maxabo

I'm pretty convinced that the info I want allready has been written about in here somewhere!
But instead of going throw 100 threads to find out the answers to a couple of questions, it seems easier to try it out this way..;

I'm going to the drag strip on may 10th, for the first time!
My car is an SL600 Carlsson CK60 from 2005 with appr. 630HP crank.
I've had it tested with a "Racelogics GPS Drift Box" (with satelite reading) once;
With 20" rims and ASP activated, it ran 12,0 sek @ 120 mph (how reliable that box is, I don't know)...

But this time I'm having 17" MT Street Radials (275/40-17), and hopefully that helps a lot!

Now to my questions;
1. I've read that you guys talk about "resetting" something! What is that?
2. Is it rewardable to take out the passenger seat..? Any other weight saving recommendations perhaps..?
3. I've also heard about people using fire-extinguishers for cooling the IC before take-off..! Is that paying off..?
4. And last, what are your time-estimations..?

Most grateful for your thoughts and ideas...
Thanks!

jmf003

1. Sneaky ECU reset, https://mbworld.org/forums/w211-amg/...set-works.html

2. Removing the passenger seat saves approximately 90 lbs/40 kgs BUT also triggers an SRS fault that doesn't reset when you reinstall the seat. DAS theoretically should be able to remove the fault code but for some reason it failed to do so for Urnext's car. I haven't gotten around to trying DAS and am driving around with the SRS light on.

3. Probably more common to use bags of ice than fire extinguishers. If you use ice, just be sure to catch any water that may leak or condense on the bag as you wouldn't want to drip water down the track. How much does it help with our cars? Probably some on a hot day, less on a cool day.

4. Other R230s making similar power to yours are seeing best ETs in the 11.2 to 11.4 range with best trap speeds of 123 to 126 mph BUT track prep and air density are huge variables. If a hot day and/or weak trap prep then 11.8 @ 120 mph might be a terrific run.

Some other tips and advice here: https://mbworld.org/forums/w211-amg/...acing-how.html

My other advice would be to have fun! It's a blast running full-out plus there are usually other great cars to see and people to meet.

TMC M5

Oh....you want tips for the drag strip...I thought from your thread title that you wanted to know if you should tip strippers...my bad!

There is an inherent difference in how a GPS based data logger and the 1/4 mile track's timing lights measure 1/4 mile performance. The GPS based data logger measures your exact position and speed at 1,320ft from the start. A 1/4 mile track uses timing lights. There is a timing light at the start of 1/4 mile track that let's you known that you are "staged". Depending how "shallow" or "deep" you are staged, you can have up to 18" of tire movement before the front tire will pass through the beam and the timer will start on the run. Most GPS based data loggers also have an ability to measure what they term as a "1 foot roll-out" to simulate a drag strip's delayed timing. I have used my PerformanceBox (a GPS data logger also made by Racelogics) at the drag strip and found that there is a .24-.38 difference in 1/4 mile times based on roll-out.

The other significant difference is trap speed. Because the GPS data logger is measuring the exact speed at 1,320 ft it is an "inflated" figure. The 1/4 mile track is measuring the average speed over the last 66 ft of the run. There are timing lights 66ft from the end of the 1/4 mile timing lights. This is purely a measure of speed based on the time it took to cover that distance. The average will always be lower than the maximum speed at the 1/4 mile mark, provided that the car is still accelerating. I have found the track trap speed to be lower by 1.4-2.1 mph on runs I have also data logged with my PBox.

Are you sure the 17" wheels will clear the rear brake calipers (does the SL600 have dust shields as well?)? The difference in rolling circumference of the 17" drag radial and 20" rims, may also change your effective gear ratio.

Sometimes people disconnect the battery to "reset" the ECU and TCU. The computers has an adaptive memory. So if you have been babying the car, you might want to give the computer a clean slate so it will react to smashing the throttle without some sort of preconceived notion that you want to tour the boulevard.

I have never taken out the passenger seat. To me that is alot of work to save about 75lbs. But I will take the spare tire and tools out of the trunk.

I have never done the fire extinguisher thing. Not sure that would affect anything else under the hood. However, I will throw a bags of ice on top of the intercooler cores to get them nice an cold.

I think you will see an 11.6 @ 119mph with drag radials.

Tom

W211 BEAST

So not what I thought this thread was gonna be about

maxabo

Well, what can I say..?
Other than, if you wanna see some strippers, maybe you're on the wrong home page...
Try youporn.com...

And thanks alot you other guys for all the help!
Very useful tips and info, for my upcoming debut...

No W211 BEAST, not THAT kind of debut.