Increased oil flow would help. But where are you going to get the oil from? The
liquid cooled heads are cooled from within. To pump a lot of oil into the
rocker covers could cause problems. Plus all that oil.has to get back into the
crank case. Oil provides 30 to 40 percent of engine cooling by drawing heat
away from components. That heat is then shead while in the oil pan. Control
temperature of the oil first. Oil breaks down fast the hotter it gets.Engine
baffling is very important. Stop and think about it. A lot of VW engines have
been out flying with no problems over the years. ENGINE/POWER MANAGEMENT. One
of the first things you learn when flying big engines. Power and temps go hand
in hand.Gary Hinkle ?Ex Corp pilot and A&P.
Sent from my Verizon Wireless 4G LTE smartphone
-------- Original message --------
From: Chris Prata via KRnet <krnet at list.krnet.org>
List-Post: krnet@list.krnet.org
Date: 04/27/2016 02:40 (GMT-05:00)
To: krnet at list.krnet.org
Cc: Chris Prata <chrisprata at live.com>
Subject: KR> FW: Type 1 Cylinder Heads - cooling
thats an interesting angle. your oil post also reminded me I was going to ask
about *additional* oil to cool the heads, as in a high vol oil pump, and an oil
line to each head spraying oil on the hottest area (between the valves?).
would that almost make them "liquid cooled heads"?
List-Post: krnet@list.krnet.org
Date: Tue, 26 Apr 2016 12:28:29 -0500
Subject: Re: KR> Type 1 Cylinder Heads
From: lrffrench at gmail.com
To: krnet at list.krnet.org
CC: chrisprata at live.com
???
Hi KR league,? of all the discussions that are so important about controlling
heat, I am surprised that so little discussion of oil happens. This is a big
decision. My research for my 1835 vw and oil has led me to Quaker State DEFY.?
I am running the 10w30 and the API-SL class. This is a semi- synthetic with
boosted zinc for anti-friction. In aircraft we can't use a full synthetic
because lead in av-gas will destroy the anti-friction adds in the pure
synthetics. Even if we plan to use mogas primarily, there may be the need to
use av-gas all of which have high lead.? The molecule size in synthetics, even
the blends, is smaller and is known to run cooler. Note:? Quaker State DEFY is
in almost identical containers with API-SN class oil. (Strange).? SN doesn't
have the boosted Zinc. You have to read the small print to get API-SL. The SN
class has been made for the auto engines with catalytic converters because the
high zinc has been known to ruin the catalytic converters. Since aviation
does use them (yet), we can benefit from the zinc friction reduction. Hope
this isn't noise on many of the great signals I read everyday from you
pros.Cheers,Rene Ffrench N44774. Austin, Texas
?? ?? ??
?
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