MAFT adjusting lean....or too lean?
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MAFT adjusting lean....or too lean? I have been ATapping with adjusting the MAFT (now at 0 base,WOT 4% lean) and have steadily reduced the WOT O2 avg from .915 @ 0%, .905 @ 2% lean, and .895 @ 4% lean settings. All LTFT's are zero and no KR. I know wideband testing can give me the optimum setting, but was wondering if I continue to go "leaner" until KR occurs can I assume that I am pretty close? I can definitely feel the increased pull at high rpm with each adjustment, but can I be too lean with no KR? I recently added the SLP fan switch which I believe is allowing the leaner setting. Should I continue adjusting leaner without concern of harming the engine?
Thanks for the input.
Randy Hughes
Thanks for the input.
Randy Hughes
Re: MAFT adjusting lean....or too lean? Dude, your L-terms are 0, KR 0, and you're not even below 900 on O2's <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
I say lean that chit out a tad more <img border="0" alt="[devil]" title="" src="graemlins/gr_devil.gif" />
When I get my baby back I'm gonna shoot for the magic # 880 <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
EDIT: BTW, what does your A/F read at WOT?
<small>[ April 16, 2002, 10:19 AM: Message edited by: The Dragon ]</small>
I say lean that chit out a tad more <img border="0" alt="[devil]" title="" src="graemlins/gr_devil.gif" />
When I get my baby back I'm gonna shoot for the magic # 880 <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
EDIT: BTW, what does your A/F read at WOT?
<small>[ April 16, 2002, 10:19 AM: Message edited by: The Dragon ]</small>
Re: MAFT adjusting lean....or too lean? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by BLUEBYU:
<strong>I feel I can pull a few more ponies out her, but think I am going to wait till I wideband to see if it's worth taking out any contingency that I now think I have. Atmospheric conditions can take me to lean on the "wrong" day. You ask if I know my A/F numbers....I have read on other threads that they are getting the number from ATap, I wish I knew which selection would give the number.....Please enlighten me.
Later, Randy H.
BTW, I have the latest version.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Dude, I get frustrated with the various topics from which to chose <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
So I just scroll down to "Show all Items" and use 8 parameters in the gauges for my taps.
Air/Fuel Ratio will be there <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
<strong>I feel I can pull a few more ponies out her, but think I am going to wait till I wideband to see if it's worth taking out any contingency that I now think I have. Atmospheric conditions can take me to lean on the "wrong" day. You ask if I know my A/F numbers....I have read on other threads that they are getting the number from ATap, I wish I knew which selection would give the number.....Please enlighten me.
Later, Randy H.
BTW, I have the latest version.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Dude, I get frustrated with the various topics from which to chose <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
So I just scroll down to "Show all Items" and use 8 parameters in the gauges for my taps.
Air/Fuel Ratio will be there <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
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Re: MAFT adjusting lean....or too lean? It sounds like you are using the windows version. I am not because of cpu limitations... I am going to look a little closer at the selections to determine which is the A/F info. Maybe I should try loading the windows version and just select the A/F gauge, O2 data, and TPS. How good is the gauge reading? Does it make sense for your numbers?
Later, Randy
Later, Randy
Re: MAFT adjusting lean....or too lean? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by BLUEBYU:
<strong>It sounds like you are using the windows version. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yup.
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by BLUEBYU:
<strong>How good is the gauge reading? Does it make sense for your numbers?
Later, Randy</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Spot on! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
<strong>It sounds like you are using the windows version. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yup.
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by BLUEBYU:
<strong>How good is the gauge reading? Does it make sense for your numbers?
Later, Randy</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Spot on! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
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From: Overland Park, KS, USA
Re: MAFT adjusting lean....or too lean? I feel I can pull a few more ponies out her, but think I am going to wait till I wideband to see if it's worth taking out any contingency that I now think I have. Atmospheric conditions can take me to lean on the "wrong" day. You ask if I know my A/F numbers....I have read on other threads that they are getting the number from ATap, I wish I knew which selection would give the number.....Please enlighten me.
Later, Randy H.
BTW, I have the latest version.
Later, Randy H.
BTW, I have the latest version.
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Re: MAFT adjusting lean....or too lean? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by BLUEBYU:
<strong>How good is the gauge reading? Does it make sense for your numbers?
Later, Randy</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I get an 11.7 A/F ratio at WOT, and that drops to 11.2 A/F as I get into the upper rpm gauges. IMO it can't be that accurate for me. I'd be running insanely rich if that were true, but my Ltrims are negative or at 0, and my o2's are at .880
So my A/F ratio setting can't be right.
<strong>How good is the gauge reading? Does it make sense for your numbers?
Later, Randy</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I get an 11.7 A/F ratio at WOT, and that drops to 11.2 A/F as I get into the upper rpm gauges. IMO it can't be that accurate for me. I'd be running insanely rich if that were true, but my Ltrims are negative or at 0, and my o2's are at .880
So my A/F ratio setting can't be right.
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