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-   -   ECUTEK = Adjustable Traction Control (http://www.the370z.com/tuning/123723-ecutek-adjustable-traction-control.html)

Tractionless 04-09-2023 11:28 AM

Going to hit up Eugene about this tomorrow for my tune as well. Definitely want all the bells & whistles.

Waiting on AT launch control until I upgrade the flex plate and torque converter though.

DarkJak 04-10-2023 01:25 PM

Got some vids this weekend! I will be editing it and uploading to Youtube. Hopefully this evening.

So some more observations: 1st does not handle it well at all. The power gets shut off for 1-2 seconds like OEM. (ugh!)
2nd and up does well though! 2nd I can get it to reliably trigger at higher RPMs.
My theory from just observing behavior is that different methods of control are hit based on percent difference from current wheel speed vs target wheel speed. At low differences, we are getting less invasive cuts. At higher speed differences, I think it falls back to the OEM style of TC. This is in line with the strategies I've read into on fully aftermarket TC solutions. The difference in Ecutek vs motorsports style solutions seems to come down to polling rate.

DarkJak 04-11-2023 11:18 PM

2 Attachment(s)
EDIT:
Demo
https://www.youtube.com/watch?v=NN0nMI9tMI0


Found Ecutek's documentation on 370Z traction control. Looks like they have a traction control table that retards ignition timing for given wheel slip percent and engine RPM, as well as a table that multiples throttle (meant to be 0-1.0 multiplier) as well.

I'd love to be able to play around with this more myself because I think setting intervention at lower wheel slip angles would help a lot. A problem I'm seeing based of the example tables is there is not much resolution for single digit slip percentages. Without knowing what the table setup is, currently, I'd have a tough time tuning. Plus relying on Eugene or another tuner to make adjustments is a big barrier to testing and refining.


Quote:

Using Custom Maps it’s possible to create Traction Control maps that will reduce engine torque for a given wheel slip ratio%

You can find a Traction Control Example ROM in your 370z folder, see Section 5.7 for its location.



To create Traction Control we only need two Custom Maps, in the Example ROM we used maps D and E

Custom Map D – Ignition Timing Retard
X axis is Wheel Slip Ratio%
Y axis is Engine Speed
The Map Output will be added to the current ignition timing for a given Engine Speed and Wheel Slip Ratio


As the differential speed between front and rear wheel speed increase then more ignition retard is applied and the engine torque will be reduced, as the RPM increases the retard amount is increased further reducing engine torque avoiding the fuel cut rev limiter







Custom Map E – Throttle Multiplier
X axis is Wheel Slip Ratio%
Y axis is Engine Speed
The Map Output will multiply the current Throttle Target for a given Engine Speed and Wheel Slip Ratio


As the differential speed between front and rear wheel speed increases the throttle target will be reduced by the map output multiplier. Due to two large diameter throttle butterflies being fitted we need to significantly reduce the throttle opening amount at low RPM (low airspeed) for the closing throttle to actually achieve any worthwhile reduction in airflow and therefore engine torque





The Traction Control can be further enhanced with the addition weighting factors like vehicle speed, steering angle, G force lateral and rotational and we can even set up a dash mounted potentiometer and import the 0v - 5v signal to be used as an overall gain from the aggression of the feature

Spooler 04-12-2023 07:58 AM

Learn to drive without the Traction Control. Who needs it on a NA 370z.

Averying 04-12-2023 08:24 AM

Quote:

Originally Posted by Spooler (Post 4037549)
Learn to drive without the Traction Control. Who needs it on a NA 370z.


He’s not NA… lol


Sent from my iPhone using Tapatalk

Spooler 04-12-2023 10:03 AM

Quote:

Originally Posted by Averying (Post 4037551)
He’s not NA… lol


Sent from my iPhone using Tapatalk

That does not show in his signature. You don't really need a motorsport traction control until you get above 700whp. For a track car, you won't be running that much whp anyway due to heat management.

Elmo370z 04-12-2023 01:47 PM

http://www.youtube.com/watch?v=RzYdEJSiWfITuner here in Tampa has been doing this for the last 5 years. Pretty much every tuner is so far behind the curve. Safire hawk has been running the tc through custom
Maps for the last 3 or 4 years. I can attest how great it is on the track compared to one, you can’t even tell when TC engages while
On the track

Elmo370z 04-12-2023 01:48 PM

R.S. Entherpy

Elmo370z 04-12-2023 02:01 PM

I’ll be running this TC map through ECU tek once I get back
To the track. Only downside is you will run through rear brake
Pads

DarkJak 04-12-2023 11:26 PM

Ha, yeah, I don't really keep my sig up to date.
Car's now in the process of being tuned by Eugene with the Rotrex kit, and I've been having fun exploring the setup just around town.

Regardless of NA vs not, a well tuned TC setup is a great tool to have.
I think gatekeeping traction control usage is part of why TC development is so ignored. 370Z stock traction control is woefully bad. We should celebrate that Ecutek's control can get it to something closer to a modern car's TC, and apparently with enough tuning effort, have it feel invisible.

Elmo370z 04-13-2023 01:02 PM

Quote:

Originally Posted by DarkJak (Post 4037609)
Ha, yeah, I don't really keep my sig up to date.
Car's now in the process of being tuned by Eugene with the Rotrex kit, and I've been having fun exploring the setup just around town.

Regardless of NA vs not, a well tuned TC setup is a great tool to have.
I think gatekeeping traction control usage is part of why TC development is so ignored. 370Z stock traction control is woefully bad. We should celebrate that Ecutek's control can get it to something closer to a modern car's TC, and apparently with enough tuning effort, have it feel invisible.

Hasn’t been hidden away, most tuners don’t know anything or refuse to work with it. Of course if a tuner has figured it out they aren’t going to share. Safire hawk has been posting about this for years and it
Fell
On deaf ears.

Spooler 04-13-2023 07:09 PM

My suggestion would be to learn how to drive without it and then add in the future. It is a skill set that is invaluable to have. If you get into trouble, you will be able to save it instead of crashing the car. If you want to be hard headed and not listen, you can crash like other folks have done. You need your experience bucket to fill up before your luck bucket runs dry. That won't keep you from doing it but it will give you a fighting chance.

SS_Firehawk 04-16-2023 07:32 AM

Have a listen to the last part of this video about traction control.


http://www.youtube.com/watch?v=/96MB9_h2nRY


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