Water Pump

[pk2]

Originally Posted by JFP in PA

The problem is your methodology; you are not measuring the actual temperature of the flowing oil, you are measuring the outside metal of the sump using and indirect (non contact) method…………..there is no way your oil is circulating at 188F if you are running the OEM stat……………The M96’s coolant is pulling heat out of the oil once the engine is up to operating temperature, the oil typically is running 20-30F higher than the coolant…………………….

JFP in PA,

Working on a rebuttal. Have dyslexia but good. Takes forever to write something legible.

You make some good points but I think I have you on a few. To one point, you might look-up "digital laser pyrometer" on Wikipedia or wiki-answers (for simple answer).

Regards, PK

[JFP in PA]

Originally Posted by pk2

JFP in PA,

To one point, you might look-up "digital laser pyrometer" on Wikipedia or wiki-answers (for simple answer).

Regards, PK

Actually, as I already own two of them, a look up is not required, I know how they work, and their level of accuracy..................

[pk2]

Originally Posted by JFP in PA

Actually, as I already own two of them, a look up is not required,

Ya I guess not, ... perfect. You just saved me about an hour and a half trying to explain and key in what it's all about.

So, with this one, Ive measured quite a few different materials (including my head, including aluminum) and from different distances in different ambient environments etc. pretty accurately (used a standard scientific thermometer to verify a few). At the Lab I've seen them take pretty precise measurements at at least 1400 degrees. The only thing I can't measure is flame.

Since all it it sees is infared (IR), not the material or you or me, and the IR is all the same no matter where it comes from, and all it does is measure the intensity iradience) of the IR. Why do you think it can't accurately read the temp of this particular aluminum alloy of the sump?

Listen, I really appreciate you humoring me and sticking around. I think I just have one more thing that doesn't quite compute for me, and then I'll leave you alone.

It's sounding like this may be a genuine good thing.

Regards, PK

[JFP in PA]

I’m sure that the infra red pyrometer is measuring the surface within its stated limit of accuracy; that said, the thermally conductive outside of a casting is not an accurate reading of the circulating oil or coolant. If you want to accurately monitor them, you need to have probes immersed in the actual fluid while it is circulating; and not trying to interpret the fluid temps by inference from the outside of the casting.

Accurate, and closely tested temperature gauges attached to the M96 with their probes inserted into the fluids while running consistently show much higher temps than you see on the outside with a non contact pyrometer, often 35-45 degrees F higher, even at the surface of the oil cooler. We have collected data off of multiple M96 engines in this manner, and have never seen a non contact unit get even close to the actual temperatures. So, no, I do not trust or believe in non contact measurement as being anything more than an inference or presumption of the actual operational temperatures of the fluids…….