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So what is the final word on limited slip differential?

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Old Sep 6, 2008 | 12:33 AM
  #1  
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So what is the final word on limited slip differential?

When I first learned of the car, the idea of driving so much hp/torque, rear wheels only, and no LSD sounded odd to me. Initial thought was that I would never buy the car without it. Now that there is starting to be some inventory build up, in colors I like, at better prices, etc. I am getting tempted to just pick up one without the PP and forget the LSD.

Can some owners chime in that do NOT have the PP/LSD... in bumpy or wet condititions, have you found yourself white knuckled because of handling/grip problems, etc.?

Normally I wouldnt worry about LSD except for the track, but with SO much power to those back wheels....
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Old Sep 6, 2008 | 01:48 AM
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Originally Posted by jtrichel
When I first learned of the car, the idea of driving so much hp/torque, rear wheels only, and no LSD sounded odd to me. Initial thought was that I would never buy the car without it. Now that there is starting to be some inventory build up, in colors I like, at better prices, etc. I am getting tempted to just pick up one without the PP and forget the LSD.

Can some owners chime in that do NOT have the PP/LSD... in bumpy or wet condititions, have you found yourself white knuckled because of handling/grip problems, etc.?

Normally I wouldnt worry about LSD except for the track, but with SO much power to those back wheels....
i dont have pp on my car and i have a 08 so i dont have lsd. but when straight take off if i floor it my car will spin 1st 2nd and 3rd thats with 255 in the rear and both tires spining. now i put 275 in the rear that car is a beast of line. with 255 in the rear i would run 0-60 in 4.05 to 4.20 on my g-times with 275 in the rear i run 0-60 3.82 to 3.99 with good take off.


yea i no that the gtimes is not accurate by 1 tenth sec for does ppl who ganna question it

Last edited by mthis; Sep 6, 2008 at 02:08 AM.
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Old Sep 7, 2008 | 11:18 AM
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anyone else?

Pretty much all I care about from the PP is the LSD, and curious to hear from those that have lived without it for a few months now
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Old Sep 7, 2008 | 01:19 PM
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Originally Posted by mthis
i dont have pp on my car and i have a 08 so i dont have lsd. but when straight take off if i floor it my car will spin 1st 2nd and 3rd thats with 255 in the rear and both tires spining. now i put 275 in the rear that car is a beast of line. with 255 in the rear i would run 0-60 in 4.05 to 4.20 on my g-times with 275 in the rear i run 0-60 3.82 to 3.99 with good take off.
How about in corners? How does the car handle w/o LSD? I'm concern about the LSD too since here in my country the pp option will cost an extra US$12K(tax included) and you cannot just order the LSD option.

Thanks in advance for any information.
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Old Sep 7, 2008 | 02:56 PM
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For street racers or posers it really is semantics.

How many people time posers?

Put it on a track and then timing becomes interesting.

How many people track a C63...tell me ..I have not seen any?

You get more performance out of a 3 day Skip Barber course than you ever will with ecu, lsd and all the other MOD's total BS driven by the tuners!
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Old Sep 7, 2008 | 03:31 PM
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If you race the car, regardless of the kind of racing, you need a LSD.
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Old Sep 7, 2008 | 03:42 PM
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Originally Posted by MHP
If you race the car, regardless of the kind of racing, you need a LSD.
Absolutely!

But for the street forget it!
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Old Sep 7, 2008 | 03:44 PM
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Originally Posted by MHP
If you race the car, regardless of the kind of racing, you need a LSD.
Absolutely, but I have not seen any C63 racing lately!

Its a modification thing otherwise!
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Old Sep 7, 2008 | 03:45 PM
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Originally Posted by bizguy4u
Absolutely!

But for the street forget it!
Just so you know I wasn't directing my last post at yours, just making a general statement.

I haven't driven non LSD equipped C63 so I can't really comment on how they launch on the street. I do know that even with the LSD I got signficant wheelspin at WOT from a dig unless I rolled into the throttle. Now with the Nittos (285/35 DRs) outback I can brake stall to 1800rpm without spinning; this is without dropping the pressure and heating the DRs either.
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Old Sep 7, 2008 | 03:46 PM
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Originally Posted by bizguy4u
Absolutely, but I have not seen any C63 racing lately!

Its a modification thing otherwise!
I've only hit the drag strip so far (for pretune baselines) but am trying to get to at least one or two OT events before the season ends. Hopefully I'll have the P30 suspension and brakes on by then...
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Old Sep 7, 2008 | 03:53 PM
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I think we should clarify between racing on a "track" and a "drag" strip in posts.

Two completely different worlds!

10 or 12 seconds on a straight "***** to the wall" drag strip versus 30 minutes, 60 minutes on a road course. Not really comparable!
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Old Sep 7, 2008 | 04:29 PM
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Originally Posted by bizguy4u
I think we should clarify between racing on a "track" and a "drag" strip in posts.

Two completely different worlds!

10 or 12 seconds on a straight "***** to the wall" drag strip versus 30 minutes, 60 minutes on a road course. Not really comparable!
Not really comparable, but the LSD is necessary at both venues so it doesn't really matter.
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Old Sep 7, 2008 | 05:35 PM
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Originally Posted by MHP
Not really comparable, but the LSD is necessary at both venues so it doesn't really matter.
MHP is absolutely correct and why MB decided not to equip an AMG car without LSD...I can only guess profit margin
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Old Sep 7, 2008 | 05:36 PM
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and supposedly the "electronic" limited slip on all non-mechanical LSD cars works pretty good anyway right?
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Old Sep 7, 2008 | 08:35 PM
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Originally Posted by scarbrtj
and supposedly the "electronic" limited slip on all non-mechanical LSD cars works pretty good anyway right?
We have ediffs in the Jeep SRT8 front and rear. They are in no way as good as a true mechanical LSD. In stock or near stock form Jeeps hook HARD off the line, but add a decent amount of power (nitrous, blower, turbo, H/C) and you're going to spin the front left and rear right wheels only.

ediffs are better than nothing but still not as good as a traditional mech. LSD.
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Old Sep 8, 2008 | 07:28 AM
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Originally Posted by scarbrtj
and supposedly the "electronic" limited slip on all non-mechanical LSD cars works pretty good anyway right?
Not even close my friend.

Even with the ESP off, that little blinking light will come on, because the e-diff CAN NOT keep up. If you do ANY tracking, or even just drive spiritly on the street, you TRUELY WANT/NEED a REAL LSD.

See yeah
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Old Sep 8, 2008 | 12:35 PM
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Originally Posted by MHP
Just so you know I wasn't directing my last post at yours, just making a general statement.

I haven't driven non LSD equipped C63 so I can't really comment on how they launch on the street. I do know that even with the LSD I got signficant wheelspin at WOT from a dig unless I rolled into the throttle. Now with the Nittos (285/35 DRs) outback I can brake stall to 1800rpm without spinning; this is without dropping the pressure and heating the DRs either.
Andy: I cancelled my C63 order that I had placed. I did not have the PP P30 package on it. I will definitely order the P30 when I order the C63 next year.
Have you heard anything about a DCT transmission in the future for the C63?
That would definitely be on my list of options!!

I ordered White before but I will order Black next time (Black really looks great in person)

Regards
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Old Sep 8, 2008 | 12:50 PM
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Originally Posted by deaguero
Andy: I cancelled my C63 order that I had placed. I did not have the PP P30 package on it. I will definitely order the P30 when I order the C63 next year.
Have you heard anything about a DCT transmission in the future for the C63?
That would definitely be on my list of options!!

I ordered White before but I will order Black next time (Black really looks great in person)

Regards
+1 You see now...Some people are starting to get smart on this tread even with colors.
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