>Exhaust contains carbon dioxide and inert gases. Those gases cool the
>combustion process thus reducing chamber temperatures and in the process
>reduces the chance of preignition. Exhaust temperature has nothing to do
>with it, it's the affect the gases in the exhaust have in the combustion
>chamber.
I dont know where you learned all this but I dont agree. The gases "cool"
the combustion process but they sure dont "cool" the combustion chamber.
They're exhaust gases! The EG is a mixture of combustion byproducts and
unburned HC. By recirculating this into the CC, you do two things. You
burn the formerly unburned HC and you muck up the fresh charge. The EGR
mixes in with the charge, hopefully slowing down the combustion process.
Slower combustion equals more advance, equals better burn, equals even
better emissions (but a slight decrease in power).
-- Dave______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com
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