Nissan 370Z Forum

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-   -   Braking problem - malfunctioning ABS (http://www.the370z.com/brakes-suspension/3916-braking-problem-malfunctioning-abs.html)

ChrisSlicks 05-11-2010 01:49 PM

Quote:

Originally Posted by RCZ (Post 533009)
I wish we had some sort of "Track" button that would switch us to a more aggressive ABS tune. I'm pretty sure Ferrari has such a system implemented within their manetino steering wheel system, but that's why they are $250k.

Anyone ever heard of a way to reprogram your ABS parameters?

In other words, I hope we find something punctual that is specifically causing the ABS to go and remain in icemode, but I have a feeling its just the system doing its job in what it is programed to think is a "complete panic stop". I can guarantee you all that the guys with GT3's out there, who have a little bit more resources than most of us do, (I said most, congrats if that doesn't include you) would have found a fix for this already if it were a hardware malfunction.

I would like to think that the ABS could be reprogrammed, but I'm 99% sure that Nissan we never do this unless a flaw can be easily reproduced under street driving conditions, and that the flaw leads to several serious accidents.

Pretty much the only hope of a cheap fix is to locate the source of the triggers and do as much as possible to alleviate them.

At some point Nissan might release a Nissan Motorsports ABS unit for race cars, but it will probably be sold with a moderate price tag and a large "for track use only" warning. The later isn't a real issue for experienced drivers.

ChrisSlicks 05-11-2010 01:57 PM

Quote:

Originally Posted by RCZ (Post 533212)
I wish we could have real time monitoring of the brake temps. Maybe we could pinpoint a temperature that causes ABS failure.

Who's gonna do it?

This weekend I have an auto-x and will be taking careful temperature measurements of rotor, caliper and brake line both front and rear after every run using an infrared thermometer. This is about as close as we can get to realtime data. At the end of a run the brakes are at peak temperature and then you idle back to your hot pit at 5 mph giving the brakes no cooling on the way there.

AP - Chris_B 05-11-2010 02:07 PM

Quote:

Originally Posted by ChrisSlicks (Post 533198)
The most notable difference besides the calipers is that the rear rotor is much smaller in comparison to stock, reducing the rear bias the stock setup has just slightly.

Not exactly. Rotor size is not the only factor in determining brake bias as the caliper piston sizing has just as much to do with it. The AP Racing systems do not move the bias forward at all.

Chris

travisjb 05-11-2010 02:53 PM

Let's see what Chris comes back with...

If more is needed and if the group is willing to pony up contributions, I would run this sensor (Brake Disc Temperature Sensor) connected to my traqmate and start collecting data... we might be able to get away with only 1 corner... cost a few hundred bucks

RCZ 05-11-2010 03:34 PM

hmm...buy a toy for travis....I'll pitch in $30

gpa7pk 05-11-2010 03:50 PM

subscribed

daleks 05-11-2010 04:01 PM

Quote:

Originally Posted by ChrisSlicks (Post 533198)
It's a possibility. But in this case it would be the stock BBK (small BBK?) that was misapplied. Has anyone with base brakes experienced ice-mode?

Simply by having 'ice mode' doesn't imply a misapplied ABS situation. My point was that by having a misapplied aftermarket BBK may be making the standard situation, which is expected, worse.

ChrisSlicks 05-11-2010 04:08 PM

Quote:

Originally Posted by daleks (Post 533431)
Simply by having 'ice mode' doesn't imply a misapplied ABS situation. My point was that by having a misapplied aftermarket BBK may be making the standard situation, which is expected, worse.

In my case it got better, but there are other BBK kits that didn't fair as well.

AutoX Z 05-11-2010 05:21 PM

Quote:

Originally Posted by RCZ (Post 532871)
^ Sounds like fade? Maybe you glazed the pad?

Sorry to go offtopic folks, but I want to get in on the fun too. Where are you all buying your Carbotech pads at?

No it wasn't brake fade. The brakes were fine all day and the amount of pedal travel/effort required to stop the car never changed the ABS just started engaging well before it should have. What doesn't make sense to me is if it was a straight programing problem the ABS would go into ice-mode from the first stop. The fact that it also seems to be temperature related is very puzzling

gpa7pk 05-11-2010 05:34 PM

Quote:

Originally Posted by RCZ (Post 532871)
^ Sounds like fade? Maybe you glazed the pad?

Sorry to go offtopic folks, but I want to get in on the fun too. Where are you all buying your Carbotech pads at?

Go directly to Carbotech - Carbo Tech, Inc.* - they have our pads in stock, can offer a pad bedding service so that you just install their pads and go (I haven't installed mine yet). They are very responsive with fast and reasonable shipping.

sig11 05-11-2010 05:42 PM

Quote:

Originally Posted by gpa7pk (Post 533583)
Go directly to Carbotech - Carbo Tech, Inc.* - they have our pads in stock, can offer a pad bedding service so that you just install their pads and go (I haven't installed mine yet). They are very responsive with fast and reasonable shipping.

I think you mean Carbotech Performance Brakes :)

cossie1600 05-11-2010 05:45 PM

THMotorsports has it at like a 5 or 10% discount, they just drop ship theirs I think.

RCZ 05-11-2010 05:53 PM

^ thanks, but I have a feeling you got the website wrong. I got the right one though. Here it is for anyone else interested.
http://www.ctbrakes.com/pads.asp?Make=Nissan

XP10 all around or XP10 front /XP8 rear?

I appreciate the help folks.

spearfish25 05-11-2010 06:53 PM

Quote:

Originally Posted by RCZ (Post 533618)
^ thanks, but I have a feeling you got the website wrong. I got the right one though. Here it is for anyone else interested.
Carbotech Performance Brakes: Products-Nissan Brake Pads & Shoes

XP10 all around or XP10 front /XP8 rear?

I appreciate the help folks.

Got mine from Carbotech directly too. Went with XP10 front/ XP8 rear.

I've been using them on the street as well due to laziness and reluctance to swap. I notice the rear rotors are hotter than the front after aggressive drives. I'd be reluctant to go with XP10 rear.

daleks 05-11-2010 07:21 PM

TiSpeed Titanium Brake Backing Plate Heat Shield Shims Improve Your Braking Performance

What backing plates are people using? If any? I'd be curious to see if these made any difference. Supposedly it keeps the heat transfer between the pad and rotor (thus fluid) at a minimum.


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