Quote:
Originally Posted by euromodder
So it made the same power on less fuel, i.e. by leaning it.
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I've tapped this elsewhere but maybe worth it here.
One of the techniques on older NA diesels (Pug 205 - where are you now ???) was to balance throttle against what the engine could make use of in terms of fuel. The theory was that if you overdid it, the effect was like smothering a fire with too much material. What you needed to do was balance it against usage to get the best. There was definitely a point where you got no more benefit from either higher revs or more throttle vs easing back and changing up.
As I understand it a turbo kind of reverses this - there is always too much air for the fuel being injected - unless you use the old fashioned (rotary pump) trick of turning up the fuel. That gave you more power but at the expense of smoke from the less than efficient burning fuel.