[Fot] Oil temp

[tr4racing at googlemail.com]

Hi,

 

that is a close to death temperature where the oil starts to suffer and ages.

It indicates friction inside the engine somewhere. Many times it is rod or crank bearings that cause high oil temperature, when things start to go wrong.

 

Infrared temperature sensors:

There are things to know about them to measure correctly:

1.	They work like a photo camera, they have an objective aperture – in most cases a wide angle objective 1/20 or 1/12 = means 1” away measures a surface of 20” or 12”!!!
2.	The laser point is NOT the spot you’re measure, it is only the direction you measure
3.	If you want to spot measure something, get as close as possible to that spot as you can….if the surface is not too hot, touch it with the sensor
4.	Metallic surfaces give wrong readings, cause by the Maxwell theorem. Means, your readings will be too low. To compensate this problem, paint the metallic surface or of that is not possible, put a peace of tape (any color) and spot measure on this tape snippet.

 

Cheers

Chris

 

 

Von: Fot <fot-bounces at autox.team.net> Im Auftrag von dustin nicholson via Fot
Gesendet: Mittwoch, 25. August 2021 18:47
An: FOT Triumph <fot at autox.team.net>
Betreff: [Fot] Oil temp

 

Amici,

 

I'm sorting out a new to me race car and don't like that the oil temperature gauge reads around 290 degrees.  I've never had an oil temp gauge on previous cars so I'm not sure what's normal (240?) but 290 seems high to me.  Yes?

 

More temp info:  Air temp is near 100 degrees.  Water temp is steady 185 degrees.  Big aluminum radiator with electric fan.  No oil cooler.  Oil temp sensor is in the aluminum finned oil pan.  IR temp gun says the outside of the pan is 170 degrees.  Maybe the oil temp gauge is wrong?  I wouldn't expect such a big difference between the outside of the pan and the oil temp.

 

Engine info:  mild engine, stock compression, fast road cam (270 is my guess), supercharger with the medium size pully, pump gas

 

Maybe I'm worrying about nothing.  I just know that racing in 2 weeks at Eagles Canyon in Texas is going to be hot and I want to make it through the weekend.

 

Thanks,

 

Dusty Nicholson

1955 TR3 #72

1957 TR3 #43

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/fot/attachments/20210826/d1105a41/attachment-0003.htm>