Variable Restrictiveness Exhaust

[Cameano at aol.com]

The only problem with these cutouts is, there's really no good way to install 
them, especially in newer cars, with stainless steel exhaust systems.  I came 
across a pair in the box, that a friend was tossing out.  Reason being, they 
are made of cast iron, and are only 2" inside diameter.  Something they don't 
mention in the catalog.  I didn't pick them up, don't need more junk.

Darren


In a message dated 5/13/99 10:50:15 AM Hawaiian Standard Time, 
TEBUTLER at mccain.ca writes:

<< I saw an exhaust diverter valve in the J C Whitney catalog which will allow
 you to do just what you are suggesting.  The device is controlled by a
 mechanical cable.
 Tom Butler
 
 > -----Original Message-----
 > From:	William T Wilson [SMTP:fluffy at snurgle.org]
 > Sent:	Thursday, May 13, 1999 3:41 PM
 > To:	diy_efi at efi332.eng.ohio-state.edu
 > Subject:	Variable Restrictiveness Exhaust
 > 
 > Okay, this seems to be the best place to talk about random, goofy car mods
 > that just might work. :}
 > 
 > Suppose I have a car that I want to pass emissions, but I also want it to
 > gogood.  Why couldn't I make some sort of cat-bypass system which would
 > allow the exhaust to flow openly at high revs, but flow through the cat at
 > more "normal" RPM?  Maybe a solenoid-activated valve attached to the tach,
 > or perhaps just a flap on a spring like at the top of a big-diesel
 > smokestack. >>