> G Mann wrote: > With the turbo working correctly you are now getting a much > increased air charge into the engine.
Correct. > More air in a diesel means more power with a moderate increase in fuel. Not so correct. :) Except an wide-open, max power a diesel engine always has an excess of air. The fuel injected burns only as much air as there is fuel to burn. The rest of the air is simply along for the ride. Simply stuffing more air into a diesel engine increases the effective compression ratio. This means it is able to extract a bit more mechanical force from the fuel it does burn. Running a turbo-supercharger scavenges exhaust heat to drive the intake compressor. This compressed intake air overcomes pumping losses as well as increasing the effective compression ratio. Since the exhaust heat is otherwise thrown out the tailpipe, using it is big part of where the _efficiency_ is gained. > Less air ment you had to push more fuel into the combustion > process to expand and drive cylinders but it's a losing > combination power wise in the Suck, Squeeze, Bang, and Blow > equation. No. Less air means less fuel _could_ be burned because the engine limits the fuel load based on the air charge. Less boost means lower efficiency _and_ less maximum power. -- Philip _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
