Ice mode solution?

ChrisSlicks · 05-04-2011, 08:48 PM

Quote:

Originally Posted by Shamu

I don't think so. I had ice mode into first turns with no heat in brakes, had ice mode mid session and late session. My brakes are Brembo competition calipers with huge floating rotors. No over heating.

No balance issue when we disconnected abs. Nothing but solid pedal and awesome braking force.

I had same ice issues with sport brakes, sport rotors and stop tech pads. Used only good Motul fluid and stainless lines. Pedal to the floor and no brake force

I'm still going to try to hook up abs and work on things but honestly my system without abs is balanced and takes a lot to get wheel lock up.

And I still say car and driver experienced ice mode regarless of what was reported.

You likely changed the brake balance when installing the competition calipers to something that made sense for a non-abs race setup, however you seriously would have upset the ABS controller by altering the stock brake bias. In a sense you caused the ice-mode yourself by shifting the braking bias to something the ABS computer isn't programmed to handle.

With the stock setup if your pedal went to the floor then it was hydraulic brake fade due to overheating the caliper and boiling the fluid. I experienced that with the stock setup as well.

cossie1600 · 05-04-2011, 11:51 PM

Here is an easy to tell the difference between ice mode and brake fade.

Brake fade=pedal goes straight to the floor with no braking power
Ice mode=pedal sometimes goes straight to the floor, but you will hear the ABS pulsating. You cant really miss it.

ChrisSlicks · 05-05-2011, 08:13 AM

Quote:

Originally Posted by cossie1600

Here is an easy to tell the difference between ice mode and brake fade.

Brake fade=pedal goes straight to the floor with no braking power
Ice mode=pedal sometimes goes straight to the floor, but you will hear the ABS pulsating. You cant really miss it.

If your pedal goes to the floor you have brake fade, whether the ABS pulses or not. If the ABS is pulsing at the same time then you were probably locking up the rear brakes as a result of the fronts failing.

The annoying ice-mode occurs when you haven't overheated the brakes yet and the pedal stays rock solid. To me this only occurs after the brakes have warmed up and been heat soaked for at least 10-15 minutes.

cossie1600 · 05-05-2011, 09:22 AM

Quote:

Originally Posted by ChrisSlicks

If your pedal goes to the floor you have brake fade, whether the ABS pulses or not. If the ABS is pulsing at the same time then you were probably locking up the rear brakes as a result of the fronts failing.

The annoying ice-mode occurs when you haven't overheated the brakes yet and the pedal stays rock solid. To me this only occurs after the brakes have warmed up and been heat soaked for at least 10-15 minutes.

From what I remember, I have had instances where the pedal went slightly softer and the ABS just pulsate.

ChrisSlicks · 05-05-2011, 10:53 AM

Quote:

Originally Posted by cossie1600

From what I remember, I have had instances where the pedal went slightly softer and the ABS just pulsate.

Sounds like front pad fade, the first indicator the brakes are overheating. What pads were you using at the time?

cossie1600 · 05-05-2011, 11:46 AM

i cant fade the front brakes in an autox that we dont reach 40mph and the runs are 28 secs long...

ChrisSlicks · 05-05-2011, 12:00 PM

Quote:

Originally Posted by cossie1600

i cant fade the front brakes in an autox that we dont reach 40mph and the runs are 28 secs long...

LOL, fair enough.

AutoX Z · 05-05-2011, 06:26 PM

Whenever I hit "ice mode" the pedal is hard as a rock. It maybe moves 30% then is solid with the ABS going and almost no braking force.

Ruff · 05-06-2011, 12:46 AM

Quote:

Originally Posted by AutoX Z

Whenever I hit "ice mode" the pedal is hard as a rock. It maybe moves 30% then is solid with the ABS going and almost no braking force.

Same thing as in the 350Z.

Pedal going soft and further then usual, is boiled fluid...

cossie1600 · 05-06-2011, 01:22 AM

Quote:

Originally Posted by ChrisSlicks

LOL, fair enough.

I can't even boil water in a lot this small

YouTube - 0511 370z autox

spearfish25 · 05-06-2011, 08:41 AM

With track pads, I can make ice mode happen at will. All you have to do is stomp the brakes as hard as you can. The ABS will come on, the pedal will be rock solid, and the car will initially bite and then braking force goes to $hit. If I keep constant hard pressure, the car bites and lets go, bites and lets go...until I'm stopped. Stopping in the autoX stop box is embarrassing.

tyler20c · 05-06-2011, 05:22 PM

Two questions- could someone potentially experience ice mode during a panic stop on the street? and how the hell has nissan not gotten sued over this yet?

ChrisSlicks · 05-06-2011, 05:34 PM

Quote:

Originally Posted by tyler20c

Two questions- could someone potentially experience ice mode during a panic stop on the street? and how the hell has nissan not gotten sued over this yet?

It can happen on the street, but I could only reproduce it on the street after thoroughly heating up the brakes with lots of hard deliberate braking and then driving around casually for 10 minutes. It seems unlikely on the street, but with the right conditions I suppose it could happen.

spearfish25 · 05-06-2011, 05:38 PM

I'm convinced I had ice mode during my accident in December. Only caveat was that I was on ice.

Shamu · 05-10-2011, 04:18 PM

Id be intersted to see if another 370Z could brake as well as my car in braking zone with my ABS off. I can threshold brake with minimum of lock up and never have to deal with ice mode or even overly aggressive abs mode on fast deep braking zones. I know I couldnt come close with my abs system on. I'm an aggresive and deep braker but I am smooth as I dont lock up my tires or unsettle the car even with abs off.

For me a poorly designed abs system like the stock system on the 370Z is worse than no abs with a skilled driver when your on a track that requires threshold braking from high speeds

05-05-2011, 06:26 PM	#68 (permalink)
AutoX Z Enthusiast Member Join Date: Jun 2009 Location: Houston, Tx Posts: 314 Drives: 370Z Base, Sport Rep Power: 16	Whenever I hit "ice mode" the pedal is hard as a rock. It maybe moves 30% then is solid with the ABS going and almost no braking force. __________________ 2013 SCCA Solo National Champion VVV For Sale VVV

05-06-2011, 08:41 AM	#71 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1856	With track pads, I can make ice mode happen at will. All you have to do is stomp the brakes as hard as you can. The ABS will come on, the pedal will be rock solid, and the car will initially bite and then braking force goes to $hit. If I keep constant hard pressure, the car bites and lets go, bites and lets go...until I'm stopped. Stopping in the autoX stop box is embarrassing. __________________ 2013 Cadillac V-Wagon, RIP Z

05-06-2011, 05:38 PM	#74 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1856	I'm convinced I had ice mode during my accident in December. Only caveat was that I was on ice. __________________ 2013 Cadillac V-Wagon, RIP Z

05-10-2011, 04:18 PM	#75 (permalink)
Shamu A True Z Fanatic Join Date: Jan 2011 Location: Nor Cal Posts: 1,059 Drives: 370Z Racecar Rep Power: 19	Id be intersted to see if another 370Z could brake as well as my car in braking zone with my ABS off. I can threshold brake with minimum of lock up and never have to deal with ice mode or even overly aggressive abs mode on fast deep braking zones. I know I couldnt come close with my abs system on. I'm an aggresive and deep braker but I am smooth as I dont lock up my tires or unsettle the car even with abs off. For me a poorly designed abs system like the stock system on the 370Z is worse than no abs with a skilled driver when your on a track that requires threshold braking from high speeds __________________ Grant

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05-04-2011, 11:51 PM	#62 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	Here is an easy to tell the difference between ice mode and brake fade. Brake fade=pedal goes straight to the floor with no braking power Ice mode=pedal sometimes goes straight to the floor, but you will hear the ABS pulsating. You cant really miss it.

05-05-2011, 11:46 AM	#66 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	i cant fade the front brakes in an autox that we dont reach 40mph and the runs are 28 secs long...

05-06-2011, 05:22 PM	#72 (permalink)
tyler20c Base Member Join Date: Dec 2010 Location: Tampa Posts: 174 Drives: G37 Rep Power: 15	Two questions- could someone potentially experience ice mode during a panic stop on the street? and how the hell has nissan not gotten sued over this yet?