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
