Ice mode solution?

cjwsrt6 · 05-25-2017, 09:45 PM

Few questions for you guys, the yaw switch, if done will this help out with the ice mode during straight braking? This is the only time I run into issues while autocrossing. I don't seem to remember it as bad when I was running 285/35/19 but when I went down to 275/35/18 it seems it locks up more on higher speed braking.
Stupid question but this does not turn off abs all together correct?

Rusty · 05-25-2017, 10:10 PM

Disabling the yaw sensor affects the VDC. It keeps the system from applying a rear brake caliper during cornering. Trying to straightening the car up. Which can be very unnerving.

It doesn't kill it completely thou. How disabling the yaw sensor affects ice mode. Far as I know. No one has brought that up before.

street2soul · 05-26-2017, 10:26 PM

Quote:

Originally Posted by cjwsrt6

Few questions for you guys, the yaw switch, if done will this help out with the ice mode during straight braking? This is the only time I run into issues while autocrossing. I don't seem to remember it as bad when I was running 285/35/19 but when I went down to 275/35/18 it seems it locks up more on higher speed braking.
Stupid question but this does not turn off abs all together correct?

ABS still works in straight line with yaw sensor pulled. However, this does not cure ICE mode completely, but it does somewhat alleviate excessive ABS intrusions during braking which leads many to believe that it somewhat "Cures" ice mode, but it doesnt. i ran into it past weekend and it scared me to death.

Tracer 09 · 09-23-2018, 08:36 PM

A couple of questions here read entire thread. Want to track car with no ABS to stay out of ice mode. Have had ice mode at autox with sport tech sport pads. Took fuse out for ABS and did some low speed test runs, under 50 and applied firm brake pressure and car rear wants to jump to right so car like what is stated is rear biased. Want if possible to stay away from proportioning valve so have some questions. Car set up is 305 square slicks, AST 4300 double adjustable shocks, 1200 front, 900 rear springs. Akebono sport brakes. Working now on brake ducts for both front and rear.

Has anyone got a track day pad set up that bias car so it can be ran without ABS? High temp rear low friction, high temp front medium friction?
Was a thinking about putting base brakes on rear, smaller rotor, single piston caliper less braking force, has anyone done this, was it sucessful?

Thanks

Rusty · 09-23-2018, 08:49 PM

Quote:

Originally Posted by Tracer 09

A couple of questions here read entire thread. Want to track car with no ABS to stay out of ice mode. Have had ice mode at autox with sport tech sport pads. Took fuse out for ABS and did some low speed test runs, under 50 and applied firm brake pressure and car rear wants to jump to right so car like what is stated is rear biased. Want if possible to stay away from proportioning valve so have some questions. Car set up is 305 square slicks, AST 4300 double adjustable shocks, 1200 front, 900 rear springs. Akebono sport brakes. Working now on brake ducts for both front and rear.

Has anyone got a track day pad set up that bias car so it can be ran without ABS? High temp rear low friction, high temp front medium friction?
Was a thinking about putting base brakes on rear, smaller rotor, single piston caliper less braking force, has anyone done this, was it sucessful?

Thanks

Most run the Carbtech's X10 front and X8 rear. A few run X12 front and X10 rear.

yaoxiao4 · 10-29-2018, 03:08 PM

I'm somewhat new to tracking in general
I'm running into an issue where I feel like ABS is kicking in waaaaay too early under heavy braking and I can feel the drumming in the wheels. Is that what's considered ICE mode?
Always end up seeing nasty marks on my rotors whenever that happens

My setup is RE-71Rs - XP10 - XP8

Rusty · 10-29-2018, 03:45 PM

Quote:

Originally Posted by yaoxiao4

I'm somewhat new to tracking in general
I'm running into an issue where I feel like ABS is kicking in waaaaay too early under heavy braking and I can feel the drumming in the wheels. Is that what's considered ICE mode?
Always end up seeing nasty marks on my rotors whenever that happens

My setup is RE-71Rs - XP10 - XP8

Ice Mode is when you have a solid brake pedal and no brakes.

Usually happens on entry with a bump to up step the ABS.

I have the same pad combo. On hard braking. It feels like the pads are chewing through the rotors, but they are not. Is that the drumming you're feeling? What rotors are you running?

yaoxiao4 · 10-29-2018, 04:07 PM

Quote:

Originally Posted by Rusty

Ice Mode is when you have a solid brake pedal and no brakes.

Usually happens on entry with a bump to up step the ABS.

I have the same pad combo. On hard braking. It feels like the pads are chewing through the rotors, but they are not. Is that the drumming you're feeling? What rotors are you running?

yeah it feels like somethings "pumping" against the rotors or something. Currently running Z1 2 piece front rotors and z1 perf rear rotors
I end up with pretty nasty marks on my rotors.

I'm thinking that maybe I'm just braking too hard, these carbotechs are like on-off switches unlike the club racers I'm running on the s2k

Elmo370z · 12-12-2019, 09:35 AM

Quote:

Originally Posted by yaoxiao4

yeah it feels like somethings "pumping" against the rotors or something. Currently running Z1 2 piece front rotors and z1 perf rear rotors
I end up with pretty nasty marks on my rotors.

I'm thinking that maybe I'm just braking too hard, these carbotechs are like on-off switches unlike the club racers I'm running on the s2k

Try winmax pads

MrPostman · 10-29-2018, 07:32 PM

Drumming feeling is most likely the ABS doing its thing, grip, release, grip, release, over and over very quickly.

yaoxiao4 · 10-30-2018, 12:17 PM

Quote:

Originally Posted by MrPostman

Drumming feeling is most likely the ABS doing its thing, grip, release, grip, release, over and over very quickly.

yup, that's what I'm thinking, but it's kicking in WAY too early, sometimes when I barely step on it

dts3 · 10-30-2018, 12:51 PM

There is a lot of info in this thread... I read through the first 5 or so pages and I have a question for everyone: Does this only happen around turns, or in complete straights? We write software for ABS modules, and lateral acceleration factors somewhat heavily into the algorithm. If this is an issue when primarily in the turns, I'm curious if disconnecting the yaw sensor would make this go away.

yaoxiao4 · 10-30-2018, 06:02 PM

Quote:

Originally Posted by dts3

There is a lot of info in this thread... I read through the first 5 or so pages and I have a question for everyone: Does this only happen around turns, or in complete straights? We write software for ABS modules, and lateral acceleration factors somewhat heavily into the algorithm. If this is an issue when primarily in the turns, I'm curious if disconnecting the yaw sensor would make this go away.

almost all of the HEAVY braking is done on the straight away

MrPostman · 11-01-2018, 11:54 AM

Quote:

Originally Posted by dts3

There is a lot of info in this thread... I read through the first 5 or so pages and I have a question for everyone: Does this only happen around turns, or in complete straights? We write software for ABS modules, and lateral acceleration factors somewhat heavily into the algorithm. If this is an issue when primarily in the turns, I'm curious if disconnecting the yaw sensor would make this go away.

Yep heavy braking done while the car is still straight, and trailing off going into the turn apex if braking late. Not sure if doing the yaw switch mod would alleviate this since the ABS sensors are still reading each individual wheel speed, and when you are braking into a turn the outside wheels are turning faster than the inside wheels. I'm sure the makes the algorithm a tad more complicated to write.

dts3 · 11-01-2018, 12:54 PM

Quote:

Originally Posted by MrPostman

Yep heavy braking done while the car is still straight, and trailing off going into the turn apex if braking late. Not sure if doing the yaw switch mod would alleviate this since the ABS sensors are still reading each individual wheel speed, and when you are braking into a turn the outside wheels are turning faster than the inside wheels. I'm sure the makes the algorithm a tad more complicated to write.

Sorry, I meant to say disabling the yaw sensor and the ABS as well.

05-25-2017, 10:10 PM	#2 (permalink)
Rusty A True Z Fanatic Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 70 Posts: 35,577 Drives: 2011 Nismo GM 6M Rep Power: 2684440	Disabling the yaw sensor affects the VDC. It keeps the system from applying a rear brake caliper during cornering. Trying to straightening the car up. Which can be very unnerving. It doesn't kill it completely thou. How disabling the yaw sensor affects ice mode. Far as I know. No one has brought that up before. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

09-23-2018, 08:36 PM	#4 (permalink)
Tracer 09 Base Member Join Date: Feb 2014 Location: Marion, iowa Posts: 21 Drives: 09 370z Sport Rep Power: 13	Track with no ABS A couple of questions here read entire thread. Want to track car with no ABS to stay out of ice mode. Have had ice mode at autox with sport tech sport pads. Took fuse out for ABS and did some low speed test runs, under 50 and applied firm brake pressure and car rear wants to jump to right so car like what is stated is rear biased. Want if possible to stay away from proportioning valve so have some questions. Car set up is 305 square slicks, AST 4300 double adjustable shocks, 1200 front, 900 rear springs. Akebono sport brakes. Working now on brake ducts for both front and rear. Has anyone got a track day pad set up that bias car so it can be ran without ABS? High temp rear low friction, high temp front medium friction? Was a thinking about putting base brakes on rear, smaller rotor, single piston caliper less braking force, has anyone done this, was it sucessful? Thanks

10-29-2018, 07:32 PM	#10 (permalink)
MrPostman Base Member Join Date: Jun 2018 Location: Alabama Age: 57 Posts: 41 Drives: 2010 Nissan 370Z M6 Rep Power: 9	Drumming feeling is most likely the ABS doing its thing, grip, release, grip, release, over and over very quickly. __________________ Life is short, don't waste your time driving something boring.....

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05-25-2017, 09:45 PM	#1 (permalink)
cjwsrt6 Enthusiast Member Join Date: Apr 2014 Location: Alabama Posts: 452 Drives: 2005 crossfire Srt6 Rep Power: 13	Few questions for you guys, the yaw switch, if done will this help out with the ice mode during straight braking? This is the only time I run into issues while autocrossing. I don't seem to remember it as bad when I was running 285/35/19 but when I went down to 275/35/18 it seems it locks up more on higher speed braking. Stupid question but this does not turn off abs all together correct?

10-29-2018, 03:08 PM	#6 (permalink)
yaoxiao4 Enthusiast Member Join Date: Feb 2017 Location: Bay Area Posts: 320 Drives: 13 370z Black M6 Rep Power: 10	I'm somewhat new to tracking in general I'm running into an issue where I feel like ABS is kicking in waaaaay too early under heavy braking and I can feel the drumming in the wheels. Is that what's considered ICE mode? Always end up seeing nasty marks on my rotors whenever that happens My setup is RE-71Rs - XP10 - XP8

10-30-2018, 12:51 PM	#12 (permalink)
dts3 Track Member Join Date: May 2018 Location: Farmington Hills, MI Posts: 599 Drives: 08 Expedition Rep Power: 6767	There is a lot of info in this thread... I read through the first 5 or so pages and I have a question for everyone: Does this only happen around turns, or in complete straights? We write software for ABS modules, and lateral acceleration factors somewhat heavily into the algorithm. If this is an issue when primarily in the turns, I'm curious if disconnecting the yaw sensor would make this go away.