SL55/63/65/R230 AMG How much punishment can it hold..?

Oct 10, 2008 | 05:56 AM

maxabo

Thread Starter

Senior Member

Joined: Jan 2007

Posts: 444

Likes: 8

From: Sweden

2008 MB CL600. 2020 MB E300 de. 1987 BMW M535i.

How much punishment can it hold..?

We clocked my car a couple of days ago, with a GPS "Racelogics Drift Box".
With 20" rims, half a tank, and 1 person, the equipment stated the following;

0-62 in 4 sec
1/4 in 12 sec @ 120 m/h

And we weighed it in at 2075 kg, including driver.
So with a bit of math, that makes 3,28125 kg/HP, which gives the car about 665 HP!

The company that does this, is Nordic Uhr in Norrköping (Sweden).
They say that on the estimated HP figure they come up with, it's allways give and take 10 HP.
That means, at least 650 HP!

So my question to you now is, do I dare put on some track tires and test it on the quarter mile, or does my car brake down..?

Nordic Uhr also say that if it doesn't brake, we can hopefully get it down half a second..!
But compared to an SL65, is my drive train weaker in any way..?

No guesses please, because that I can do myself.
And my guess is Yes...

But I'm searching for facts here.
Anyone..?

Last edited by maxabo; Oct 11, 2008 at 04:15 AM.

Oct 11, 2008 | 02:15 PM

IngenereAMG

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Joined: Feb 2004

Posts: 3,703

Likes: 5

From: Arizona

SL55AMG, Ferrari 348, Ferrari Testarossa, Ferrari F40, Ferrari Mondial t, Ducati 916, Indycar

My SL55 has done a bunch of track days since '03, with no failures. I don't do drag racing, so all of my track time has been on road courses. I doubt that drags are more stress full than road courses... so go have fun!

Oct 11, 2008 | 03:34 PM

jmf003

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Joined: Dec 2005

Posts: 1,653

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From: Ann Arbor

'03 SL55

I take my SL55 to the dragstrip several times every year and have never experienced any sort of problem.

Oct 15, 2008 | 02:15 AM

maxabo

Thread Starter

Senior Member

Joined: Jan 2007

Posts: 444

Likes: 8

From: Sweden

2008 MB CL600. 2020 MB E300 de. 1987 BMW M535i.

Quote:

Originally Posted by IngenereAMG

OK, thanks.
But does your 55' develope 150 HP more than stock..?
Because when stock, or with some 30-40 HP+, I think nothing breaks either.
But about 150..?
And I suspect that Carlsson has done nothing with the drivetrain...

Oct 15, 2008 | 02:17 AM

maxabo

Thread Starter

Senior Member

Joined: Jan 2007

Posts: 444

Likes: 8

From: Sweden

2008 MB CL600. 2020 MB E300 de. 1987 BMW M535i.

Quote:

Originally Posted by jmf003

I take my SL55 to the dragstrip several times every year and have never experienced any sort of problem.

Oh boy! 11,9 sec?!?
What have you done to that one..?
Under what circumstances did you get that time..?

Oct 15, 2008 | 07:07 AM

JAYCL600

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Joined: Dec 2001

Posts: 3,704

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From: 20854

new balance

You car will be perfectly fine, put some sticky tires on it and have fun. The drive train is exactly the same as the 65.

Oct 15, 2008 | 09:54 AM

jmf003

MBWorld Fanatic!

Joined: Dec 2005

Posts: 1,653

Likes: 5

From: Ann Arbor

'03 SL55

Quote:

Originally Posted by maxabo

Oh boy! 11,9 sec?!?
What have you done to that one..?
Under what circumstances did you get that time..?

Maxabo, I've run 11.9 seconds at two different tracks, Milan Dragway in Michigan and Alabama International. All the 11.9 runs were on sunny 50 degree days with air density between 0 and 1,000 if I recall correctly.

My list of mods:

VRP 180 mm crankshaft pulley
VRP ecu flash
VRP 80 mm throttle body
VRP air box
VRP extreme belt wrap
Evosport headers
SLR camshafts
Quaife differential

I also do the "Sneaky ECU Reset" before the first run at the track.

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Oct 15, 2008 | 10:17 AM

jmf003

MBWorld Fanatic!

Joined: Dec 2005

Posts: 1,653

Likes: 5

From: Ann Arbor

'03 SL55

Quote:

Originally Posted by maxabo

My car runs the 1/4 mile in 11.9 seconds trapping at 120 mph on street tires. My highest trap speed is 121 mph with a 12.0 elapsed time. That's with a big guy (125 kg) in the driver seat but no passenger. Given the similarity in numbers, my car has to be making similar power to yours.

That said, there are no guarantees. You might be able to make 500 runs with no problem or the very first run could expose some weakness in the drivetrain that shouldn't exist but nonetheless does.

I'm personally comfortable with the risks and thoroughly enjoy the track experience. But if the risk of possibly breaking your car puts a knot in your stomach, then it's probably not worth doing.

Either way, enjoy your car! You definitely have a hot setup.