That's not a problem with old cars and catalysts
as long as you dont run leaded fuel (if you can
still find any). Most high performance cars runs
on rich mixture and the cat likes that. If it runs
too lean you will get more NOX and probably
hole in the pistons later. A high flow cat does not
"steal" any hp either. An oxygen sensor with
fuel injection will make it run cleaner but it's not
necessary. We now have catalysts on lawnmovers,
chain saws and all sorts of 2 and 4 stroke engines.
The only thing I dont like about them is that it's
difficult to get a turbocharged engine to spit
flames from the tailpipe during gearchanges.
Thomas
datsunmike wrote:
> I don't think cats are the answer for old cars as the mixture has to be
> exact, or close to it, so they don't burn out.
>
> Mike
>
> ----- Original Message -----
> From: "Thomas - Sweden" <csp311@telia.com>
> To: "Paul" <9laser3@bright.net>
> Cc: <datsun-roadsters@autox.team.net>
> Sent: Tuesday, March 04, 2003 2:50 PM
> Subject: Re: Owning a roadster in California may become illegal
>
> > You will need to put catalytic converters on them - I bet.
> > They have done something similar in Germany with a
> > very expensive road tax if you dont install a cat on your
> > oldtimer. I think there's some excempt for really old cars.
> > In Sweden we drive oldtimers (+30 years) without paying
> > road tax (we pay energy tax on petrol which makes the
> > price to US$ 4.50/US gallon) but nobody say's anything
> > about emissions as long as it's below 4.5% CO on idle
> > during the car inspection.
> >
> > Thomas
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