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Village Idiot
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The cylinder temp should be fairly close as long as you have the tune up right. As far as engine temp goes, that depends on your setup. Many bracket racers (cars, not boats) use a thermostat to maintain constant temps anyway so for them it is just the same. The cooling system I have setup in my boat keeps my gas engine right around 135-140* and the oil temp right around 210* on long hard runs. If I were going to E85 I might not pick up as much water to try and keep the temps about the same.

To answer your question, I personally would not change my lash settings for the fuel. If things are set up right, the oil temp should stay about the same and therefore keep a similar temp for all of the valve train components. That is just my thought anyway, so really what is it worth?

Paul
 
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