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

[Jerry Van Vlack]

Interesting discussion, I have a mildly warmed up TR4A street car. D cam, 87mm, .100 milled head and lightened flywheel. No oil cooler but I do use the larger capacity aluminum oil pan. My issue is getting the oil hot enough. Stock radiator with a Richard Good radiator shroud. Even at highway speeds my oil does not get much above 180 / 190 when ambient temperatures are below 75 degrees. 180 degree thermostat installed. Driving around town the oil never gets above 180. Ambient temperatures above 75 allows the oil to get to 220 at highway speeds. I guess I could go to a higher degree thermostat but I’d risk overheating in street traffic. I have an electric fan set to come on at 190. 
Any suggestion on how to get the oil hotter? I run 20W/50 Brad Penn oil.
JVV

From: van.mulders.marcel--- via Fot 
Sent: Friday, December 7, 2018 7:06 AM 
To: Joe Boruch 
Cc: fot 
Subject: Re: [Fot] Was: Oil Cooler or Oil filter first? Now how to IDflow outt he adapter?

Agree that the oil is important for engine cooling , although 40% seems a lot : where could the engine oil loose all that heat, (with what medium could the oil exchange that amount of heat) especially when there is no oil cooler? At the risk of being pedant : Probably oil and water are not complementary in engine cooling: the water takes away the combustion heat in the first place, the oil takes away the heat caused by friction  (heat from the bearings especially). If the water T° gets too high, the engine will boil and an oil radiator will not cure that. If the oil T° gets too hot, the bearings can fail and an oil cooler is the obvious cure, not a bigger coolant radiator. Only to explain that I believe there is no need for an oil cooler with its complications if the oil T° is low enough without one.
Marcel

--------------------------------------------------------------------------------

Van: "Joe Boruch" <jaboruch at netzero.net>
Aan: "van mulders marcel" <van.mulders.marcel at telenet.be>
Cc: "Rocky Entriken" <rocky at spitfire4.com>, "fot" <fot at autox.team.net>
Verzonden: Vrijdag 7 december 2018 03:36:00
Onderwerp: Re: [Fot] Was: Oil Cooler or Oil filter first? Now how to ID flow        outt        he adapter?


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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