Re: Thanks-Exhaust Info!

[Steve Stegmann <stegmann@domain.elided>]

John,

Someday I'm gonna measure the backpressure on the glasspacks and the
turbos.  I'm still having a problem with people telling me there's more
backpresssure with a straight through glasspack than there is with a
muffler with lots of room for expansion or a change of direction.
Everything I learned about fluid flow tells me the straight through is the
lowest back presssure.

I can get you so many books containing the friction factors for various
bends, long radius - short radius, sudden expansion of flow area, sudden
contraction of flow area. I don't have one for perforated pipe with glass
packed around it. But this is really counterintuitive.

Steve

----------------------------------------------------------------------------
Steven A. Stegmann
     _/_/_/    _/      _/_/_/ "No free man shall ever be debarred the use
   _/    _/   _/_/   _/    _/  of arms.  The strongest reason for the 
   _/        _/ _/   _/        people to retain the right to keep and bear
    _/_/    _/  _/    _/_/     arms is, as a last resort, to protect 
       _/  _/_/_//       _/    themselves against tyranny in government"
 _/    _/ _/    _/ _/    _/    
 _/_/_/  _/     _/ _/_/_/         Thomas Jefferson, June 1776
----------------------------------------------------------------------------