The myth of the DSC OFF switch
07-13-2006, 05:35 PM
#101
Registered
Thread Starter
Join Date: May 2006
Location: Milan, Michigan
Posts: 575
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Moostafa29
If you give me your email addy or aim sn, I'll send you a vid from best motoring that shows you how each of them function, and how they effect the handling. I haven't read any of this, so if this has been posted, please disregard.
07-13-2006, 05:40 PM
#103
Registered User
Just one more little input,when you have finished field testing you can try to get hold of Mazda publication 9999-95-102F-04 which gives you Mazda's version of the vatious parts of the system discussed here and how they function.Then you can sort the manure from real information.(of course this assumes that Mazda know what in fact they designed and built)
07-13-2006, 09:17 PM
#107
Storm Trooper
Join Date: May 2004
Location: Freakmont, CA
Posts: 3,908
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by puch96
you can send it at puch96@hotmail.com
07-14-2006, 07:02 AM
#108
Registered
iTrader: (1)
Join Date: May 2003
Location: PA
Posts: 3,754
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by two rotors
This is for those who think rear brake action is not invoved in Mazda's RX-8 TCS
Applying the brakes to one rear wheel only with an LSD creates horrible noises - as experienced when the DSC system does in to get you out of a slide.
Last edited by r0tor; 07-14-2006 at 07:05 AM.
07-14-2006, 09:46 AM
#109
Registered
Thread Starter
Join Date: May 2006
Location: Milan, Michigan
Posts: 575
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Moostafa29
Email sent.
Although I don't think this video demonstrates the difference between pushing the button and push and hold the button...
1st run: DSC/TCS on @ 100kph
2nd run: DSC/TCS on @ 110kph
3rd run: DSC/TCS hold for 7 seconds.......
so what about pushing DSC/TCS???? without the hold....maybe I missed it...
07-14-2006, 02:09 PM
#110
Registered User
Originally Posted by r0tor
now find the part of the manual that explains what the Limited Slip Differential does and find out there will not be any wheel speed difference under acceleration...
Applying the brakes to one rear wheel only with an LSD creates horrible noises - as experienced when the DSC system does in to get you out of a slide.
Applying the brakes to one rear wheel only with an LSD creates horrible noises - as experienced when the DSC system does in to get you out of a slide.
Or not as you wish.
07-14-2006, 02:16 PM
#111
In the above excercise, the LSD will work perfectly. You still won't go anywhere, but both wheels will spin equally.
With the TCS on, the PCM will snuff the throttle everytime you stomp on it and will "assist" the LSD by clamping whichever wheel looses traction first.
It is a great system for adding insult to injury - instead of just being stuck, your car is now taunting you.
My experience with this nary two weeks after purchase is documented elsewhere.
With the TCS on, the PCM will snuff the throttle everytime you stomp on it and will "assist" the LSD by clamping whichever wheel looses traction first.
It is a great system for adding insult to injury - instead of just being stuck, your car is now taunting you.
My experience with this nary two weeks after purchase is documented elsewhere.
07-14-2006, 02:24 PM
#112
Registered
iTrader: (1)
Join Date: May 2003
Location: PA
Posts: 3,754
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by two rotors
So take your car out in the snow or other low,low friction surface,turn off the DSC/TCS and try accelerating in a straight line at a decent rate.Tell me how good your LSD is.Then try the same excercise with the DSC off but the TCS still active.
Or not as you wish.
Or not as you wish.
With DSC on in the snow, I floor it and the computer takes all control of the gas pedal away. After you get going, it starts to modulate the throttle and you get repeated periods of wheel spin and harsh throttle reductions... if the car kicks sideways the DSC modulates individual brakes to straighten you. I'd say it has a 15-30 degree allowance of yaw rate before it intervenes.
One touch DCS off, you can do a 1/4 mile long burnout with the 2 plumes of snow flying out behind you (thanks to the LSD!!!) with the car fish tailing all over the place ... i have definately done this on several occasions since its fun as hell. There is no intervention ever that i've found even with the tires spinning 40 mph faster then your actually going.
The 7 sec mode does the same thing...
07-14-2006, 04:53 PM
#114
RX8 and a Truk....
Originally Posted by MazdaManiac
In the above excercise, the LSD will work perfectly. You still won't go anywhere, but both wheels will spin equally.
With the TCS on, the PCM will snuff the throttle everytime you stomp on it and will "assist" the LSD by clamping whichever wheel looses traction first.
It is a great system for adding insult to injury - instead of just being stuck, your car is now taunting you.
My experience with this nary two weeks after purchase is documented elsewhere.
With the TCS on, the PCM will snuff the throttle everytime you stomp on it and will "assist" the LSD by clamping whichever wheel looses traction first.
It is a great system for adding insult to injury - instead of just being stuck, your car is now taunting you.
My experience with this nary two weeks after purchase is documented elsewhere.
To further this - with all the nanny modes working, my car has DIED while trying to start on a slippery surface. The brakes would clamp enough to stop all motion and kill the engine.
07-14-2006, 05:15 PM
#116
Registered
iTrader: (1)
Join Date: May 2003
Location: PA
Posts: 3,754
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by zoom44
yeah DSC on sucks in the snow
the downside is if your on the verge of getting stuck say going up a hill, the traction control has the habit of slowing you down and making you lose momentum... or if you are stuck you need some wheel spin to help get you going
07-14-2006, 08:58 PM
#117
Rotary Public
Join Date: Dec 2004
Location: Northern Virginia near DC
Posts: 1,512
Likes: 0
Received 2 Likes
on
2 Posts
Originally Posted by r0tor
after driving this thing through 2 winters..
With DSC on in the snow, I floor it and the computer takes all control of the gas pedal away. After you get going, it starts to modulate the throttle and you get repeated periods of wheel spin and harsh throttle reductions... if the car kicks sideways the DSC modulates individual brakes to straighten you. I'd say it has a 15-30 degree allowance of yaw rate before it intervenes.
One touch DCS off, you can do a 1/4 mile long burnout with the 2 plumes of snow flying out behind you (thanks to the LSD!!!) with the car fish tailing all over the place ... i have definately done this on several occasions since its fun as hell. There is no intervention ever that i've found even with the tires spinning 40 mph faster then your actually going.
The 7 sec mode does the same thing...
With DSC on in the snow, I floor it and the computer takes all control of the gas pedal away. After you get going, it starts to modulate the throttle and you get repeated periods of wheel spin and harsh throttle reductions... if the car kicks sideways the DSC modulates individual brakes to straighten you. I'd say it has a 15-30 degree allowance of yaw rate before it intervenes.
One touch DCS off, you can do a 1/4 mile long burnout with the 2 plumes of snow flying out behind you (thanks to the LSD!!!) with the car fish tailing all over the place ... i have definately done this on several occasions since its fun as hell. There is no intervention ever that i've found even with the tires spinning 40 mph faster then your actually going.
The 7 sec mode does the same thing...
07-14-2006, 09:19 PM
#118
He's as bad as Can
Originally Posted by Paul_in_DC
Once on the track at Summit Point / Shenandoah Circuit I forgot to turn off the DSC, and it did something really strange, but under unusual circumstances... I was in the banked turn (or "Karussel") going a moderate speed, and the DSC kicked in. While I was nowhere's near sliding out, I suspect it got confused by the weird angle and activated itself.
07-14-2006, 09:41 PM
#119
Rotary Public
Join Date: Dec 2004
Location: Northern Virginia near DC
Posts: 1,512
Likes: 0
Received 2 Likes
on
2 Posts
Originally Posted by expo1
I did the same thing there but was going fast. It kicked in and also cut the throttle in an attempt to figure out what the hell I was doing. Here is a pic of another car on the loop.
It's funny, but in the pic it doesn't look like a very steep bank, but when I'm on it, it feels like it's about 45 degrees. Are you heading back there any time soon? I plan to go there with Mazdadrivers in September.
Edit: Add pic
Last edited by Paul_in_DC; 07-14-2006 at 09:47 PM.
07-14-2006, 09:54 PM
#120
He's as bad as Can
I am already booked for Sept 9th & 10th with Mazda Drivers I liked that track, very fair to cars like the RX-8 & higher HP cars. I also liked the blind left turn known as the 'HOOK' Here is a small vid taken on my last trip LINK
PM me if you wish to share some expenses.
I liked that track, very fair to cars like the RX-8 & higher HP cars. I also liked the blind left turn known as the 'HOOK' Here is a small vid taken on my last trip LINK PM me if you wish to share some expenses.
Last edited by expo1; 09-06-2008 at 04:59 PM.
07-15-2006, 07:44 AM
#122
He's as bad as Can
Originally Posted by MazdaManiac
Have you driven the new course, yet?
07-15-2006, 11:34 AM
#123
Rotary Public
Join Date: Dec 2004
Location: Northern Virginia near DC
Posts: 1,512
Likes: 0
Received 2 Likes
on
2 Posts
Yes, the Shenandoah Circuit is the new course. I was there last September with Mazdadrivers too, and I'm signed up for this September 9-10 too. 
One thing they did last year and may do again this year... You see Turn 18 on the map, where it connects Training Loop to the Cave Esses? They used that shortcut last year to bypass the Pit Straight. The concern is that coming out of the Downhill S onto the Pit Straight, there's a concrete pit wall on the outside of the turn. So they bypassed it for safety reasons.
One thing they did last year and may do again this year... You see Turn 18 on the map, where it connects Training Loop to the Cave Esses? They used that shortcut last year to bypass the Pit Straight. The concern is that coming out of the Downhill S onto the Pit Straight, there's a concrete pit wall on the outside of the turn. So they bypassed it for safety reasons.
05-30-2012, 01:56 PM
#124
did any body change the rear tires into the front tires put them in the rear tires? the car with the curve lines light is always on at the dashboard ? is changing the tires is the reason ??
05-30-2012, 02:05 PM
#125
Registered
iTrader: (2)
Join Date: Oct 2007
Location: Pacific Northwest
Posts: 16,684
Likes: 0
Received 240 Likes
on
110 Posts
6 year thread resurrection
This likely means that your tires are not the same circumference. This could be based on tire pressure changing or actually differently sized tires. The traction control system is seeing a problem in the different rotation rate of the front and rear and can't figure out what is going on, so disabled the system.
This likely means that your tires are not the same circumference. This could be based on tire pressure changing or actually differently sized tires. The traction control system is seeing a problem in the different rotation rate of the front and rear and can't figure out what is going on, so disabled the system.