DSC, On or Off?

Rotary Potato
Former Member
Former Member
Posts: 2181
Joined: Sun Jun 12, 2016 9:22 am
RX-8: PZ
Colour: Brilliant Black
Location: Leamington Spa, Warwickshire
Has thanked: 52 times
Been thanked: 247 times

Re: DSC, On or Off?

Post by Rotary Potato » Thu Jul 06, 2017 1:33 pm

My car had (about to be changed after wearing right down after my first trackday) some nice mis-matched ditchfinders on ... which cause the car to throw all manner of ABS, DSC and TC warning lights after a few minutes of enthusiastic driving. This appears to disable ALL the electronic driving aids until the car is switched off and switched on again.

I've found that when driving fast and smooth, the difference is imperceptable ... when driving like a hooligan there is more of a difference! :lol:
Huw

2004 Velocity Red 231 - SatNav, parking sensors, sunroof, red/black interior, K&N Typhoon, Toyo backbox, f- :censored: -ked engine - bought Jun 2016 sold Oct 2016
2006 Black PZ - Rotary Revs full Bridgeport Gold rebuild - Toyosport decat - SAI delete - 585R coils - K&N air filter - purchased Oct 2016 - Engine rebuild Dec 2017

User avatar
Stribo
Former Member
Former Member
Posts: 363
Joined: Sun Oct 03, 2010 8:20 am
RX-8: Import
Colour: Velocity Red
Location: Mortimer
Has thanked: 22 times
Been thanked: 43 times

Re: DSC, On or Off?

Post by Stribo » Thu Jul 06, 2017 5:30 pm

Off. :D

User avatar
PeteH
Committee Member
Committee Member
Posts: 5844
Joined: Mon Apr 11, 2016 1:26 pm
RX-8: 231
Colour: Custom
Location: West Sussex
Has thanked: 178 times
Been thanked: 814 times

Re: DSC, On or Off?

Post by PeteH » Thu Jul 06, 2017 7:07 pm

Stribo wrote:Off. :D
Yes, but you repair body panels so your vote is void! ;)
RX-8 in Time Attack 2016 (2nd in class) & 2017 (Championship Winner)
http://www.rx8ownersclub.co.uk/forum/vi ... 04&t=69554

User avatar
zippyonline
Club Member
Club Member
Posts: 1300
Joined: Mon May 05, 2014 11:16 am
RX-8: Evolve
Colour: Copper Red
Location: Essex/Suffolk
Has thanked: 49 times
Been thanked: 86 times

Re: DSC, On or Off?

Post by zippyonline » Fri Jul 07, 2017 9:41 am

PeteH wrote:
Stribo wrote:Off. :D
Yes, but you repair body panels so your vote is void! ;)
Are you confusing Stribo with Shambo? ;)
These users thanked the author zippyonline for the post (total 2):
SeriousSam (Fri Jul 07, 2017 9:52 am) • Stribo (Fri Jul 07, 2017 10:02 am)
Copper Red Evolve - viewtopic.php?f=104&t=71400

User avatar
Stribo
Former Member
Former Member
Posts: 363
Joined: Sun Oct 03, 2010 8:20 am
RX-8: Import
Colour: Velocity Red
Location: Mortimer
Has thanked: 22 times
Been thanked: 43 times

Re: DSC, On or Off?

Post by Stribo » Fri Jul 07, 2017 10:02 am

PeteH wrote:
Stribo wrote:Off. :D
Yes, but you repair body panels so your vote is void! ;)
I wouldn't know how to repair a body panel. :) I've found I can get a nice 4 wheel drift with it off, whereas, with it on I can't, that having been said, if it's wet, I leave it on.

User avatar
PeteH
Committee Member
Committee Member
Posts: 5844
Joined: Mon Apr 11, 2016 1:26 pm
RX-8: 231
Colour: Custom
Location: West Sussex
Has thanked: 178 times
Been thanked: 814 times

Re: DSC, On or Off?

Post by PeteH » Fri Jul 07, 2017 10:40 am

zippyonline wrote:
PeteH wrote:
Stribo wrote:Off. :D
Yes, but you repair body panels so your vote is void! ;)
Are you confusing Stribo with Shambo? ;)
Ooops! :oops:
RX-8 in Time Attack 2016 (2nd in class) & 2017 (Championship Winner)
http://www.rx8ownersclub.co.uk/forum/vi ... 04&t=69554

User avatar
warpc0il
Spin Doctor
Spin Doctor
Posts: 22466
Joined: Sat Sep 06, 2008 10:56 pm
RX-8: 231
Colour: Lightning Yellow
Location: Groomsport, Co Down, NI
Has thanked: 310 times
Been thanked: 1181 times
Contact:

Re: DSC, On or Off?

Post by warpc0il » Sat Jul 08, 2017 11:07 am

The RX8 benefits from a stiff chassis, with compliant suspension (for a sports car), near perfect 50/50 weight distribution, masses of grip and a sophisticated limited-slip diff, all of which means that you can push it really hard before it gets close to losing control.

The DSC is also quite sophisticated in that it doesn't just monitor the wheel sensors, there's also a steering angle sensor and a yaw sensor to monitor lateral acceleration.

This means that the DSC can operator multiple strategies, depending on the situation and the last thing it will do is reduce engine power.

It's primary control is tiny braking actions on individual wheels, to get the car back on "the intended line" - or the direction that it assumes you want to go based on the steering angle.

When new, this system works really well but, in addition to the tyre size and others mods described above, there are a couple of other ways it can been prevented from working properly.

Cheap tyres - these are referred to a "ditch finders" for a reason and no amount of sophisticated DSC is going to beat the laws of physics if there just isn't any grip.

Sticking brakes - this is becoming a more common problem. Sometimes it's the pistons that are sticking but more often it's the caliper slide pins. This means that tiny applications of the brakes either don't happen or when they happen they don't immediately release, the caliper sticking off or on.

It's wasn't uncommon for the rear calipers to stick solid, so the discs aren't being clamped by the pads, just rubbed on one side, as the rear brakes don't see as much action as the front in normal driving. This is now becoming more common for the fronts as well, as cars are becoming older and many are being left standing for longer periods.

All this means that the primary strategy of the DSC either can't work at all or actually makes things worst, and all it's got left is to reduce engine power.

If your DSC seems a little too eager to kill power and you know that your tyres are okay, then the next place to look is the brakes.
These users thanked the author warpc0il for the post (total 3):
ChrisHolmes (Sat Jul 08, 2017 12:31 pm) • TerryH (Sat Jul 08, 2017 1:45 pm) • Dr. FrankenRex (Mon Jul 17, 2017 8:57 am)
Dave
The Spin Doctor ™
uǝǝɹɔs ɹnoʎ ʇɹǝʌuı ǝsɐǝld :ɹoɹɹǝ

Post Reply

Return to “Trackday Information & FAQ's”