shimmers

Hi all, just hit 1,500km and completed by break-in period. I just started flooring the beast off the line and already blew away a E46 M3.

Question is that I'm getting a lot of wheel spin and then the RPM lowers a bit at launch. The tranny is set to Sports mode and ESP set to ESP-Sports. I think that with so much wheel spin off the line, the ESP is kicking in which causes the RPM to drop a bit but I'm not sure. I also think that it might be because I don't have the Limited Slip Differencial option.

Can anyone here recommend the best way to launch the car off the line to get the best 0-100km (0-60mph) time? I prefer to keep the Tranny in Sports mode since I believe that the computer will know better to shift at the most optimal time for the quickest acceleration vs me doing it in Manual mode.

Thanks.

tyanger

1- get wider rear tires (265-285)
2- don't stomp throttle like you're killing a roach - use a progressively increasing rate of throttle/foot pressure application so that in the first .5 seconds you are pushing gas at a slow but increasing rate, then keep increasing that rate until you are flooring it at about 1 to 1.5 seconds

mthis

+1. Get some drag radial

jmf003

Shimmers, I think I've seen your C63 around Ann Arbor. Do you sometimes park on Observatory? If it's the car I think I've seen, it's sharp looking.

I concur with your and Tyanger's comments. ESP will apply the brakes and reduce engine power to keep the rear wheels from spinning. As a result any launch that's hard enough to trigger ESP will slow you down. Rolling into the throttle so that you are just a bit short of engaging ESP will give you the fastest launch.

jikjak

try reading through this thread for some pointers.
not everything will apply but there should still be some useful info there.

https://mbworld.org/forums/w211-amg/...acing-how.html

1st amg

limited slip diff will not make a difference on launch, only when you are powering out of a corner.

C63///AMG

first, u need to know exectly what ur timing is. once u hit 3.9 or 4.0sec, then it's the best time although it still spins, it's RWD with high torque u cant do much with it.
although u change to a wider tire, it still gona spins, and btw, if u dont want to change the overall length/perimeter of the tire which will affect the miles per galon. then the tire is gona be 295 rear, 265 front, it's too wide, u gona have to get another rim and also MAY not fit or affect the performance. U gona have to find it out first.

2ndly, best launch for automatic is always hold on brake and then throttle rev to over 3000rpm if the car allows, then release brake fast.

mthis

Do u have a c63?

Jim Brady

Unless you have drag radials and a line lock, 3000 rpm will vaporize stock tires.
Turn off the ESP and try 1300-1500 rpm and roll on the power. At a recent track day we had four BS and C63 at WSIR and we tried all kinds of launch techniques and that seemed to get the best launch. Granted we were using the front straight and didn't have the same prep you would at a drag strip.
Jimmy

yaymitch

Please take some time to type better as most of us will look at this dribble and go to the next post. It also make me think you don't know anything about anything.

maffie

If you are going to use street tires, going wider in size does not necessarily have more grip off the lin. If you understand why... great :thumbsup:

Anyway, try losing a few psi all round. It will help with the traction more than going wider tires.

Alternatively, drag radials as others have stated.

shimmers

So, turn off ESP, hold down the brakes, rev to 1300-1500rpm, release the brakes, and then slowly floor it, right? What I mean by slowly flooring it is that instead of just stomping on the gas all the way, press down to the end moderately...

I tried ESP Sport but it seems turning off ESP is needed so that the engine doesn't brake with ESP kicking in.

tyanger

That's about right, although once you start rolling a little you can start advancing the throttle faster. Don't just use slow steady pressure the whole way through the throttle travel - you should finish at a faster rate than you started.

nychokeyplaya35

I love how he said he blew away an E46 already lol...like thats a fair comparison to a 63....

contigo

good tips

Merc63

ESP is gay turn that crap off.

Press down the gas and dont stomp on it.

Multispeed

Advice is nice but go buy a G-tech and find out for yourself. Go practice launches on a deserted road. You will learn alot about what affects the cars performance.

GHAZAN

Dynolicious is cheaper (12bucks) and performs just as well or even better....one caveat you need an iphone or itouch. Once it's calibrated and set it gives pretty accurate numbers for HP, 0-60, 60ft, 1/8, 1/4.....