<VV> Improving the heat conductivity of motor oil

[jvhroberts at aol.com]

 I've looked at this seriously! Oil has a low specific heat, there isn't much going through the engine from a cooling standpoint, and the oil cooler isn't to cool the engine, it's to cool the oil so it doesn't break down. 

As far as what pans and valve covers do, I'd need to see comparative data. For one thing, bolting a chunk of finned aluminum to another piece of aluminum is actually moving a fair bit of heat through simple conduction! 

Anyway, keeping the oil cool is important to protect the oil from excessive temperatures. But with a specific heat 1/4 that of water or less, and a flow rate that's a pittance compared to the coolant rate in a water pumper, the oil ain't doing much! 

 

John Roberts
 

 

-----Original Message-----
From: Mark Durham <62vair at gmail.com>
To: jvhroberts <jvhroberts at aol.com>; ScottyGrover <ScottyGrover at aol.com>; fastvair <fastvair at yahoogroups.com>
Cc: virtualvairs <virtualvairs at corvair.org>
Sent: Thu, Feb 2, 2012 10:21 pm
Subject: RE: <VV> Improving the heat conductivity of motor oil



John, you should take the cooling capability of the oil seriously.  In an air cooled engine, oil is a big part of the cooling where air cannot get to.  All the internals are cooled with oil. People get good benefits by adding oil capacity and finned valve covers and pans.  Yes, gm was not over generous with oil cooling, however, they did go after more with later generation oil coolers.  Mark Durham 

Sent from my Windows Phone


From: jvhroberts at aol.com
Sent: 2/2/2012 16:08
To: 62vair at gmail.com; ScottyGrover at aol.com; fastvair at yahoogroups.com
Cc: virtualvairs at corvair.org
Subject: Re: <VV> Improving the heat conductivity of motor oil


 Well, yeah, transformer oil is a coolant and a dielectric. There are no pumps or other moving parts in a transformer, and the temps don't get anywhere the boiling point of water, unless there's a fire! 

Not sure this is the way to go here. And in air cooled engines, the oil cooler is to protect the oil from excessive temperatures, not so much for cooling the engine. The flow isn't there, the heat capacity of the oil isn't there, etc. 

A fun mental exercise, but without a test, not sure how useful it would be in an engine. 

 

John Roberts
 

 

-----Original Message-----
From: Mark Durham <62vair at gmail.com>
To: ScottyGrover <ScottyGrover at aol.com>; fastvair <fastvair at yahoogroups.com>
Cc: virtualvairs <virtualvairs at corvair.org>
Sent: Thu, Feb 2, 2012 5:11 pm
Subject: Re: <VV> Improving the heat conductivity of motor oil


And see how fast it wears your cam or other parts. There is a big
difference between a transformer where the oil is static versus our oil
which also provides a pressurized boundary layer in the bearings and
drip spray lube to cam lobes where high pressures in between the lobe
and lifter exist. Not to mention the wiping/compression strokes the
rings and cylinder walls experience! Mark Durham

Sent from my Windows Phone
From: ScottyGrover at aol.com
Sent: 2/2/2012 10:44
To: fastvair at yahoogroups.com
Cc: virtualvairs at corvair.org
Subject: <VV> Improving the heat conductivity of motor oil
_HBN  Boron Nitride Dry Lubrication Powders, 1lb test quantity now
available._
(http://sandblastingabrasives.com/hexagonal-boron-nitride-powder-order-page-781.html)

Why don't you experiment with this and find out if it helps in  cooling?

Scotty from Hollyweird
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