<VV> RE: Lower shrouds

Harry Yarnell hyarnell1 at earthlink.net
Mon Jul 2 09:41:24 EDT 2007


Dropped valve seat is the most probable. Never heard of cracked barrels.

harry yarnell
perryman garage and orphanage
hyarnell1 at earthlink.net
----- Original Message ----- 
From: <Pitts10ch at aol.com>
To: <hmlinc at sbcglobal.net>; <ronh at owt.com>; <virtualvairs at corvair.org>
Sent: Monday, July 02, 2007 9:38 AM
Subject: Re: <VV> RE: Lower shrouds


>I live in CT and it is hilly around here of course.  I see 300 degrees 
>most
> of the time when I am zipping around the curvy hills at power.  I do  see 
> it
> drop when on the back side of a hill about 50 degrees over a minute or 
> two.
> With the shrouds on, I see 400 - 410 on the highway.  That seems  hot to 
> me but
> I come from aircraft engines and 400 + is pretty warm on that  front.  I 
> can
> see that I could be shock cooling on the backside of a hill  which causes
> cracking in aircraft engines between the spark plug hole and the  exhaust 
> valve.
> Anyway, I think IL is probably a really safe bet on  the shroudless and I 
> am
> probably on the ragged edge when going down a long  hill.  Has anybody 
> ever
> heard of cracking jugs on these beasts?  If  that is not the concern what 
> other
> negative effects could over cooling  have?
>
> Fingers worn out,
>
> Chris H.
> '66 140/4
>
>
>
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