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Braking problem - malfunctioning ABS

Well they are completely different driving styles... You can tell immediately when someone who does auto-x goes to the track because their driving is very abrupt and violent vs someone

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Old 04-06-2010, 11:29 AM   #106 (permalink)
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Well they are completely different driving styles... You can tell immediately when someone who does auto-x goes to the track because their driving is very abrupt and violent vs someone who tracks and is smooth. People who track their car never slam on the brakes, it has to be gradual because of the higher speeds/ loads.

My icemode on the track happened at the end of a long braking zone though...I never went into ABS until I got ice mode

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Old 04-06-2010, 12:49 PM   #107 (permalink)
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I am a road track guy so I am used to the 120-60 braking and I havent had ice mode in those type conditions... only in conditions where the car needs to stop at zero and that is only every now and then on certain road conditions.
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Old 04-06-2010, 01:33 PM   #108 (permalink)
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Found this on the StopTech FAQ page and it seems to apply here.

StopTech : Balanced Brake Upgrades
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Old 04-06-2010, 02:04 PM   #109 (permalink)
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Originally Posted by daleks View Post
Found this on the StopTech FAQ page and it seems to apply here.

StopTech : Balanced Brake Upgrades
Interesting. It helps to explain what's going on when this happens braking into a turn. But it doesn't explain why it happens when braking in a straight line. (Just making an observation, not knocking the FAQ or anything.)
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Old 04-06-2010, 02:06 PM   #110 (permalink)
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good read but not the same thing...

What we are refering to is straight line braking. What that FAQ was talking about was corner entry braking or trail braking...
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Old 04-06-2010, 02:07 PM   #111 (permalink)
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DAM you Ben always one step ahead!
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Old 04-06-2010, 02:28 PM   #112 (permalink)
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DAM you Ben always one step ahead!
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Old 04-06-2010, 02:33 PM   #113 (permalink)
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Originally Posted by spearfish25 View Post
When I first installed the Carbotechs, every brake stop would activate the ice mode. On the track yesterday, more progressive braking didn't get a single icing incident (thank God). However, I was definitely not diving into corners given my apprehension for icing and just rolling right off the track. Every time ABS came on, I started to pucker and thought I was about to get ice'd. It sucks not being able to fully trust your brakes.
I'm in the same situation. It really sucks when you can't trust your breaks on the track. when ever I want to do a hot lap and start diving in to corners, the ABS start kicking in and this grinding sound comes on (it sounds like the pads are grinding the disc).

I haven't expiration an ice mode yet. But if we can prevent the ABC from kicking in,That will be nice.

Edit: this only happens when the car is diving in to the corner(trail break), and not in a straight line.
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Old 04-06-2010, 02:40 PM   #114 (permalink)
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Ironically the car does really well braking mid corner while unbalanced, it just can't brake in a straight line in certain conditions.
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Old 04-06-2010, 02:48 PM   #115 (permalink)
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Originally Posted by RCZ View Post
My icemode on the track happened at the end of a long braking zone though...I never went into ABS until I got ice mode
I think you got pad fade. Pad fade seems to really freak the ABS out because the rear brakes are working but the front brakes aren't at full capacity. End result is the ice-mode behavior but for different reasons.

As I recall you haven't had it since upgrading to track pads correct?
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Old 04-06-2010, 05:39 PM   #116 (permalink)
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I haven't been to the track in a while so I'm not running upgraded pads at this time. I will be soon though if I don't get that S/C.
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Old 04-06-2010, 06:20 PM   #117 (permalink)
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I am not to familiar with the 370z braking system yet but if the ABS functions anything like it does in my current and previous car, then if the car sense's that you are at a "high load of lateral force with out applying throttle it will initiate the brakes early, what i read in the OP was that you experiencing the abs activate when you are on the brake about 50% or less are you corner braking? Not to bash in anyway i noticed i did it a couple times and the ABS kicked in, i new i braked to late for a corner and it messed me all up, and i quickly learned to brake a second earlier and keep even on the throttle until you are ready to mash it again.

In my GTI and the current A4 the both do it, it is to makes sure they stop the situation from getting out of control, also keeping the throttle open and even or consistent tells the computer you are doing what you need to do, and doesn't allow the ABS to kick in.

Sorry for skipping the stuff in the middle, and jumping to the end but if anything i hope this is somewhat beneficial.
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Old 04-20-2010, 04:03 PM   #118 (permalink)
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Default Ice Mode At Summit Point Main

I experienced the dreaded ice mode three times at the NASA Spring Slam on the Summit Point Main Circuit. I am running stock sport wheels with 265/35/19 front and 305/30/19 rear RE-11's. I was also running a custom made set of Porterfield R4 full race compounds (they are awful, noisy, grabby, hard to modulate, dirty...wanna buy my set cheap?) Here are my observations.

The ice mode always happened at the very end of large braking events (turn one and turn five) just before turn in. Before going into ice mode there was no perceivable warning.

It always happened when I came in to the braking zone too fast and needed to sharply increase braking force right before the corner.

By the end of my second day I could pretty much predict when my Z was going to go into ice mode.

Although the ice mode felt like there was no braking force being applied, my 370Z was still slowing.
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Old 04-20-2010, 04:49 PM   #119 (permalink)
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Sounds like you were getting pad fade, which certainly does trigger the ice-mode in these cars. Despite the large rotors the heat seems to build up very quickly and there isn't adequate ventilation to dissipate it. But the real problem is something in the programming of the ABS controller isn't quite right, and when you do start to get a little bit of pad fade it steps in and makes things a whole lot worse.

I was getting some ice-mode myself the pass weekend at an auto-cross event. Conditions were pretty treacherous to start with, 40 degrees, drizzle, damp track. Everything started out fine, grip levels were obviously a little lower due to the conditions. But once the front brakes got up to a fairly average 400F I started to get some ice-mode behavior in the 5th, 6th and 7th runs of each session. An yes, this is with the Stillen AP Racing BBK installed.

I'm really beginning to wish that we could use the ABS controller out of the previous gen cars (350/G35) as I don't recall having an ABS issue in those.
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Old 05-04-2010, 10:57 AM   #120 (permalink)
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The Porsche guys are experiencing the same thing even in the GT3's. Some have gone to a BMW ABS system that cures the problem. The only problem with that is.... it's 10K

Driving style or braking style seems to be the issue according to a response I received. It doesn't have to do with pads, brake fade etc. If someone would pm me their email address I will forward the response to this issue and perhaps it can be posted here.

To be continued...
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