Nitto DR's vs Torque Management
Thread Starter
Heel & Toe
Joined: Apr 2009
Posts: 17
Likes: 0
Nitto DR's vs Torque Management
I have a 2008 C6 A6 ls3 2.73 npp
With factory runflats
I understand that the dreaded TM(Torque management) comes into effect when the rear wheels are turning faster than the front.It detects the slippage and meters back the torque ??
Anyway would a Nitto DR tire that hooked up better and slipped less allow less Tm to be applied ??
Any comments ?
Thanks
Rick
Winnipeg Canada
With factory runflats
I understand that the dreaded TM(Torque management) comes into effect when the rear wheels are turning faster than the front.It detects the slippage and meters back the torque ??
Anyway would a Nitto DR tire that hooked up better and slipped less allow less Tm to be applied ??
Any comments ?
Thanks
Rick
Winnipeg Canada
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,820
From: Charlotte, NC (formerly Endicott, NY)
Not quite how things work.
Traction control will limit the engine's torque and apply the rear brakes if it isn't turned off. This is all controlled by the Electronic Brake Control Module (EBCM). The wheel speed signals go to the EBCM and not to the PCM. If the EBCM sees the rear wheel speeds exceeding the front wheel speeds by a certain amount it will request a torque reduction from the PCM. If that doesn't help reduce the spinning then the EBCM applies one or both rear brakes to control wheel spin. When Traction Control is turned off the EBCM does not send the request to the PCM and does not apply the rear brakes. The PCM which has control of torque management has no idea how fast the rear wheels are going in relationship to the front wheels.
Torque management is used to reduce the shock load on the drive train when shifts are made.
Bill
Traction control will limit the engine's torque and apply the rear brakes if it isn't turned off. This is all controlled by the Electronic Brake Control Module (EBCM). The wheel speed signals go to the EBCM and not to the PCM. If the EBCM sees the rear wheel speeds exceeding the front wheel speeds by a certain amount it will request a torque reduction from the PCM. If that doesn't help reduce the spinning then the EBCM applies one or both rear brakes to control wheel spin. When Traction Control is turned off the EBCM does not send the request to the PCM and does not apply the rear brakes. The PCM which has control of torque management has no idea how fast the rear wheels are going in relationship to the front wheels.
Torque management is used to reduce the shock load on the drive train when shifts are made.
Bill
Team Owner
Joined: Feb 2001
Posts: 27,254
Likes: 136
From: Short Hills, NJ
We knew that real grippy DRs had a tendency to hurt ETs on a stock/mostly stock C6 and that stock tires just might not have been enough especially if track prep was questionable so a more 'middle of the road' drag tire such as the Nitto 555R might just be the answer in that scenario.
Thread Starter
Heel & Toe
Joined: Apr 2009
Posts: 17
Likes: 0
Would a running a set of Nitto's on a stock or slightly warmed over Ls3 A6
Help or hurt 1/4 mile times and street performance ?
I am new at this and realize that newbie's sometimes go in the wrong direction with mod's.
Rick
Help or hurt 1/4 mile times and street performance ?
I am new at this and realize that newbie's sometimes go in the wrong direction with mod's.
Rick
Safety Car
Joined: Nov 2007
Posts: 4,537
Likes: 1,404
From: Bethesda MD
They will help. A stock C6 has more than enough power to benefit from better tires. You may find that you can run the tires at a couple pounds more pressure than some one who is heavily modified.
Team Owner
Joined: Feb 2001
Posts: 27,254
Likes: 136
From: Short Hills, NJ
Thread Starter
Heel & Toe
Joined: Apr 2009
Posts: 17
Likes: 0
I would hate to make the change to Dr's and not gain anything in terms of performance.
Can any forum member who have made the change on a stock Ls3 a6 comment on the gains that they have made in the 1/4 mile or 0 to 60 ?
or what to expect
Thanks
Rick
Can any forum member who have made the change on a stock Ls3 a6 comment on the gains that they have made in the 1/4 mile or 0 to 60 ?
or what to expect
Thanks
Rick
Le Mans Master
Joined: Feb 2006
Posts: 5,762
Likes: 4
From: Chandler Arizona
Now, the kicker: I then returned the borrowed drag radials and bought the exact same setup. So now I have brand new Nitto drag radials that actually hook better than the well used ones I borrowed. Guess what, the car just dead hooks and bogs a little resulting in a best of 1.91 second 60 foot time. With our crappy 1800 rpm stock stall converter you need a little bit of spin to help get the engine up in rpms.
By the way, my 06 has headers so it's probably pretty close to the output of a stock LS3.
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