I recently went to a tractor pulling event and was surprised to see so much black smoke coming out of diesel engines. You were allowed in the pit areas so I asked the guys about producing so much black smoke and "doesn't that mean less efficiency / over fueling" and they said it was due to water injection. They spray it in the cylinders and the turbo.

Sure enough the black smoke coming out of the engines smelt more like a steam engine than diesel.

Still stupid if you ask me though - but I learnt something.

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!