[s-cars] RS2 MAF meter

[Robert Pastore]

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O2 sensor only comes into play closed loop.    WOT ( when all the fun SHOULD
start) is open loop, no help from the 02 sensor.  WOT is also when you build
boost -- do you really want to risk a mixture that is less than ideal with
20+ lbs of boost?
Bob

-----Original Message-----
From: Charlie Smith [mailto:charlie at elektro.cmhnet.org]
Sent: Thursday, April 17, 2003 4:30 PM
To: mlped at qwest.net
Cc: s-car-list at audifans.com; charlie at elektro.cmhnet.org
Subject: Re: [s-cars] RS2 MAF meter


Earlier, mlp qwest wrote:
>
> No.  You can swap parts, but they don't always run well together.  Ditto
the
> screen / no screens issue.  I believe opinions on the list have varied as
to
> whether the those trying the mod have noticed an improvement, or not.

You guys have to remember that the O2 sensor system is in action here.
Even if your MAF is off calibration for the values in your ECU, you
will sort of limp along.  Because when you get to a steady state with
the go-fast pedal, the O2 system will put the mixture where it want's
it to be.

You may have stumbles or flat spots getting to steady state, because
the basic mixture is being set wrong by the ECU because it is getting
invalid signals from the MAF.  Same is true with different injectors
or when you've been fiddling with the fuel pressure.

    - Charlie


  Charlie Smith   charlie at elektro.cmhnet.org  614-471-1418
  http://www.elektro.com/~charlie      Columbus Ohio   USA
  http://www.elektro.com/~audi     photos & technical info

  95 S6 Quattro  -  24 PSI, RS2 6 speed, and other features
  97 Dodge Ram   -  35 PSI, 4x4 w/Cummins turbo diesel



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