- Original Message -----
From: "Mihnea Cotet" <mik at info.fundp.ac.be>

> Yes, there is a maxMAF map in the chips, it's a 5 by 1 points map, thus 5
> MAF values for 5 RPM points, 2-3-4-5-6k RPM. When the actual MAF value
> exceeds the programmed value, then comes into play a second map that looks
> about the same but has lower values, thus lower air flow, which equals to
> the issue of not being able to have boost exceeding a certain level until
> the leak is fixed, or the maxMAF values raised.
>
> HTH,

> Mihnea


This is interesting, How does it "know" what gear I am in? I would assume
that I am flowing a lot more air at 3k rpm and 1.3 bar in 1st or 2nd than I
am at 2k rpm in 4th or 5th. Yet, the over boost cutoff always kicks in right
at 1.3 bar on the gauge. Can hold 1.2 in any gear, just can't exceed it.

mike




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