[Fot] Was: Oil Cooler or Oil filter first? Now how to ID flow outt he adapter?

[Joe Boruch]

The oiling system provides a significant amount of engine cooling.  It has been a while since I have read the statistic, but I seem to recall it accounts for about 40% of the engine's cooling.  When I first raced my 1296+ Spitfire, it did not have an oil cooler, and it was overheating.  I installed an oil cooler and never had another overheating issue.  Maybe the oil cooler was compensating for an inadequate radiator, but it worked. In my TR3 I often see oil temps over 220 deg F.  When pushing it hard the oil will get up around 280.  I have 2 oil coolers, one on each side of the radiator.  Oil temp is measured in the pan.   Modern race oils can take temps over 300 deg F without a problem.  Oil that is too cold can lead to moisture accumulations and sludge build up, in addition to robbing horsepower. I have heard that NASCAR engines are always running oil over 300 deg.  So whether your engine needs a cooler depends on what oil temps you see on the track and if your cooling system needs some help.  Hot oil is a good thing.  Cool oil or excessively hot oil is not good.  Joe(B)


From: "van.mulders.marcel--- via Fot" <fot at autox.team.net>
To: Rocky Entriken <rocky at spitfire4.com>
Cc: fot <fot at autox.team.net>
Subject: Re: [Fot] Was: Oil Cooler or Oil filter first? Now how to ID flow outthe adapter?
Date: Thu, 6 Dec 2018 12:02:07 +0100 (CET)

When starting road racing (circuit racing) I had an oil cooler in my car just like about everyone else. The oil T° was always low, less than 100°C/212°F. In 2010, to get my car nearer the minimum weight, I removed the oil cooler and I'm racing always without the cooler since then.Can't say that the oil T°  is higher without the cooler, maybe a little bit, but still always lower than 100°C , even after 1 hour races. I'd like to have the oil T° a bit higher!  So I believe most Triumph TR 4 cyl  cars don't need an oil cooler at all, maybe the oil T° is remaining too low in sprint races. There are only 3 main bearings and 4 big end bearings to heat the oil by friction. Compared to a modern engine, the oil isn't heated up much by the distribition parts and in the cylinder head. About 80 bhp / litre is a lot for our old engines, but I think the modern oils have a rather easy life in it.Marcel
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