Eric,
IMHO ... the rich mixture will make the combustion chamber temps
cooler but it goes right out the exhaust valve and burns in the pipe
... this is why leaving the choke on will color your pipe rather
quickly. Hows the SPA working ?? Did you do any of those "timed" point
to point MPH runs yet ??
campbell
----- Original Message -----
From: "Eric Harnish" <[EMAIL PROTECTED]>
Subject: Re: Heat Shield
> Engines are cooled with fuel . Can't see how a rich
> engine can cause an exhaust to run hot without a cat .
> snip <
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