Dr.Speedfellow

Hi,
I did a search and found kind of spotty references to trans temps for the mct.
It seems an obd2 Bluetooth module and torque app allow one to keep an eye on trans temps, hopefully accurately.

I was wondering if anyone had watched the trans temps particularly during 20 min track sessions, or similar circumstances and what temps you were seeing

Some of my old cars had a pretty hard rule of thumb that if trans temp got over 240deg it likely caused damage, per the trans experts that built the trannies.

Some of my track day opportunities will have 3 20min sessions and some others have up to 7, with an hour or more between runs.

I have read a few references here on the forum about the mcts getting grumpy after just a few sessions, so I want to keep an eye on the temps.

please advise if obd adapter and torque app is best temp data available. My car came with an icarsoft scanner but I haven't seen trans temp on there yet so I was going to order and obd Bluetooth to work with whichever app works best for trans temp on my android phone..trans temp at track will be my main use of app and obd2 module.

Also is the weistec trans pan with additional rear mount trans cooler+fan the best long term fix to keep mct happy during track days? I did see the blocker plate thread but wondered if that would be necessary if an extra cooler was added.

I live in a warm climate where ambient temp.is likely to be mid 70s lowest and low 90s highest depending on season.

Thanks so much for any help

roadkillrob

Almost positive icarsoft will do it, I have a foxwell and it does it - here are the instructions for the icarsoft, you have to go into the trans module and then monitor the real time data.

Dr.Speedfellow

Thank you very much for that, Roadkill. I will look deeper in icarsoft, could give me a good idea of normal operating temps and could plug it in after sessions to check temp.
I guess the best setup would be a wireless app that let's me log the trans temp during a session and look at the progression afterwards, does anyone know if any apps can accomplish that?

roadkillrob

I am pretty sure torque will show you but I have not tried myself.

Edit from another forum

Here are the Informations from Torque.
Transmission Oil Temperature PID that works 100% right for Mercedes W204:

PID: 2130
Min. 0.0
Max. 200.0
Scaling factor: x1
Device type: Celsius
Equation: L-50
OBD Header: 7E1

BLKROKT

Torque will show it. Ask @Jasonoff

Jasonoff

Anyone know the PID info for Oil Temp?

I can confirm this is correct.

Below is my custom RaceChronoPro channel that I use at the track to display and log.

Dr.Speedfellow

Thank you. Does RaceChrono communicate directly with the obd2 module or is torque app somehow still involved in that setup?

Jasonoff

Direct to an OBDII Bluetooth device. I am using the OBDLink MX+ and a Garmin GLO2 external GPS which samples at 10Hz.

Jasonoff

Here's a quick example of the logging when you have OBDII and GPS data.

The below vid gets speed and gforce from GPS, RPM and throttle position from OBDII. Although the throttle position seems to be a bit flakey.


Below is a snip of the analysis you can dig through.
Yellow = Intake Temp
Blue = Coolant Temp
Purple = Transmission Temp

Dr.Speedfellow

That is awesome Jasonoff. Thanks it is very helpful. Between gopro, lap transponder, trans temp, etc I was starting to feel like my driving was going getting lost in sorting out the tech, lol.
the video is great, kind of everything i am looking for in one place

The obdmx+ is exactly what I ordered.👍

Does the camera have to be specific to Racechrono or does a gopro work?

What type of GPS unit have you integrated into that?

You drive it hard, I assume you have addressed the trans cooling and maybe the oil cooler in your car too? I couldn't make out the trans temp in the analysis photo.

Thx again for all the info. Sorry for all the questions. Just getting started in tracking the c63.

Jasonoff

No, you just copy the video to your phone and sync it in the app after. I'm still using the Garmin dashcam I had it it when it was my daily driver. Gopro videos apparently have some sort of autosync feature you can use.

Garmin GLO2

It's trailered only track car. I made updates all season but I believe all the cooling is sorted now. A larger dual pass front oil cooler, an extra hole cut through the bumper cover/beam, the front grill mostly gutted to allow more air into the cooler array, and 2 louvered vents over the headers.

The trans temp in that video maxed at 105°C but I have seen it get up to 115°C on a hot day. I will be doing the weistec pan to see if it helps but to be honest I'm not even sure what temp range is safe. I plan to change the pan trans fluid often.

Dr.Speedfellow

I plugged in the values for torque app PID 2130 as posted by roadkillrob. Any idea if these lower sections need filling out or can be left as is?

Dr.Speedfellow

Ok a bit of an update here.

On Tuesday I had my first track day in the car and had 3 full 25 minute sessions. I flogged the car hard and had no ill effects. No limp mode, no strange or grumpy acting transmission issues. Engine oil temp topped at 244°F in the 3rd session for a short time and water/coolant temp was fine and stable the whole time. I had not received my obdmx+ yet so I was not able to keep an eye on trans temps. But I will have track days with more than 3 sessions so I would very much like to watch trans temps. If I have to I will use my icarsoft next time, but with the cord, display unit and location of odb port it would be a bit inconvenient while slinging the car hard around a road course so wireless Bluetooth module seems a better option.

the obdmx+ showed up yesterday, so today I plugged it in and connected it to the Torque Pro app. The PID I entered for trans temp per RoadKillRob did not work. I entered it as shown in this thread and elsewhere and it read -51°C the whole time. So I did another display of Transmission Temp method 1 as listed in the 'add a display' options in the Torque App and it seemed to show reasonable readings of low 170s F to high 180s when driving normally, and 190s to low 200s when sitting at stop lights or being stopped after driving with high temp readings of 204.8°F-206.6°F when sitting with no airflow after driving for 20min on an 80° day.

These readings on Trans temp method 1 in the Torque app seem reasonable, but most people say the torque app trans readings don't work and you have to display the Custom PID trans temp display. My experience seems to be the opposite as the PID i tried to enter read -51°C the whole time and the Torque app TransTemp method 1 display showed reasonable temp readings for the conditions.
now I very well may have entered the PID incorrectly as there were a few more entry options on the PID page than what was listed by Roadkillrob and others elsewhere on the web.
so can I trust the torque app trans temp method 1 reading and ditch the PID?

Can anyone screenshot their entire PID entry page so I can see what to put for the other entry points or if to leave them blank?

Below, "trans temp" is what I named the custom PID I tried to enter and Transmission Temperature method 1 and method 2 were part of the torque app options. As you see in the pic below my 'trans temp' PID was only showing-51°C and Transmission Temperature method 2 never showed a value, but Transmission Temperature method 1 showed what seemed like reasonable readings the whole time.




That is a pic of the trans temp options from the 'add a display' page in torque app and below is a shot of the high trans temp after sitting still for a couple minutes via the trans temp method 1 display and a shot of the -51° PID display



Thanks for any help

Jasonoff

I don't see the parameter identifier number set in your setup screenshot.

The values roadkillrob posted are correct.

Dr.Speedfellow

I am sure i made an error somewhere, thx for the reply.

Here are my PID settings from the custom PID page. Could it be as simple as i need a space between 21 and 30 in the first entry?

Also can I change the max value and change celsius to Fahrenheit on the PID page without hurting anything, if we get it to work?

Any idea why trans temp method 1 seems to be working? Is it just inaccurate?

Jasonoff

Did you set your unit type to °C?

Dr.Speedfellow

I did in the PID setup page. But I did not change any overall settings in torque app.

Do my PID and 7E1 value need to look like yours do in your racechrono, i.e. 0x 7E1 and 0x 21 30?

Dr.Speedfellow

When I added a predefined set of pids instead of just my custom one, it loaded a Chrysler 2130 trans temp pid. So maybe that will solve my issue

Dr.Speedfellow

Will test trans temp on app again tomorrow.

Does anyone know what temp the trans has to hit to go into limp mode?

Jasonoff

I haven't used the Torque app in a long time but I had it working fine with what rob posted. No, for torque you don't need to specify the full hex value.

Those preloaded chrysler ones didn't work for me. Showed the wrong value.

IIRC the WIS specified <=120°C so I assume if you go over 120°C it will trigger limp mode.

It's something like 135°C engine oil temp to trigger limp mode.

Dr.Speedfellow

Thanks Jasonoff,

I looked at the PID values on the Chrysler 2130 and it had all the same stuff in the same fields as my custom one. So I made a display page with the Chrysler 2130 pid and my custom 2130 pid so I can compare the two, I will try to get them to work tomorrow. I had 'celsius' spelled out like showed in Rob's post, so I changed it to '°C' to see if that works. That is what the Chrysler 2130 has.
120°C = 248F which makes sense, my old street strip cars with built transmissions i was told by the trans builders that over 240 was too.high for the fluid to work properly.

Thx again

Dr.Speedfellow

Still no luck today. When I click 'test' at the bottom of the edit pid page it shows this.

Dr.Speedfellow

I think I will ditch the Torque app, download racechrono and try to copy Jasonoff's gearbox temp setup there

Dr.Speedfellow

Hey Jasonoff,

I used this exact setup in racechrono pro and it wouldn't show a value in the display. Did you have to enable any other settings in racechrono for gearbox temp to work?

Thx a lot

Jasonoff

Did you add it to slow channels?