DIY-WB defined

[cmillard at crutchfield.com]

Rob,
    The purpose of the Do-it-yourself Wideband O2 sensor is to replicate a
air to fuel ratio tuning tool that normally is only available starting off
at $1,500(est.)

Why:
Most factory fuel injection systems use a NB (Narrow Band) O2 sensor, or
two, or four, which are really only accurate at stoich (14.7:1) This is
useless for WOT (Wide Open Throttle) tuning, since we're shooting to tune
anywhere from 11.0:1 (big blown) - 13.1:1 (NA) at this point.

So:
A wideband sensor is accurate in a wider spectrum, giving us the ability to
tune the AFR's we need. An interface will be needed to report the data (bar
gauge, digital gauge, voltage output to pcm for logging, whatever.)

Thus:
The DIY project allows individuals to buy a PCB, a parts kit, and an
inexpensive (couple hundred est.) factory wideband sensor for input. 

Conclusion:
I've watched this project for a long time and envy the wealth of knowledge
shared in development, I wish I could have contributed, but It's way outside
my field (and caliber). 

I have faith in the project and my skills, so I'm going for it. DIY is the
way to go when other methods aren't cost effective.

Hope this helps,
-Christian


-----Original Message-----
From: Rob MacMorran [mailto:rmacmorran at yahoo.com] 
Sent: Friday, August 24, 2001 2:44 PM
To: gmecm at diy-efi.org
Subject: Re: DIY-WB Parts Kit update


Can someone re-explain the purpose/use of this kit for
new list members like myself?
BTW, hello, I am just a guy in St. Louis, MO who has
too many hobbies and too little time.  I joined this
list because I have a general interest in fuel
injection systems and improving fuel economy (also on supercarbs list (which
is not just about carbs btw)), but also because I am currently sticking a 95
Corvette LT1 motor+transmission into a 1976 Datsun 280z for my weekend fun
car.  I will need to modify the ecm for various things such as VATS and the
fuel curve (because I will be installing an ATI supercharger as
well.)
I plan to use the car as a test bed for some fuel
economy experiments including hydrogen boost and water injection...

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