Re: Exhaust back pressure

[Ron Soave <soavero@yahoo.com>]

> Can anyone explain to me why an engine would ever
> need back pressure because 

I can't, because they don't.  What I have been trying
to say is that you can tune a header to help scavenge
a cylinder, which is the same as having no
backpressure.  It is simple - high pressure in the
cylinder, low pressure in the exhaust, more flow.  

=====
Ron Soave
"You Are What You Remember"
1960 Bugeye
1972 BGT