mid-ohio crash
#101
Registered User
iTrader: (51)
more reason to remove the ABS, check this out
from david dirks
"Here is my in-car video from the Championship race:
http://vimeo.com/50910095
Some highlights:
10:30 Pass #1 by Jeremy, which was not shown in the Speedcasttv coverage.
20:30 Pass attempt by Pete, where we both played chicken late braking into T2. My ABS kicked in and I played in the sandbox for a while...
27:12 ABS kicked in again at the same spot, and I subsequently used a CMC car to slow me down. Pete took advantage of that and passed on the inside. Also not shown in the Speedcasttv coverage."
from david dirks
"Here is my in-car video from the Championship race:
http://vimeo.com/50910095
Some highlights:
10:30 Pass #1 by Jeremy, which was not shown in the Speedcasttv coverage.
20:30 Pass attempt by Pete, where we both played chicken late braking into T2. My ABS kicked in and I played in the sandbox for a while...
27:12 ABS kicked in again at the same spot, and I subsequently used a CMC car to slow me down. Pete took advantage of that and passed on the inside. Also not shown in the Speedcasttv coverage."
#103
350Z-holic
iTrader: (46)
more reason to remove the ABS, check this out
from david dirks
"Here is my in-car video from the Championship race:
http://vimeo.com/50910095
Some highlights:
10:30 Pass #1 by Jeremy, which was not shown in the Speedcasttv coverage.
20:30 Pass attempt by Pete, where we both played chicken late braking into T2. My ABS kicked in and I played in the sandbox for a while...
27:12 ABS kicked in again at the same spot, and I subsequently used a CMC car to slow me down. Pete took advantage of that and passed on the inside. Also not shown in the Speedcasttv coverage."
from david dirks
"Here is my in-car video from the Championship race:
http://vimeo.com/50910095
Some highlights:
10:30 Pass #1 by Jeremy, which was not shown in the Speedcasttv coverage.
20:30 Pass attempt by Pete, where we both played chicken late braking into T2. My ABS kicked in and I played in the sandbox for a while...
27:12 ABS kicked in again at the same spot, and I subsequently used a CMC car to slow me down. Pete took advantage of that and passed on the inside. Also not shown in the Speedcasttv coverage."
I hear a slipping clutch (or foot) as well. Listen at 26:32 - 26:39
- Fresh fluid for Saturday practice/qual/race and Sunday practice/qual
- Fresh fluid for Sunday race, then hoping for it to last the next Sat P/Q/R and Su P/Q
Last edited by scotts300; 10-08-2012 at 03:22 PM.
#105
All this talk about ABS is timely.
Was at the track today and had an ABS issue. Of course it happened at the worst place on the track - after 4 into 5a at Mosport. Basically 190kph into a hairpin, with next to no runoff.
Fortunately, I had a passenger and was taking it pretty easy - but that also scared me because the braking was pretty easy and shouldn't have locked up. A relatively easy catch but it spooked me pretty bad. Couldn't figure out why it happened. After getting back to the pits to try figure out the problem i noticed the abs light was on, then I remembered this thread.
The rear lockup was just like when I've pulled the abs fuse, only then I'm ready for it. I've driven that corner over 500 times and the bias has been 100% realiable until now. Didn't get a chance to read the code (my laptop was dead) and the light cleared once I hit the kill switch to try and clear it.
I guess I'll make it part of my pre-flight to check for an abs code but now I wonder if I should go abs delete. Don't really want that kind of unexpected lockup when I'm really on it.
Was at the track today and had an ABS issue. Of course it happened at the worst place on the track - after 4 into 5a at Mosport. Basically 190kph into a hairpin, with next to no runoff.
Fortunately, I had a passenger and was taking it pretty easy - but that also scared me because the braking was pretty easy and shouldn't have locked up. A relatively easy catch but it spooked me pretty bad. Couldn't figure out why it happened. After getting back to the pits to try figure out the problem i noticed the abs light was on, then I remembered this thread.
The rear lockup was just like when I've pulled the abs fuse, only then I'm ready for it. I've driven that corner over 500 times and the bias has been 100% realiable until now. Didn't get a chance to read the code (my laptop was dead) and the light cleared once I hit the kill switch to try and clear it.
I guess I'll make it part of my pre-flight to check for an abs code but now I wonder if I should go abs delete. Don't really want that kind of unexpected lockup when I'm really on it.
Last edited by kart14; 10-08-2012 at 06:04 PM.
#107
I think they are two completely separate components, ABS triggering would not have an effect on the differential overheating. I think the topic was simply brought up because that individual had issue with both components on the same day - not because one caused the other.
#108
New Member
iTrader: (17)
Right now, the "common denominator" is the Mid-Ohio race track itself...many turns, lots of heavy braking, and relitively low average speeds...and a lot of driving sideways based on what I saw on the Web of the NASA Championships...
I tried to find the average lap times for the Spec Zs, I recall they are in the 71-73 MPH range...anybody know for sure?
I tried to find the average lap times for the Spec Zs, I recall they are in the 71-73 MPH range...anybody know for sure?
I think they are two completely separate components, ABS triggering would not have an effect on the differential overheating. I think the topic was simply brought up because that individual had issue with both components on the same day - not because one caused the other.
Last edited by laze1; 10-09-2012 at 11:51 AM.
#110
The idea came from some threads over on the thethree70z site. It seems that more vacuum reserve can't hurt..
I know there are different theories within this thread, but still think any/all discussion is helpful for improving the 350Z ABS situation.
Last edited by thekinn; 10-09-2012 at 02:22 PM.
#111
Registered User
iTrader: (1)
In general ABS systems don't care about available vacuum. The booster is only there to assist the driver with applying pedal pressure. I don't know specifically about the 350Z ABS programming but I've replaced boosters on late model BMWs with dual MC brackets and have seen no negative affects on the ABS systems.
And always remember, fan boy sites tend to exaggerate model issues.
And always remember, fan boy sites tend to exaggerate model issues.
#113
Super Moderator
MY350Z.COM
MY350Z.COM
iTrader: (8)
Ice mode feels like that, but the fronts are locked up. Since they are locked, it feels like they are doing nothing so you push harder.
#115
Super Moderator
MY350Z.COM
MY350Z.COM
iTrader: (8)
From what i understand ICE mode disables ABS because it doesnt know when to do when tires are slipping so easily.
#116
Registered User
Apparently there is Electronic Brake Distribution software as well as ABS on all models that will increase brake fluid pressure to the rear wheels to reduce slippage:
EBD Function
Electronic Brake Distributor is a function that detects subtle slippages between the front and rear wheels during braking, and it improves handling stability by electronically controlling the Brake Fluid Pressure which results in reduced rear wheel slippage.
In case of electrical system break down, the Fail-Safe function is activated, the EBD and ABS becomes inoperative, and the ABS warning lamp and brake (EBD) warning lamp are turned on.
Electrical System Diagnosis by CONSULT-II is available.
Fail-Safe Function
ABS, EBD SYSTEM
In case of electrical problems with the ABS, the ABS warning lamp will turn on. In case of electrical problem with the EBD, Brake (EBD) warning lamp, ABS warning lamp will turn on. Simultaneously, the ABS becomes one of the following conditions of the Fail-Safe function.
For ABS trouble, only the EBD is activated and the condition of the vehicle is the same condition of vehicles without ABS equipment.
For EBD trouble, the EBD and ABS become inoperative, and the condition of the vehicle is the same as the condition of vehicles without ABS, EBD equipment. NOTE: In condition 1 described above, an ABS Self Diagnosis sound may be heard. That is a normal condition because a self diagnosis for "Key Switch ON" and "the First Starting" are being performed.
EBD Function
Electronic Brake Distributor is a function that detects subtle slippages between the front and rear wheels during braking, and it improves handling stability by electronically controlling the Brake Fluid Pressure which results in reduced rear wheel slippage.
In case of electrical system break down, the Fail-Safe function is activated, the EBD and ABS becomes inoperative, and the ABS warning lamp and brake (EBD) warning lamp are turned on.
Electrical System Diagnosis by CONSULT-II is available.
Fail-Safe Function
ABS, EBD SYSTEM
In case of electrical problems with the ABS, the ABS warning lamp will turn on. In case of electrical problem with the EBD, Brake (EBD) warning lamp, ABS warning lamp will turn on. Simultaneously, the ABS becomes one of the following conditions of the Fail-Safe function.
For ABS trouble, only the EBD is activated and the condition of the vehicle is the same condition of vehicles without ABS equipment.
For EBD trouble, the EBD and ABS become inoperative, and the condition of the vehicle is the same as the condition of vehicles without ABS, EBD equipment. NOTE: In condition 1 described above, an ABS Self Diagnosis sound may be heard. That is a normal condition because a self diagnosis for "Key Switch ON" and "the First Starting" are being performed.
#117
Registered User
I have two sets of oem wheels I use and do run spacers. We have to use the bolt on style spacer here in NZ and the flush fit nuts supplied with my front spacers are simply inadequate and one side came loose. It nackered the front hub and I was able to hear/feel it quite easily.
I biffed the silly little wheel nuts away and now use long open ended nuts.
I agree with other comments that the hubs should be treated as consumable parts especially when doing track days or more.
#118
Ice mode or not, my brakes didn't work this past weekend and neither did the gravel trap... got a lot of repairing to do. Pedal had pressure, brakes just didn't work. I lifted and re-applied once or twice during my path to berm. Expected the gravel to stop me and didn't have a back-out plan after that.
I won't be tracking it again until the brake system is re-done.. It will be a while before I get to the braking system, but once I do I'll post up the route I take.
I won't be tracking it again until the brake system is re-done.. It will be a while before I get to the braking system, but once I do I'll post up the route I take.
#119
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Join Date: Oct 2002
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Sorry to see that, thekinn, but thanks for posting. It certainly doesn't look like you were overcooking it, and that all of a sudden you just had no brakes at all.
Can you provide some details: tires, pads, how long you had been out in that session, how many sessions you had run earlier, whether there were any warning signals, how the pedal felt, etc.?
Also, what track is that? I don't recognize it.
Can you provide some details: tires, pads, how long you had been out in that session, how many sessions you had run earlier, whether there were any warning signals, how the pedal felt, etc.?
Also, what track is that? I don't recognize it.
#120
Super Moderator
MY350Z.COM
MY350Z.COM
iTrader: (8)
Ice mode or not, my brakes didn't work this past weekend and neither did the gravel trap... got a lot of repairing to do. Pedal had pressure, brakes just didn't work. I lifted and re-applied once or twice during my path to berm. Expected the gravel to stop me and didn't have a back-out plan after that.
http://youtu.be/rl0TIi1inBE
I won't be tracking it again until the brake system is re-done.. It will be a while before I get to the braking system, but once I do I'll post up the route I take.
http://youtu.be/rl0TIi1inBE
I won't be tracking it again until the brake system is re-done.. It will be a while before I get to the braking system, but once I do I'll post up the route I take.
BTW what size tires, front and rear?