[Diy_efi] wbo2 questions galore
Daniel Nicoson
A6intruder at adelphia.net
Tue Feb 22 14:40:55 GMT 2005
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Jim,
Steve wants the WB so he can tune more accurately. The WB allows him to
have an accurate AFR anywhere between AFR=10 and AFR=20. The narrow band
are optimized for the AFR=14.7 ratio that is ideal for emissions compliance,
any extrapolation of their response curve beyond that narrow range is
inaccurate. The narrow band 02 is only used by the factory ECU during
closed loop - low power use. During WOT the WB rules because you can adjust
your fuel tables to achieve whatever AFR the engine combo likes.
He's trying to incorporate the NB operation also to let the factory ECU work
normally during low power. Some of the store-bought units do that NB
operation also.
Steve,
Some of the store bought units have really come down in price, I think $350
is the low end.
Another thought, for $6 and some welding you can add a third bung and run
the factory NB in their stock location, put any WB in the third bung and
tune away. That's what I do. I have a DIY-WB permanently installed and let
the factory NB stay in their usual location.
Dan Nicoson
-----Original Message-----
From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On
Behalf Of Jim Butterfield
Sent: Tuesday, February 22, 2005 7:47 AM
To: A list for Do-It-Yourself EFI
Subject: Re: [Diy_efi] wbo2 questions galore
Pardon me for just jumping in here... whats the problem with NB O2 sensors
and why would you want WB O2's????
steve broski <sjbroski at msn.com> wrote:
i want to replace both NBO2's in my S/C3800 GM with WBO2's. i found the
schematics and info at the WB-DIY site for using the L1H1 UEGOS. i
thought
with some additions for another 0-1V out for PCM to control from, it
would
work pretty well. however the cost of that sensor is a little. . .steep.
the
bosch LSU4 can be had for about $40. much more doable. it seems the
above
mentioned control circuit won't work. i can find no sources for specs on
LSU4. anybody have any info that might help? that would be really
fantastic.
i have my eye on a sanner/tuner for my car that has 3 additional A/I's(2
for
WB and 1 for whatever i want)so i can do some tuning. thanks for any and
all
help. steve
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<BODY>
<DIV><SPAN class=3D524342814-22022005><FONT face=3DArial color=3D#0000ff =
size=3D2>Jim,</FONT></SPAN></DIV>
<DIV><SPAN class=3D524342814-22022005><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D524342814-22022005><FONT face=3DArial color=3D#0000ff =
size=3D2>Steve=20
wants the WB so he can tune more accurately. The WB allows him to =
have an=20
accurate AFR anywhere between AFR=3D10 and AFR=3D20. The narrow =
band are=20
optimized for the AFR=3D14.7 ratio that is ideal for emissions =
compliance, any=20
extrapolation of their response curve beyond that narrow range is=20
inaccurate. The narrow band 02 is only used by the factory ECU =
during=20
closed loop - low power use. During WOT the WB rules because you =
can=20
adjust your fuel tables to achieve whatever AFR the engine combo=20
likes.</FONT></SPAN></DIV>
<DIV><SPAN class=3D524342814-22022005><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D524342814-22022005><FONT face=3DArial color=3D#0000ff =
size=3D2>He's=20
trying to incorporate the NB operation also to let the factory ECU =
work=20
normally during low power. Some of the store-bought units do that =
NB=20
operation also.</FONT></SPAN></DIV>
<DIV><SPAN class=3D524342814-22022005><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D524342814-22022005><FONT face=3DArial color=3D#0000ff =
size=3D2>Steve,</FONT></SPAN></DIV>
<DIV><SPAN class=3D524342814-22022005><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D524342814-22022005><FONT face=3DArial color=3D#0000ff =
size=3D2>Some=20
of the store bought units have really come down in price, I think $350 =
is the=20
low end.</FONT></SPAN></DIV>
<DIV><SPAN class=3D524342814-22022005><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D524342814-22022005><FONT face=3DArial color=3D#0000ff =
size=3D2>Another thought, for $6 and some welding you can add a third =
bung and run=20
the factory NB in their stock location, put any WB in the third bung and =
tune=20
away. That's what I do. I have a DIY-WB permanently =
installed and=20
let the factory NB stay in their usual location.</FONT></SPAN></DIV>
<DIV><SPAN class=3D524342814-22022005><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
<DIV><FONT size=3D2>Dan Nicoson<BR> </FONT> </DIV>
<BLOCKQUOTE>
<DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT =
face=3DTahoma=20
size=3D2>-----Original Message-----<BR><B>From:</B> =
diy_efi-bounces at diy-efi.org=20
[mailto:diy_efi-bounces at diy-efi.org]<B>On Behalf Of </B>Jim=20
Butterfield<BR><B>Sent:</B> Tuesday, February 22, 2005 7:47 =
AM<BR><B>To:</B> A=20
list for Do-It-Yourself EFI<BR><B>Subject:</B> Re: [Diy_efi] wbo2 =
questions=20
galore<BR><BR></FONT></DIV>
<DIV>Pardon me for just jumping in here... whats the problem with NB =
O2=20
sensors and why would you want WB O2's????<BR><BR><B><I>steve broski=20
<sjbroski at msn.com></I></B> wrote:=20
<BLOCKQUOTE class=3Dreplbq=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px =
solid">i=20
want to replace both NBO2's in my S/C3800 GM with WBO2's. i found =
the=20
<BR>schematics and info at the WB-DIY site for using the L1H1 UEGOS. =
i=20
thought <BR>with some additions for another 0-1V out for PCM to =
control=20
from, it would <BR>work pretty well. however the cost of that sensor =
is a=20
little. . .steep. the <BR>bosch LSU4 can be had for about $40. much =
more=20
doable. it seems the above <BR>mentioned control circuit won't work. =
i can=20
find no sources for specs on <BR>LSU4. anybody have any info that =
might=20
help? that would be really fantastic. <BR>i have my eye on a =
sanner/tuner=20
for my car that has 3 additional A/I's(2 for <BR>WB and 1 for =
whatever i=20
want)so i can do some tuning. thanks for any and all <BR>help.=20
=
steve<BR><BR><BR>_______________________________________________<BR>diy_e=
fi=20
mailing=20
=
list<BR>diy_efi at diy-efi.org<BR>http://lists.diy-efi.org/mailman/listinfo/=
diy_efi<BR></BLOCKQUOTE></DIV>
<P>
<HR SIZE=3D1>
Do you Yahoo!?<BR>Yahoo! Search presents - <A=20
=
href=3D"http://us.rd.yahoo.com/evt=3D30648/*http://movies.yahoo.com/movie=
s/feature/jibjabinaugural.html">Jib=20
Jab's 'Second Term'</A></BLOCKQUOTE></BODY></HTML>
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