madmobman

So i was wondering what the best ways to launch our cars would be. Rolling on to the throttle seems to be oddly effective. Yet so does foot right to the floor, and manual shifting, and building up the revs with the ESP on. i tried to do the last one with the ESP off and i just ended up doing a burn out.

Tanderso

Depends on a number of factors including tires, stock vs modded car, road surface, etc. My 210 with bolt on's usually launches the best in 2nd gear with ESP off.

M3RC3D3SE55AMG

What's your opinion on the TCU and ESP reacting to an upgraded differential in this type of scenario? A Quaife LSD to be precise.

Tanderso

Hey M3RC3D3SE55AMG, that would be a question for someone with an LSD which I have yet to put in my car. Maybe after the supercharger I will need it like you ha ha.

M3RC3D3SE55AMG

Lol I hear that. Well I'll be the Guinea Pig in this case I suppose. I'll run some experimental launches and see how I get on. Forum member Zayed (Cm60k) did inform me that the improvements the Quaife offers traction and power delivery wise could give rise to issues with the TCU, in that the computer will react via the ESP because of its confusion regarding improved traction etc.

_Ryan

Not true. The Quaife is completely transparent to the car's electronics. The traction control will still function the same way, just with less frequent activation due to the increase in traction provided by the Quaife.

M3RC3D3SE55AMG

Hey Ryan, thank you for this information! Are these points known to you from experience? And, from the way you've described the cars response to the new "hardware" - would you say that with the transparency theory it means the ECU/TCU don't "learn" a new way to respond, they simply have less "work" to do?

_Ryan

They don't learn anything. They only respond to wheel spin. If a tire isn't spinning, they don't do anything. An LSD makes it harder for a tire to spin and allows more power to be transferred to the ground. This just means that the electronics don't have a chance to interfere.

M3RC3D3SE55AMG

Got you. That's how I understood it before, I just wanted to clarify.

cm60k

"Quaife" or "Wavetrac" works 100% mechanically, Electronic components will affect the off-spinning Ratio, that depend to the TCU/ESP, and the safety point of traction that saved in the ECU/data,

if nothing to do with Electronics, then why MB change the ECU safety point in the ECU with they put LSD carrier in BS "C63/CLK63/SL63/SL65"(as the PP package),

when i put a factory LSD in W202 C43, the ESP blinks "3" times after WOT spinning, and when i diagnose it, it says; Malfunction point in TCU/CON.speed sensor,

that's clearly means; Electronics wil affect to the safety point in ECU/data, and this of course depend to the TCU version, and ESP S.point..!!

ZAYED,,

M3RC3D3SE55AMG

So the TCU programme tables need to be modified to compensate for the new traction levels!

cm60k

Jim,

Asi remember; your TCU is EGS51..?, if so, it is NOT programmable, nothing to do with TCU on traction, its the safety point in the ECU/ESP,

with your E55, no need to tune anything for traction reason,

i'm talking about the relation between "Traction" vs "Electronics" in general,

for Example; if you have a newer versions, like C63/CLK63, and want to put LSD "Quaife" or "Wavetrac", they will change the safty point in the ECU/data file for better locking results,

which is re-calibrated traction for (ESP) point, specifically engineered for the LSD to allows more power without TC interference. locks about 30% on acceleration and 10% under hard braking,>>a true "diff. locker"..!!

that's why MB put (LSD 2.82:1) in BS versions, instead of non-LSD (2.65:1)..!!

ZAYED,,

M3RC3D3SE55AMG

I see! So because my car runs the old and dusty TCU, this recalibration is not possible?

cm60k

Yeah, EGS51 can't be flushed or programmed..!,

but LSD diff. is another thing, you can go with factory LSD, its great as well..

ZAYED,,

M3RC3D3SE55AMG

The EGS51 can be flushed... Down the toilet! There's always some kind of obstacle in is reaching perfection Lol

cm60k

>>>

_Ryan

Maybe because, as you indicated below, you put in a rear diff with a different ratio than stock? This does require reprogramming, but not because of the LSD. A Quaife will retain factory gear ratios and not throw a code.

The same would happen if you put large drag tires on the rear of the car but not the front...Been there, done that.

cm60k

I didn't change the Ratio, i only put LSD carrier,,

Ratio still as it is (3.07:1)..!!

ZAYED,,