<VV> Re: heating the oil

[Robert Coffin]

Hi Bob ,
I used the red color RTV silicone rubber coating  , because it was the only
high temp stuff available at the time. I wouldn't classify it as paint , since
I applied it at least .075" thick.
And it was actually a insulating material , unlike most paints.
Actually I don't  think the color of the material matters very much ,and
lately I have been using the black high temp RTV , as I think it looks
"nicer".
White ,of course , would be better at reflecting any radiant 'Q". Haven't
found any available.Have a source?
On the next Corvair performance engine , I may try one of those header wrap
materials on the pushrod tubes and exhaust stacks.
It sure works great on the header on the wife's restored 1600 Datsun roadster,
reducing underhood temps significantly.
Bob C
  ----- Original Message -----
  From: BobHelt@aol.com
  To: dryenko@mindspring.com
  Cc: virtualvairs@corvair.org
  Sent: Saturday, February 05, 2005 9:59 AM
  Subject: Re: heating the oil


  In a message dated 2/5/05 7:00:20 AM US Mountain Standard Time,
dryenko@mindspring.com writes:


    keeping the  radiant and convective heat from the
    exhaust pipe/ manifold away from the pushrod tubes, and the oil therein,
is
    justified.



  Hi Bob,
  I couldn't agree with you more. Everything you said is "right on".

  But the question wasn't whether keeping the heat away fron the pushrod tubes
was good, or not. The question had to do with whether painting white paint on
the pushrod tubes was effective in lowering oil temperatures. That was what I
was questioning.

  Finally , on my race engines , I have seen a measurable oil temperature
  reduction by coating the outside of the pushrod tubes with red high
  temperature RTV silicone rubber on at least the outer 1/2 of the tubes, as
a
  insulating medium.

  OK, good, here is another data point. But here you used something different.
Why didn't you use white instead of red paint?  Would white have worked as
well as red? It seems again, that we're not comparing apples and apples.
  Regards,
  Bob Helt