Short Oil sending unit

[aviationfred]

When I installed my Oil Temperature Gauge. It came with a short sending unit. It did not extend beyond the oil galley plug. I believe much of the actual temp reading was from the crank case itself. I found a longer sending unit and have now installed it. We will see if there is a significant difference in the oil temp readings.


Fred

[Bones]

Be interesting to see if there is any difference Fred. I originally fitted an analogue temp gauge but replaced it with a digital one recently because the old one was all faded from the sun and always got foggy after washing the bike. I didn't bother replacing the sender unit because both gauges read basically the same temp values (40-150 deg) and figured it should read the same, which by the way it does.

A pic of the gauge.

[MOTOMYSZOR]

I don't think that You will notice any difference in temperature. Maybe oil has less contact with short probe - but for me it can only cause small delay in read changes....

Anyway I wait for results 

[fj1289]

Fred - is that a one wire or two wire sending unit?

[aviationfred]

Fred - is that a one wire or two wire sending unit?

It is a single wire

Fred

[Alf]

I checked my new digital gauge with my now old crankcase cap thermometer. Both read the same when working temperature is reached. Meanwhile the digital gauge read higher temperature sooner than the crankcase cap one, and when you stop the digital read higher until the bike is cold. But it is logical, and say a lot from the basic design of the crankcase cap thermometer

But now I don't have to appart the attention from the road to control the oil temperature

I hope the results too, Fred 

[aviationfred]

An initial ride report. I did a 20 minute ride last night and a 15 minute ride this morning.

Last nights ride was in very light city traffic, OAT was around 70*F, and speed was no more than 45 mph. This mornings ride was about 15 minutes, light city traffic, OAT around 65*F, and speed no more than 55 mph.

On last nights ride, I tried to ride in one gear lower than normal, to intentionally induce more heat.

My first thoughts are that there is about a 30*F temperature drop over the short temp sender.

I have a 240 mile ride planned for Saturday and a 200 mile ride planned for Sunday. I will monitor the temps on the longer higher speed rides.

Fred

[racerrad8]

An initial ride report. I did a 20 minute ride last night and a 15 minute ride this morning.

Last nights ride was in very light city traffic, OAT was around 70*F, and speed was no more than 45 mph. This mornings ride was about 15 minutes, light city traffic, OAT around 65*F, and speed no more than 55 mph.

On last nights ride, I tried to ride in one gear lower than normal, to intentionally induce more heat.

My first thoughts are that there is about a 30*F temperature drop over the short temp sender.

I have a 240 mile ride planned for Saturday and a 200 mile ride planned for Sunday. I will monitor the temps on the longer higher speed rides.

Fred

Fred,

Did you confirm the ohm value of the replacement sender to the original sender?

Randy - RPM

[aviationfred]

Randy,

I will check the ohm readings later this afternoon.

Fred

[aviationfred]

I actually bought a second oil sender because the resistance readings were not close between the original short sender and the new long high match sender. The low match sender's resistance was also way different than the original sender.

While at work today, I remembered that my multimeter at home has the capacity to read temperature. 

I rode the bike about 40 miles and once home, put it on the center stand. I zip tied the thermal couple to my flexible mechanical fingers and used the oil fill port to insert the thermal couple down in the oil. After about 5 minutes, the temps were close with a 4 degree difference.

Fred

[Alf]

I checked my new digital gauge with my now old crankcase cap thermometer. Both read the same when working temperature is reached. Meanwhile the digital gauge read higher temperature sooner than the crankcase cap one, and when you stop the digital read higher until the bike is cold. But it is logical, and say a lot from the basic design of the crankcase cap thermometer

But now I don't have to appart the attention from the road to control the oil temperature

I hope the results too, Fred 

Similar to your test, Fred. Thank you for testing 

[Bones]

Fred, do you think there is any difference in temp readings now between the original short sender and the new long one.

[aviationfred]

Fred, do you think there is any difference in temp readings now between the original short sender and the new long one.

Yes.... There is about a 30 degree temperature drop using the longer oil sender probe.

Fred

[Bones]

Yep ok, I did read that in an earlier post, just when you said you changed senders because the resistance was different l wasn't sure if that made any difference on final temp readings. All good

[aviationfred]

I see that I may have led to some confusion. I left the first long oil sender in and manually checked the oil temp.

Fred