Quote:
Originally Posted by Diesel_Dave
So with the turbo, the lower speed means lower friction losses & lower pumping losses. The heat loss to the cylinder walls should also be less because the ratio of fuel burned to surface area has increased.
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you pump three times the air, you have 3 times the pumping losses with a diesel.
friction is mouse nuts in terms of efficiency (mouse nuts are so small as to be really hard to measure).
Diesels have a slow burn rate, so they can't turn high RPM. To make a diesel compete with a gasoline engine, the only way to keep the weight of the engine similar is to put a turbo on the diesel.