WB O2 Success

[Mark S. Riley]

I've got a Horiba and it takes 33 seconds from switch on. Ask me how I know.
I added 10 ohms to R4 and the DIY-WB warms up in about 35 seconds. Just a
couple more than the Horiba and much quicker on a re-crank than the Horiba
which again takes 33 seconds. Ask me how I know. I've had the Horiba for
twelve years. later, Mark

Of course you can add some more resistor and fire it up quicker. I
understand the sound of the porcelin cracking is not an extremely expensive
sound.

----- Original Message -----
From: "Kevin _" <kiggly at hotmail.com>
To: <diy_efi at diy-efi.org>
Sent: Monday, December 10, 2001 11:33 PM
Subject: Re: WB O2 Success


>
> I don't know exactly how the DIY-WB board's circuitry is set up to heat
the
> sensor, but I do know you should be able to heat it a bunch quicker than
> that.  The production NTK driver box heats the sensor in about 5 seconds
and
> the Horriba driver box heats the sensor in less than 10 seconds.  I can't
> confirm that you can just drop down the resistance to accomplish this
> properly and safely though.
>
> Kevin
>
> >There should be some 15 ohm resistors left over from the parts
> >kit. Add some of these time across R4 (the big 1 ohm), until the
> >sensor warms up between 45 and 60 seconds. (That is in
> >parallel with R4).
> >
> >BobR.
> >
> >
> > >
> > > Question:  It takes exactly four minutes for the sensor to heat up and
> >the
> > > LED to light.   Is four minutes heating time typical?  This is a bit
too
> > > long for my liking.  I assume that there is a need to control the rate
> >of
> > > heating the sensor or else we wouldn't have the elaborate heater power
> > > supply.   I would like to shorten the heating time if possible.  Any
> > > comments on what the effect of shortening the heating time would be?
> > >
> > > Thanks,
> > > Neil
> > >
> > >
>
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