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17' 6MT ATS Carbon Black, 09' Malibu, 08' Infinity G35x, 04' Ion Redline,
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180 Posts
Discussion Starter · #1 ·
One of the the downfalls of having a Carbon Black Pack car is that it looks ready for the track but its really not. On top of that I really never liked the brakes They are extremely front biased and the pedal was always just "okay" the car has always stopped good however. After a track day and cooking the rears with all the nannys off I decided it was time to improve the look and functions of the rear. This is all just an GM parts bin raid but it works and fits well.

if any one wants help assembling their own kit shoot me an PM.
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2017 ATS Premium Luxury
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104 Posts
Very interested as well. Any adjustment needed to the AS module to account for changing the F/R bias?


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Registered
17' 6MT ATS Carbon Black, 09' Malibu, 08' Infinity G35x, 04' Ion Redline,
Joined
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180 Posts
Discussion Starter · #5 ·
Very interested as well. Any adjustment needed to the AS module to account for changing the F/R bias?


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DId you mean ABS? I highly dobut that it will I can confirm after my next track day. The abs on most newer cars is looking at wheel speed so I don't see an issue. Imho the factory rear brakes were undersized for the car and its weight. Instead of the cars brake bias being F:90 R:10 the car feels more like F:80 R:20 and doesn't just nose dive under hard breaking.

-This should help keep the fronts from doing to much work.

-Keep the rears from over heating

-Keep braking more consistent and reduced fade

- Lastly this opens up significantly more brake pad options for the rear. No one made a brake bad for the rear.
 

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2017 ATS Premium Luxury
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104 Posts
DId you mean ABS? I highly dobut that it will I can confirm after my next track day. The abs on most newer cars is looking at wheel speed so I don't see an issue. Imho the factory rear brakes were undersized for the car and its weight. Instead of the cars brake bias being F:90 R:10 the car feels more like F:80 R:20 and doesn't just nose dive under hard breaking.

-This should help keep the fronts from doing to much work.

-Keep the rears from over heating

-Keep braking more consistent and reduced fade

- Lastly this opens up significantly more brake pad options for the rear. No one made a brake bad for the rear.
Yeah, stupid phone autocorrect.

Older cars had physical proportioning valves to determine F/R brake bias, but many newer cars have it integrated with the ABS module and can change the bias through reprogramming. If you change the braking power on a given axle too much from stock by increasing swept area, rotor diameter, or clamping force, you’d have to make an adjustment to the brake bias to keep things balanced. If you don’t, you’ll likely see the rear brakes lock up more often, resulting in much more frequent ABS activation.


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17' 6MT ATS Carbon Black, 09' Malibu, 08' Infinity G35x, 04' Ion Redline,
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180 Posts
Discussion Starter · #7 · (Edited)
Yeah, stupid phone autocorrect.

Older cars had physical proportioning valves to determine F/R brake bias, but many newer cars have it integrated with the ABS module and can change the bias through reprogramming. If you change the braking power on a given axle too much from stock by increasing swept area, rotor diameter, or clamping force, you’d have to make an adjustment to the brake bias to keep things balanced. If you don’t, you’ll likely see the rear brakes lock up more often, resulting in much more frequent ABS activation.


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I highly doubt the ATS has a proportioning/metering valve whose bias is controlled by the ABS pump. However it is common practice to now integrate proportioning/metering valve into the ABS block but the bias is NOT changeable via programming.

I did a quick shake down on some B-roads over the weekend, and blew through half a tank in about 40 mins of driving. No rear lock up all, it considerably helped brake fade as well and I purposely got things nice and hot. I'm using street pads all the way around with front pads that don't like heat at all. I'll report back after dropping in my track pads for the track day on the 25th.
 

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2013 ATS Performance 2.0 6M
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36 Posts
I’m really liking the idea of this brake setup. I’ve just been doing Autocross where the brakes don’t really get too hot, but would like to get more into HPDE and track days soon.
 

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2013 ATS Performance 2.0 6M
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Oh, almost forgot, you have any idea what minimum wheel size is? I have a set of 18s but throw the stock 17s on sometimes for track days.
 

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17' 6MT ATS Carbon Black, 09' Malibu, 08' Infinity G35x, 04' Ion Redline,
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180 Posts
Discussion Starter · #10 ·
Oh, almost forgot, you have any idea what minimum wheel size is? I have a set of 18s but throw the stock 17s on sometimes for track days.
They will not clear the factory 17's maybe some others as you only need about a 1/4" more room
 
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