<VV> Re: VirtualVairs Digest, Vol 31, Issue 7

Tony Underwood tonyu at roava.net
Fri Aug 3 18:14:01 EDT 2007


At 10:49 PM 8/2/2007, Roger Gault wrote:
>Tony,
>I wondered about the logs heating the heads too.  In particular, I wondered
>if that was the reason the left side thermistor reads higher (under the
>log).  So, I insulated the area between the logs and the heads with multiple
>layers of aluminum foil to block any radiation.  I was shocked to find that
>I couldn't see any difference in the thermistor reading (actually, a
>thermocouple mounted on a bolt in that position).
>
>I still think the logs should heat the heads, since they're probably running
>somewhere above 1000F at highway speeds, but I don't know how to explain
>away my experimental results.


As long as the fan is blowing air through the heads, it's likely the 
manifolds won't contribute much.   But when you shut down the engine 
and it sits there with the hot manifolds radiating, the heat soak begins.


It's as good a reason to look at headers as any other.



tony..


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