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Re: upgrades to my car
Chris Costanzo wrote:
> >Now a great idea (I think) would be to put the cat BEFORE the turbo.
> >It would improve emissions AND add even more heat to spin the
> >turbine with. That should end the EPA whining about turbos and
> >cold-start emissions that are a big reason for the lack of turbo
> >cars on the market.
> Well, this is a BAD idea. For one, the turbo is attached directly to
> the manifold, so where would you put it?
I was thinking of an OEM kind of thing, where they'd build it into
the manifold. I've read that some companies are thinking about this
as a possibility...
> But that's not the problem.
> Remember the `79-80 Turbo Stangs and Capris? They were the carbed turbo
> models. It had a draw through turbo system and mounted the turbo under the
> intake. A pipe ran from the exhaust manifold, under the engine, and up to
> the turbo. In that pipe, they put a converter. Now, the problem was, too
> much heat. The converter was notorious for burning up an breaking down.
Interesting. The cats they were using DID really suck, though. I wonder
if a good, modern one would have that problem.
> The turbo always got killed when chunks of converter were sucked into the
> impeller. Also, it slowed down the exhaust and caused even more lag.
I thought the lag was due to the draw-through design, not the cat.
> is, a very high flow converter after the turbo is the only way to get max
> power and keeps the sniffer happy.
Maybe. Problem is, it may not keep the sniffer happy enough in the
future. That's one of the reasons you see a lot of turbos going away,
or so I've heard...