Open loop at WOT???

[Mark Romans]

I understand the "Learning" that the ecm does in closed loop is applied to
WOT values as well.  If it is necc to add fuel to get 14.7 afr in closed
loop it adds the same amount of fuel in WOT.  In wot it just goes to a
commanded AFR that is richer than 14.7-1.  My 87 vette stock commanded
11.97-1 at higher rpm's with the stock prom.  All fixed now though.  13.0 to
one commanded at higher r's,  12.5 at peak torque.  Pulls much better.  02
sensor says over 800mv at wot.
Mark
-----Original Message-----
From: TBK <terryk at foothill.net>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Monday, August 03, 1998 8:37 PM
Subject: Re: Open loop at WOT???


>I was told at WOT, Closed Loop values are used. It is pseudo-quasi open
>loop.
>
>TK
>-----Original Message-----
>From: Reiswig, George <george.reiswig at intel.com>
>To: 'richard vandervoort' <fastski at mailexcite.com>;
>diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
>Cc: Reiswig, George <george.reiswig at intel.com>; Burleson, RandyX D
><randyx.d.burleson at intel.com>
>Date: Monday, August 03, 1998 2:55 PM
>Subject: RE: Open loop at WOT???
>
>
>>Thanks for the response, Richard.  I suspected that that might be part of
>>it, but wasn't sure.  I guess the OEMs don't think their cooling systems
>are
>>up to the task at consistent WOT?  Or is it because detonation is more
>>likely at WOT?
>>
>>At any rate, thank you for the answer.
>>
>>GR
>>
>>> -----Original Message-----
>>> From: richard vandervoort [SMTP:fastski at mailexcite.com]
>>> Sent: Monday, August 03, 1998 2:06 PM
>>> To: diy_efi at efi332.eng.ohio-state.edu
>>> Cc: george.reiswig at intel.com
>>> Subject: Open loop at WOT???
>>>
>>> The OEMs purposely run rich at WOT because the engine
>>> runs cooler.  Emission are not regulated and there
>>> isn't any effect on MPG numbers since they do not use
>>> WOT during fuel economy testing, so there isn't any
>>> penalty for running rich.  Someone has probably already answered this,
>but
>>> I couldn't find it in the archive.
>>>
>>>
>>> Free web-based email, Forever, From anywhere!
>>> http://www.mailexcite.com
>>
>