DIY: Track Mode on 2013-2016 cars

[Mike_ZN6]

I see there is a separate part number for the ABS pump assembly on Brembo equipped cars.

Non-Brembo ABS Pump: SU003-0796

Brembo ABS Pump: SU003-07912

Does anyone know if there is actually any difference? I am inclined to think probably not because people swap PP Brembos onto their cars with no issues. I have not heard any reports of traction control behaving strangely after swapping to PP Brembos.

[churchx]

There also might be case of not thoroughly testing in all possible scenarios and never driving in way where differences may show up, or "testing" only via imprecise feel of butt dyno, hence not reporting issues.

[norcalpb]

Originally Posted by Mike_ZN6

I see there is a separate part number for the ABS pump assembly on Brembo equipped cars.

Non-Brembo ABS Pump: SU003-0796

Brembo ABS Pump: SU003-07912

Does anyone know if there is actually any difference? I am inclined to think probably not because people swap PP Brembos onto their cars with no issues. I have not heard any reports of traction control behaving strangely after swapping to PP Brembos.

I have the Brembo module on my 2013 and don’t think it’s causing issues, but I do get some brake shaking on the track. I think that’s due to the crazy build up I have on my rotors though.

[Mike_ZN6]

Originally Posted by churchx

There also might be case of not thoroughly testing in all possible scenarios and never driving in way where differences may show up, or "testing" only via imprecise feel of butt dyno, hence not reporting issues.

This is also a possibility. I am not sure how to determine what the differences between the Brembo and Non-Brembo ABS modules are.

I wonder if all BBKs may be causing strange traction control behavior?

It seems the price of the 2017+ ABS modules has really increased. The cheapest I can find is about $300. The cheapest Brembo ABS module is like $500. I was planning to do this conversion soon, but I think I should probably wait until I can get a better answer on the differences in the ABS modules (and possibly wait until I can do a PP Brembo swap at the same time).

[Mike_ZN6]

Originally Posted by norcalpb

I have the Brembo module on my 2013 and don’t think it’s causing issues, but I do get some brake shaking on the track. I think that’s due to the crazy build up I have on my rotors though.

That is good to hear. There might not be any actual practical difference between the Brembo and Non-Brembo modules. I know the Brembos use different size pistons.

[jflogerzi]

I noticed this part number 27536CA030 gives a date code of 16 on some examples vs 17. Would this work or does it need to be 17 and above? Also if I buy one used we just care about the Module. The Pump part itself we don't need but it seems its sold together.


EDIT** If I would read the thread I would know just need the plastic part...

Edit 2** What the difference between the new track mode on the MY 17s and the pedal dance on my13-16s

[churchx]

"MY2017 track mode" is enhanced "VSC Sport" on older ones. Higher slip angle allowed, less abrupt engagement.
Pedal dance (on all twins, including MY2017) = all nannies off, except basic ABS.

[Mike_ZN6]

I managed to get my hands on two different ABS modules from part outs on FB. Both came from 2018 BRZs, but one came from a tS equipped with Brembo brakes. Both ABS pumps have the same serial number (27536CA050).

I noticed in the Subaru parts catalog there are actually three different part numbers listed for the manual BRZ: one for cars with STi (tS/Brembo/Michelin Pilot Sport 4S), one for cars with all season tires, and one for the normal OEM tires. This leads me to believe there may actually be slightly different programming in the VSC modules that is appropriately tuned for the varying grip levels of the tires that come equipped on the different models. I am not sure if Toyota would do that because it would cause VSC to behave incorrectly if you ever changed the type of tires on the car. This negates my theory that the different part numbers had different VSC tuning to accommodate different size calipers/pistons.


Part Numbers



Brembo(Left) vs Non-Brembo(Right)



Brembo ABS Pump



Brembo VSC Module



Non-Brembo ABS Pump



Non-Brembo VSC Module

[solidONE]

Interesting.. Do you plan on running and testing both out?

[gpvecchi]

Yes there are actually 3 types for BRZ. They are related to rims size and caliper types. I can confirm that VSC has a different calibration for PP and STi models (less intrusive).

[Mike_ZN6]

Originally Posted by solidONE

Interesting.. Do you plan on running and testing both out?

I wasn't planning to, but I guess I could. Any suggestions on a relatively controlled method to test the different modules?

[solidONE]

Originally Posted by Mike_ZN6

I wasn't planning to, but I guess I could. Any suggestions on a relatively controlled method to test the different modules?

Repeat the same exact turn somewhere? Log the speed and steering angle and see when TC gets triggered?



Or do what I did, and go on a familiar back road and see how often the computer intervenes? Ala butt dyno? It's too bad there isn't a way to log the VSC activity.

[timurrrr]

Originally Posted by solidONE

It's too bad there isn't a way to log the VSC activity.

It should be possible to log those things from the CAN bus, but might require some reverse engineering first.

[Compelica]

Originally Posted by solidONE

Repeat the same exact turn somewhere? Log the speed and steering angle and see when TC gets triggered?



Or do what I did, and go on a familiar back road and see how often the computer intervenes? Ala butt dyno? It's too bad there isn't a way to log the VSC activity.

You can thru the extended OBD2 PIDs, but they are nowhere as fast or instant as reading from CAN.