On Sat, 1 Apr 1995, David Schwarze wrote:

> Dan Geer writes:
> > 
> > Is it {feasible,sensible,desirable} to add
> > catalytic converter to a bus? I'm thinking
> 
> Here in California, all busses since 75 (or is it 76?) have them,
> so it is certainly feasible!  If it is convenient for you to do
> -David

I don't think it's as easy as just cutting out a foot of exh pipe
and welding it in.
For one thing the pipes converge at the muffler and so you don't have
that "full flow foot" to put it in to.
But the big problem would be that it would REALLY increase your backpressure
to the point where your bus probably wouldn't run w/o a specially designed
camshaft and different timing.

The convergence problem could be overcome by putting in 4 cats (catalytic
converters not felines) one in each "header" and that would reduce back
pressure a lot too, but I still don't know if your bus would climb a hill
in anything higher than 2nd gear.

I'll stop rambling with my un-substantiated guesses.

Joel, you know everything, what do you think?

Cheers

<sstones@io.org>
SStones             Toronto,  Ontario.