Quote:
Originally Posted by mpgx2
What I am working through at the moment is combining
water-injection with lean burn.
I am led to believe that one third of fuel is used as an
internal combustion chamber coolant.
During combustion, it's the vapour that explodes and
the fuel liquid is just exploded and sent to the cylinder
walls to cool them.
If you go lean, you are just reducing the fuel component
that was destined for 'cooling'. That's why everything
'goes hot'.
Apparently, you can substitute that fuel for water and
it will achieve the same effect.
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i was under the impression that the reason an engine heats up while running lean is that the explosion in the combustion chamber travels at a slower spead allowing the heat time to transfer into the metal around it. this slower spead also decreases power output of the engine and raises the temp of exhaust gases going past the exhaust valve, if there is a flaw in the metal of the valve it has a chance to burn at that flaw.