NJFBOA - Home of New Jersey's Camaros and Firebirds - View Single Post

IROCdan330 · 11-07-2008, 06:44 PM

Exhaust gas is inert and doesn't burn like air/fuel. EGR comes on at cruise and puts a layer of inert gas in the cylinder which in turn allows less room for air/fuel mix which means a smaller flame which in turn lowers combustion chamber temps and NOx emissions. This is pretty much the reason it only comes on at cruise, and will stall a car if it opens at idle. This is how I understood it in school. It offers no performance benefit with it there or not there so long as it is functioning properly.

11-07-2008, 06:44 PM	#27
IROCdan330 12 Second Club Join Date: Sep 2004 Location: Vineland Posts: 928 iTrader: (0)	Exhaust gas is inert and doesn't burn like air/fuel. EGR comes on at cruise and puts a layer of inert gas in the cylinder which in turn allows less room for air/fuel mix which means a smaller flame which in turn lowers combustion chamber temps and NOx emissions. This is pretty much the reason it only comes on at cruise, and will stall a car if it opens at idle. This is how I understood it in school. It offers no performance benefit with it there or not there so long as it is functioning properly. __________________ 87 iroc with the usual go fast stuff heavier than your half ton.