In theory, the hotter the enigne is (relative to ambient), the more
power it will produce, but I don't know that 20 deg. will make a bit of
difference. On the other side, a cooler engine bay will mean a cooler
fuel/air charge and less chance of vapor lock, so I'd run it as hot as I
could until I had fuel problems or overheating at idle.
Just my 2 BHP worth.
James J.
james wrote:
>Gents, I am thinking about putting my new engine back into my V8. It is a
>'63 Olds 215 with 4bbl. My current thermostat is a 185 deg stat, the book
>lists a stock opening temp of 167-172. Can anyone offer any good reason to
>chose one stat over another. In the range that I am considering, I think I
>have 165, 175, and 185 available. I live in Ohio FWIW. I don't expect to
>have any problems with the 185 stat as that is what was installed in the
>first engine, but if there is a reason to go for a lower temp I would like
>to know. I need to replace it either way. I know that emissions are lower
>for higher temps but I am permanently emissions exempt so that is not a
>factor. Are there any performance benefits to a certain temp over another?
>Any other benefits/considerations?
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