Ice mode solution?

cossie1600

The StarSpec should be a world better than the V12s.

Red__Zed

No doubt. The star specs are an amazing tire. I wish they made them in bigger sizes though.

cossie1600

Yeah, I am still pissed off they don't make it for our cars. I think they grip a little less than the RE11, but they feel better.

flashburn

Yeah, I'm sure. I took them out for a quick test drive this weekend, and they felt really good. I really liked running a square setup too, felt very precise.

Now hopefully I can somehow manage to avoid ice mode again.

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Current Ride: 2012 Chevrolet Corvette Grand Sport Centennial Edition Carbon Flash 6M
Previous Ride: 2009 Nissan 370Z Sport Platinum Graphite 7AT

Shamu

I suspect the car and driver magazine accident was caused by ice mode and not pad failure. I was at the track for past three days and ice mode was activating almost every hard braking turn. It was scary as heck. Suspect if you aren't having issues your not aggressively braking.

I ended up disconnecting the abs fuse which Nissan put in a cluster of 3 fuses. The car with my monster front brakes had a slight rear bias. That rear bias may be the issue. If you are skilled with non abs braking that is cheapest fix.

Honestly I don't want to experience ice mode ever and I don't think pad changes are going to eliminate the issue. I may go with very expensive alternate abs system made for competition later on.

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Grant

ChrisSlicks

Anyone think a proportioning valve may be a viable option? Disable the ABS, dial in the bias to your liking and then re-enable ABS.

Do you have a proportioning valve Travis or did you dial in the bias with pads only?

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Hotchkis ARB | Stillen CAI | Art Pipes | Berk CBE | Stillen AP Racing Brakes | AE Performance Oil Cooler | BC Racing ER Coilovers | Doran Control Arms

flashburn

What front brakes are you running?

Also what pads are you using?

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Current Ride: 2012 Chevrolet Corvette Grand Sport Centennial Edition Carbon Flash 6M
Previous Ride: 2009 Nissan 370Z Sport Platinum Graphite 7AT

cossie1600

the added bonus of removing the fuse is disabling the abls right?

car and driver boiled their pads and fluids, it has nothing to do with ice mode. even with ice mode, the car would eventually calm down and slow the car. they went into the wal with lthe pedal sunk to the floor

travisjb

Chris, to answer your question, I'm managing the balance with pads, and relative front-rear ride height, tire pressure and damper settings... patch-work at best... the real solution is unfortunately as Grant says - expensive aftermarket competition ABS computer... alternatively, if someone knows an engineer at Bosch or really really smart hacker maybe we can get some help mod'ing the stock ABS computer

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Red__Zed

Hm. I wonder how difficult it would be to mess around with the ABS unit. I've not checked to see details on it at all-- anybody know what we are working with in the stock unit?

ResIpsa

So you are saying that you were experiencing ice mode at the track before pulling the abs fuse? And after pulling the fuse, without any other modification to the brakes, you never experienced ice mode again?

If the answer is yes to both questions this really throws a wrench into my theory that ice mode was only related to heat buildup boiling the brake fluid. In my Z, I have completely cured (or I thought) ice mode by upgrading to CarboTech XP10/8 pads, Castrol SRF brake fluid, and brake ducts. Mind you that I run at Summit Point which has only two heavy brake events both under 125 mph.

My problem with the abs theory on this forum was that all the posts seemed to be speculation. I had never seen (or read) any real substantive evidence pointing to the abs. However, if pulling the fuse completely cured the problem this seems to be the first substantive repeatable evidence that there are some gremlins in the abs system.

I think you may have ruined my day…

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ChrisSlicks

I still standby that it is heat related. The heat in the front is either affecting the brake balance or in some other way affecting the ABS system. At auto-x if I spray down the front brakes after each run (yes I know this is very bad) then I don't get ice-mode at all, if I let them ride then I get spontaneous ice mode once the rotors get above 300F (post run measurement).

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Hotchkis ARB | Stillen CAI | Art Pipes | Berk CBE | Stillen AP Racing Brakes | AE Performance Oil Cooler | BC Racing ER Coilovers | Doran Control Arms

boardkat

carbotech AX6 in the front, stock pad in the rear? would something like that work for autox? or is there enough heat building up in the pad that an XP8 front and AX6 rear might do the trick? in my solstice, i run AX6 front, XP8 rear, since the bias is slightly forward (and there is no funky brake assist/abs computer programming), but my understanding is that it's the opposite in the 370. i love the moderate initial bite (compared to RS4 and HP+ pads) and linear braking characteristics of the CT's, and the amount of heat they can handle!

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'09 Pontiac Solstice GXP Coupe - RIP
'82 Reynard FF1600 || CM/70
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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.

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Grant

cossie1600

I don't think heat is a primary factor too, but heat seems to create a havoc with me where the car would pull to one side under braking. I got the ice mode at VIR, but not at the Glen. I still believe it is mainly because of the bumps over at T1