All of the data I have ever read says that higher temps make less emissions.
I don't have the energy to look it up right now, but I will if I need to.
One bit of evidence I will throw in is that one of the reasons manifold heat
pipes came into existence is that the closer you can regulate intake temp,
the leaner you can run the engine. As with so many other things the more
efficient the combustion the less excess fuel you have to throw at an engine
to try to get the amount you want to burn burned. So if you can accurately
control intake temp, and keep cyl temps high enough to facilitate
combustion, the less fuel you waste by passing through unburned. At the
same time you can keep the engine from going lean and increasing emissions
that way.
James Nazarian
71 B tourer
71 BGT V8
85 Dodge Ram
----- Original Message -----
From: bown <bown@concentric.net>
To: James J. <m1garand@speakeasy.net>
Cc: <mgb-v8@autox.team.net>
Sent: 09 March, 2003 12:39 PM
Subject: Re: Thermo 101 and Oil question
> James J.
> Thanks for the excellent response. You should write text books!
> I am curious about your comment concerning emissions.
>
> <James J. wrote> "I should mention that hotter temps mean higher
emissions,
> too."
>
> Back in the old days it seemed like 180 F thermostats were the norm.
> Then when emissions became an issue 192 F thermostats became common.
> I was told that the higher temp thermostats were to help reduce emisisons.
> Any insight into this?
> Regards,
> Jim B.
///
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