What about the issue of lubrication? If the engine runs hotter the oil is
also hotter. Does the hotter oil lubricate less well?
Regards,
Jim B.
----- Original Message -----
From: "David Kernberger" <dkern@napanet.net>
To: "James J." <m1garand@speakeasy.net>
Cc: <mgb-v8@autox.team.net>
Sent: Saturday, March 08, 2003 7:42 PM
Subject: Re: Thermostat
> 3/8/03
>
> James,
>
> If this theory is true it certainly goes directly against my
> understanding. The hotter the coolant is, the hotter every other part of
> the engine is also, I would think. This means the entire intake system
> would also be hotter. My thought is that this higher temperature would
> warm up the incoming charge of fuel/air mixture more, thus causing it to
> expand and lose density more than it would in a cooler condition. Then
> there would be less actual mixture (mass) in the cylinder, so less power
> would be produced. This lower density charge however, combined with
> quicker vaporization of the fuel, ought to improve fuel economy
slightly--a
> trade off for the power loss.
> Just my -2 BHP.
>
> Cheers,
> Dave Kernberger
>
> ----------------------------------------------------
>
> >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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