Re: [DML] Single turbo muffler
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Re: [DML] Single turbo muffler



The reason for the large pipe immediately exiting the turbo is to allow the
gasses to completely escape the turbine. The action of the rotating impeller
and the shape of the housing cause the gases to 'roll' out of the turbo, If
the pipe isn't large enough they have a tendency to roll back into the
housing and slow the rotation speed, thereby reducing boost and increasing
lag. Once the gas has passed about 15 to 18 inches the flow has straightened
out. A larger pipe beyond this point wouldn't do much good. In fact the
tapered pipe actually increases the exiting gasses velocity. That's not to
say an even smaller pipe would boost power. BAE did their home work and I'd
stick with what you have.

Bruce Benson

> I need some advice. I have a single BAE turbo. The exhaust pipe that
exits the turbo unit is approx... 3.5 inches in diameter. This pipe is
about 4 inches long and then is reduced to about 2.5 inches and is connected
to the muffler and then a similar small diameter tail pipe. Is this a
necessary design? I think that the exhaust is being choked off. If I were
to eliminate the pipe reduction and get a bigger inlet and outlet muffler,
would I get more power? Or would this not provide enough back pressure and
I would lose any low end that I have? Thanks for your ideas?
>
> Rich
>
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