Baseline drag strip testing - Stock 2013 E63 w/ PP
Senior Member
Joined: Nov 2013
Posts: 344
Likes: 1
'12 E63 Wagon
I need to get better at using race-start -- when I use it and I get the revs up to about 3000 rpm and then let off the brake and slam on the accelerator, the '63 bogs down and jerks forward until it finally starts accelerating aggressively ..
When i tried with the brake torque -- it seemed like a smoother launch. I think the race start just is a matter of getting the technique mastered... not unlike dumping the clutch on a stick shift...
When i tried with the brake torque -- it seemed like a smoother launch. I think the race start just is a matter of getting the technique mastered... not unlike dumping the clutch on a stick shift...
I brake-torqued the car to 2200 RPM and then let the brake go at the last yellow.
I have a 2wd car though, so 2200RPM could probably be significantly raised for the 4matic cars.
Im pleased with a 1.93 60-ft for the 2wd wagon on Contis @ 30psi.
Super Member
Joined: Aug 2009
Posts: 897
Likes: 5
From: Parkland FL
C63 BS, 2011 SLS, 2014 CLS63-S
Not sure why people are having trouble with race start? I always use it at the track and have never had trouble
Also, all of my cars go into S+, not M after RS. Just make sure the wheels are straight, engine temps are good and traction is in Sport.
Lenny from RENNtech told me the best way to run the 4matics is to do it in dyno mode. I have not had a chance to try it but, he said it helps to alleviate the torque limitation. Worth a shot
Also, all of my cars go into S+, not M after RS. Just make sure the wheels are straight, engine temps are good and traction is in Sport.Lenny from RENNtech told me the best way to run the 4matics is to do it in dyno mode. I have not had a chance to try it but, he said it helps to alleviate the torque limitation. Worth a shot
Last edited by ced357; Aug 1, 2014 at 05:40 PM.
Senior Member
Joined: Nov 2013
Posts: 344
Likes: 1
'12 E63 Wagon
Not sure why people are having trouble with race start? I always use it at the track and have never had trouble Also, all of my cars go into S+, not M after RS. Just make sure the wheels are straight, engine temps are good and traction is in Sport.
Lenny from RENNtech told me the best way to run the 4matics is to do it in dyno mode. I have not had a chance to try it but, he said it helps to alleviate the torque limitation. Worth a shot
Also, all of my cars go into S+, not M after RS. Just make sure the wheels are straight, engine temps are good and traction is in Sport.Lenny from RENNtech told me the best way to run the 4matics is to do it in dyno mode. I have not had a chance to try it but, he said it helps to alleviate the torque limitation. Worth a shot
I can try RS again, but it hasnt been very successful in the past. 1.93 or better 60' on Contis show I'm probably doing OK.
I had the original poster by .1 to the 1/8th. He picked up a tenth on the big end, as is evident in his mph. I think that could be the weight of the wagon vs. the sedan working against me.
