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The oiling system provides a significant amount of engine cooling. It h=
as 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. Mayb=
e the oil cooler was compensating for an inadequate radiator, but it wor=
ked. In my TR3 I often see oil temps over 220 deg F. When pushing it ha=
rd the oil will get up around 280. I have 2 oil coolers, one on each si=
de 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 r=
obbing horsepower. I have heard that NASCAR engines are always running o=
il 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 hel=
p. Hot oil is a good thing. Cool oil or excessively hot oil is not goo=
d. Joe(B)
From: "van.mulders.marcel--- via Fot" <fot@autox.team.net>
To: Rocky Entriken <rocky@spitfire4.com>
Cc: fot <fot@autox.team.net>
Subject: Re: [Fot] Was: Oil Cooler or Oil filter first? Now how to ID fl=
ow 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=C2=B0 was always low, less tha=
n 100=C2=B0C/212=C2=B0F. In 2010, to get my car nearer the minimum weigh=
t, I removed the oil cooler and I'm racing always without the cooler sin=
ce then.Can't say that the oil T=C2=B0 is higher without the cooler, ma=
ybe a little bit, but still always lower than 100=C2=B0C , even after 1 =
hour races. I'd like to have the oil T=C2=B0 a bit higher! So I believe=
most Triumph TR 4 cyl cars don't need an oil cooler at all, maybe the =
oil T=C2=B0 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 eng=
ines, but I think the modern oils have a rather easy life in it.Marcel
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<html><div>The oiling system provides a significant amount of engine coo=
ling. It has been a while since I have read the statistic, but I s=
eem to recall it accounts for about 40% of the engine's cooling. W=
hen 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 anothe=
r overheating issue. Maybe the oil cooler was compensating for an =
inadequate radiator, but it worked.</div><div> </div><div>In my TR3=
I often see oil temps over 220 deg F. When pushing it hard the oi=
l will get up around 280. I have 2 oil coolers, one on each side o=
f the radiator. Oil temp is measured in the pan. </div>=
<div> </div><div>Modern race oils can take temps over 300 deg F wit=
hout a problem. Oil that is too cold can lead to moisture accumula=
tions and sludge build up, in addition to robbing horsepower. I have hea=
rd that NASCAR engines are always running oil over 300 deg. So whe=
ther 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 go=
od thing. Cool oil or excessively hot oil is not good. Joe(B=
)</div><div><br><br><br>From: "van.mulders.marcel--- via Fot" <fot@au=
tox.team.net><br>To: Rocky Entriken <rocky@spitfire4.com><br>Cc=
: fot <fot@autox.team.net><br>Subject: Re: [Fot] Was: Oil Cooler o=
r Oil filter first? Now how to ID flow outthe adapter?<br>Date: Thu, 6 D=
ec 2018 12:02:07 +0100 (CET)<br><br></div><div>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 re=
moved the oil cooler and I'm racing always without the cooler since then=
.</div><div>Can't say that the oil T° is higher without=
the cooler, maybe a little bit, but still always lower than 100Â&=
deg;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 bearin=
gs 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. Ab=
out 80 bhp / litre is a lot for our old engines, but I think the modern =
oils have a rather easy life in it.</div><div>Marcel</div></html>
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://www.team.net/pipermail/fot
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