Re: Choosing the Right Mufflers

["Joseph M. Shaw, II" <MikeIIDC@domain.elided>]

Tom Harais wrote:
> 
> Steve:
>  reasonance in an RPM
> range that actually scavanged the cylinders and increased volumetric
> efficiency to more than 100% on a natuarlly aspirated vehicle. This 
> I was saying, as you succintly put it, that it is all complicated: That
> turbo mufflers were originally designed to create some resonance 
> sacavenge the cylinder of course. They do have reverse flow as you pointed out.
> But, some of the newer ones are even "tuned" with reverberating metal
> plates at the ends of the internal pipes theoretically canceling out
> sound waves as the exhaust flows out and around to the next pipe. 
> And, someone else mentioned that "open exhaust" doesn't always provide
> the most HP in a street application	 (Post cylinder combustion going on
> I'm sure, probably helped by a richening of the mixture due to loss of
> backpressure combined with the O2 injected by the AIR system into the
> exhaust manifold.)
> 
> Tom H.
Tom-

Take it easy on us, here!!!  What in the Sam Hill is this?  Mechanical
Engineering 616?  No more big words!!!  I thought I had logged onto
"Thesaurus.com" or something!!!!

Michael