[DML] Re: Performance Exhaust

["Dave Swingle" <swingle@xxxxxxxxxxx>]

If you have a question for Grady - just call his 800 number (although 
he's out of town at the moment). I don't believe he's currently 
marketing an exhaust system though. 

As for running an engine with no exhaust at all, I'm not sure where 
to start. This is just incorrect. Well-designed headers actually 
provide a scavenging effect increasing airflow thru the engine, and 
running an engine with no exhaust plumbing will destroy the exhaust 
valves in short order.

You are probably ready the wrong sources (internet mailing lists?) 
get some engineering textbooks on engine design if you'd really like 
to understand it. 

There are a couple of aftermarket exhausts available, I'm sure others 
will pipe up on these (sorry). 

Dave Swingle

--- In dmcnews@xxxxxxxxxxxxxxx, "Steve" <p2freak@xxxx> wrote:
> Gang,
> 
> In the archive, someone mentioned PJ Grady had setup a "green 
machine"
> with performance suspension and exhaust.  I saw the performance
> suspension on PJ's website, but is the performance exhaust 
available?
>  Is it a special item that you have to call and order in advance?
> 
> 
> Off the topic.
> From my readings, a real performance exhaust would be no exhaust
> headers or pipes at all.  Just discharge the exhaust gas straight 
out
> of the engine.  But... that wouldn't be street legal at some places,
> not to mention loud as hell.  Therefore the catalyst converter,
> muffler setup.
> 
> Avoid back pressure like plague, because back pressure essentially
> keeps some exhaust gas mixture in the cylinders, preventing  fresh
> fuel-air mixture from filling up the cylinders.  Unless, you can do
> some fancy valve timing work and piping the exhaust gas around like
> Honda cars. 
> 
> 
> Steve
> VIN#04421






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