Temperature valve “tuning” - MVAgusta.net
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post #1 of 16 (permalink) Old 03-04-2019, 07:53 PM Thread Starter
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Temperature valve “tuning”

I had made some changes in my bike to solve the temperature issue. Now my bike is like a supersport bike, it runs hot but does not melt 😂
However I will do one last modification, one I did on my classic car and it works wonderful. I will replace the temperature valve for one that will send the signal to the ECU when the temperature is at 80 degrees. I did not do it because my dealer did not have one equal to mine with a different termical spec.
Has anyone tried this?

Best Regards,
Luis Miguel
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post #2 of 16 (permalink) Old 03-05-2019, 05:18 AM
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What folks, including me, have done is tune the ECU so that it sends a signal to turn the fans on earlier.

The other thing that helps immensely is to tune the ignition tables.

What have you done?

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post #3 of 16 (permalink) Old 03-05-2019, 05:34 AM Thread Starter
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Originally Posted by silentservice703 View Post
What folks, including me, have done is tune the ECU so that it sends a signal to turn the fans on earlier.

The other thing that helps immensely is to tune the ignition tables.

What have you done?
I have different radiators, metal fans, silicon tubes, upgrade jet prime water pump. Power commander V but no ignition tables mix. But now the bike runs hot but normal.

Best Regards,
Luis Miguel
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post #4 of 16 (permalink) Old 03-05-2019, 06:00 AM
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The existing engine coolant temperature sensors tell the ECU what temperature the engine is..... your idea of a new sensor isn't going to change anything, as the ECU and the dash see temperature in real time.

To have the fans come on at a lower temp will require changes in the ECU.

Or are you talking about a thermostat that opens earlier??? That won't change anything either.

I used to be fast....now I just dream about it.
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post #5 of 16 (permalink) Old 03-05-2019, 06:02 AM
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Quote:
Originally Posted by lmmperalt View Post
I have different radiators, metal fans, silicon tubes, upgrade jet prime water pump. Power commander V but no ignition tables mix. But now the bike runs hot but normal.

What do you consider "normal"? What is your reference?

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post #6 of 16 (permalink) Old 03-05-2019, 01:22 PM Thread Starter
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Originally Posted by esq'z me View Post
The existing engine coolant temperature sensors tell the ECU what temperature the engine is..... your idea of a new sensor isn't going to change anything, as the ECU and the dash see temperature in real time.

To have the fans come on at a lower temp will require changes in the ECU.

Or are you talking about a thermostat that opens earlier??? That won't change anything either.
The temperature on the dash is given by one sensor. The other sensor sends a signal to the ECU and the ECU puts the fans on. In the 1078RR there are 2 sensors. This solution was implemented in my Maserati Biturbo. Now the fans start to work at 80 degrees. So it is a tested solution in my car. Let’s see in the bike. The ECU is “stupid” it just receives the signal from the sensor. If the signal arrives earlier the fans will start earlier.

Best Regards,
Luis Miguel
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post #7 of 16 (permalink) Old 03-05-2019, 01:24 PM Thread Starter
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Quote:
Originally Posted by silentservice703 View Post
Quote:
Originally Posted by lmmperalt View Post
I have different radiators, metal fans, silicon tubes, upgrade jet prime water pump. Power commander V but no ignition tables mix. But now the bike runs hot but normal.

What do you consider "normal"? What is your reference?
Normal for me is the average temperature of an R bike. City between 90/100, open roads 75/85. Stop at the signal with more than 27 degrees outside 100/110.

Best Regards,
Luis Miguel
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post #8 of 16 (permalink) Old 03-05-2019, 01:39 PM
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That is what mine runs and all I did was tune the A/F mix and the ignition tables as well as drop the initiating temperature for fan start.

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post #9 of 16 (permalink) Old 03-05-2019, 02:31 PM
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Quote:
Originally Posted by lmmperalt View Post
The temperature on the dash is given by one sensor. The other sensor sends a signal to the ECU and the ECU puts the fans on. In the 1078RR there are 2 sensors. This solution was implemented in my Maserati Biturbo. Now the fans start to work at 80 degrees. So it is a tested solution in my car. Let’s see in the bike. The ECU is “stupid” it just receives the signal from the sensor. If the signal arrives earlier the fans will start earlier.
The 2 sensors are actually the same type device.

On my 910R and others of that generation (and I think your 1078) the sensors are combined into one part, located in the cylinder head. Earlier models had 2 separate sensors. Regardless, one sends the signal to the dash and the other sends the signal to the ECU as you noted.....

But the ECU is reading the actual engine coolant temperature. The sensor is not a "switch". The ECU is using this info to change fueling with engine temps (think about warming up...more fuel when cold).

The ECU knows when the engine reaches the temp for fans on and when it cools to the temp for fans off. It is getting this constantly changing signal from the temp sensor.

Your Maserati reference has nothing to do with how the sensors and ECU on your MV function. You will have to instruct the ECU to turn on the fans sooner.

By the way...100C is a normal operating temp for most modern sport bikes.
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post #10 of 16 (permalink) Old 03-05-2019, 02:35 PM Thread Starter
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That is what mine runs and all I did was tune the A/F mix and the ignition tables as well as drop the initiating temperature for fan start.
Ok. You do not live in Portugal and the temperature is completely different. Now my bike runs always under 100 degrees, even stoped in traffic

Best Regards,
Luis Miguel
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