O2 voltages

[Bruce Plecan]

I *think* in the Porsches they use a closed loop WOT.
I haven't heard of any conveters that don't use a rich lean cycle, but they
may exist.
The oems try to keep the cycling to a min., so that the driver doesn't feel
a lean surge
Bruce


> So, production cars with wide band O2 still cycle about stoich for
> the converter's sake?  Do they at least have a much tighter cycle?  Or are
> other changes made that make cycling about stoich unnecessary?
> --Byron

> > Nope,
> > the 14.7 is for the EPA, Period.
> > There is no reason to waste that much fuel at cruise, other then for
those
> > folks.
> > Then they swing it way rich and lean to keep the converter at operating
> > temp..
> > Did a car at the PW that was happy as punch at 15.25-15.5:1  light
cruise,
> > and this was a big car and engine.
> > I'll bet ya 50 cents I will get the GN to almost 16:1 in light cruise
and
> > still have a 12 sec car.
> > Bruce

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