Re: The Rapp on exhaust

[Frank Deutschmann <fhd@interport.net>]

LToy@aol.com sez:
> seems to me that if this really were a low cost way to efficient power, the
> factory would have done this.

It is not at all low cost -- that's the common fallacy!  In order to use a
wrapped exhaust system, you really have to have an exhaust system fabbed from
321 stainless, or Ti.  This is seriously expensive!  Anything, and I do mean
anything, less will crack, distort, fall apart, etc.

As far as performance gains go, the real gains are going to be pre-turbo
insulation -- that is where the delta-t is at a max, so the potential for
heat loss (and corresponding drop in gas velocity) is greatest.

-frank
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