Ice mode solution?

travisjb

I recall reading somewhere else today that there are no real experts posting on forums b/c they are all off doing what they do... well we have at least one here, so thanks RB for your thoughts!

(once I get a working engine!) I'm going to look into getting a proper proportioning valve setup... it'll be interesting to see what we learn about this issue by modulating bias

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2009 370Z #104
*For Sale*

cossie1600

I am with RB that I have just learned to accept the flaw and move away from the "hotspots" where I know the car will get into ice mode most of the time.

I still believe the 350Z I had didn't have the same problem as my 370 and Corvette is because I was riding on the smaller single piston caliper. Despite having nearly the same power, the 350 just didn't have the stopping power to lock up my RA1s where the Corvette and 370Z could. I have to look at the datalog to see exactly how many Gs as it happened.

I can say that whatever spots I hit ice mode with in the Corvette, I did the same exact thing in the 370.

travisjb

Interesting... on the site it says the controller is an extra $6K, however, so likely it ends up being $10K as well

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2009 370Z #104
*For Sale*

Shamu

I wrote them. They indicated harness works with e46 m3 that uses same bosch system so if you could find an m3 parts car you could pull system but what is likelihood of this.

I think ATE system is what grand am team used. So I wonder if ate makes full system?

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Grant

wstar

Well what that site offers could amount to a complete ATE system for this car as well, but yes it does come out around 10K if you're not putting it in an appropriate BMW that already has some of the parts (sensors, etc) installed.

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7AT Track Car!
Journal thread / Car setup details

Mike

So, in my C6 and this car, this really hasn't been an issue for me. I wonder why? I'm not the fastest out there, but far from the slowest. I run stoptech ST60 front and ST42 rear trophy calipers with equal compound pads front and rear. My only problem is getting more than a couple days out of a set of XP12s on the fronts.

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travisjb

Okay there's one vote for equal compound pads...

Mike, do the braking zones at your most frequented tracks have bumps or anything that would unsettle the rear? Also, do you tend to brake straight line only or use trail braking at all?

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2009 370Z #104
*For Sale*

SPOHN

I run on XP 8's at all four corners with sport brakes and haven't had this issue at all. That's why I'm so interested in this thread. I've only done three track days. Two at Road Atlanta which has about three hard brake zones which none have bumps or anything that would upset the car as you said. I do brake hard and late and thats all in a straight line myself but no trail braking as of yet. Haven't reach that skill level yet.

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cossie1600

Mike, what did u run on your c6 for brakes?

for me, ice mode usually happena at the initial brake contact, not under trail braking.

I run the same compound on the 350 rx8 370 and c6, I think the xp10 have too mich bote for non slicks

wstar

For comparison with the icing I was seeing this past weekend (also XP8x4 and stock calipers, can't be far from Spohn's overall setup, except perhaps in rotor heat capacity / cooling), my most common (only actually) track surface is in fact quite ripply and bumpy, and notably so in the one section where I first had the major ice-mode problem.

In that section the weight transfer is not only heavy to the front from the braking itself, but is also heavy to the right from having just barely completely a fast left sweep before getting into the brakes. There's also a decent chance that during that initial problem stop, I hadn't quite finished rotating the car to its new straight-line direction before jumping into the brakes, by a scant few degrees. I'll probably know better once I have all the video processed.

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7AT Track Car!
Journal thread / Car setup details

SPOHN

Also my LSD helps aid in slowing being it locks at 50% during braking. Might not be a factor but I thought I'd throw that in there.

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wstar

And Spohn, if I could offer any advice from this past weekend, it's this: if you ever do feel like the brakes just didn't work when when you asked them to, lift and reapply/modulate to regain power, don't panic and keep your foot in the brake pedal hard like I did

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7AT Track Car!
Journal thread / Car setup details

SPOHN

Yea I did know that. That's why I'm so into this problem with you guys. That way if it ever happens it will be in my head. I know a lot of you guys have this issue not sure Mike and myself haven't experienced it before. Especially Mike. He has lots of track days and on about three different brake setups at that.

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clintfocus

alright, so do you guys think me running DTC60 up front and stock compound in back on a street tired stock suspension 370 is a ok idea, or just bad to begin with? Im running buttonwillow this sunday, if you guys think i should get a pad for the back with a little more bite, ill figure out how in the next few days, but if not im going to leave the stocks in the rear. This is the first time tracking my 370, so thats why im asking you guys, but i do have alot of track experience, so my pace will most likely not be slow. let me know what you guys think

ChrisSlicks

Doesn't make much difference, just means that the rear wheels are tied together to the drive shaft and engine braking effect will be distributed more evenly to the rear wheels. The stock VLSD unit will have a similar effect just not as strong, but in a straight line this isn't a huge factor.

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