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Old 09-28-2009, 08:42 PM   #1121
M3_GTR
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While on the topic of automatics, say someone does a donut in a manual, the car spins around and they roll back abit obviously once the car is thrown around, but in an auto it stops there and then (im guessing the tranny wont let it roll back?) is that bad for it in any way??

And also, say i take off in manual mode and floor it out of a corner and my wheels spin and the car automatically shifts into 2nd, is that bad in any way while the wheels are still spinning?

BTW i dont do donuts in my car, but the car does shift into second when i take off hard cos of wheelspin.
Id also prefer answers and not someone saying you shouldn't do it, because you all do it too
thanks xD
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Old 09-28-2009, 08:51 PM   #1122
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thats really weird. because everytime ive done donuts, its never shifted up... so i cant really give advice here.
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Old 09-28-2009, 08:53 PM   #1123
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In a manual you roll back because you have disengaged the drive from the engine to the diff, you can do the same in an auto just move the car from drive to neutral and the car should roll back as there is no drive.

The reson that happends is because in the BMW auto the gearbox will not let the car bounce off the rev limiter it will change up at the redline, modulate the pedal so that your max revs are 500 below the red line until most of the wheelspin is over then floor it to change up to second.

BobZ

PS. I do not condone unsafe or illegal driving on the roads.
PPS. No not every one does it I have much better ways to waste my tyres then by doing donuts.
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Old 09-28-2009, 08:57 PM   #1124
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In a manual you roll back because you have disengaged the drive from the engine to the diff, you can do the same in an auto just move the car from drive to neutral and the car should roll back as there is no drive.

The reson that happends is because in the BMW auto the gearbox will not let the car bounce off the rev limiter it will change up at the redline, modulate the pedal so that your max revs are 500 below the red line until most of the wheelspin is over then floor it to change up to second.

BobZ

PS. I do not condone unsafe or illegal driving on the roads.
PPS. No not every one does it I have much better ways to waste my tyres then by doing donuts.

Understood.
So its doesnt really do damage to the car, in either situation?
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Old 09-28-2009, 09:01 PM   #1125
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It does not have a double clutch like the M3 or the Porker or the VW/Audi, it has a 7 speed automatic transmission with a torque converter and planetary gear set.

The new SL65 has an automatic gearbox but the torque converter has been replaced with a multi plate wet clutch, (see any bike except Ducati sport bikes)

The new SLS300 (the gull wing one) does have the dual clutch transmission but its part of the transaxle so i dont know how quicly it will be available in the normal line up, the next car to get this architecture might be the next generation SLK.

BobZ

PS. Still a great car but I do hate automatics....
Edit ... I was also told it was the same as the gulwing sls ..

I'm talking about the brand spanker E63 ...2010 model.. Not even released yet , it's actually dye for reaslese early dec late nov .. I was told by the driver that it had double clutch.. So I'm just going by what I was told...
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who da F done that?
prestige warehouse or who?

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Old 09-28-2009, 09:02 PM   #1126
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Originally Posted by bobz View Post
The reson that happends is because in the BMW auto the gearbox will not let the car bounce off the rev limiter it will change up at the redline, modulate the pedal so that your max revs are 500 below the red line until most of the wheelspin is over then floor it to change up to second.

BobZ

PS. I do not condone unsafe or illegal driving on the roads.
PPS. No not every one does it I have much better ways to waste my tyres then by doing donuts.
wow bob, that was actually quite insightful. ive always wondered why i cant keep the bloody thing sideways for a prolonged period of time, and i now understand why midway through corner the engine usually dies a bit, the wheels grip, and it sends me straight towards the gutter.
ps, i too do not condone unsafe or illegal driving, however abandoned industrial areas at 3am arent exactly putting any one elses lives in danger despite popular nanny beliefs.
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Old 09-28-2009, 09:02 PM   #1127
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Doing donuts places the gearbox and the engine under thermal stress your not going quickly enough to cool them so if your going to do donuts for long enough you will overheat the engine and/or the gearbox, also be mindful of axle tramp as this can cause considerable damage to the driveline.

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Old 09-28-2009, 09:07 PM   #1128
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I'm talking about the brand spanker E63 ...2010 model.. Not even released yet , it's actually dye for reaslese early dec late nov .. I was told by the driver that it had double clutch.. So I'm just going by what I was told...
The E63 will have the same 7 speed automatic gearbox as the current C63 but it will get a SINGLE multi plate wet clutch, (see motorbikes again) to replace the torque converter the aim of this change is to improve fuel consumption as there is less slip losses with a wet clutch vs a torque converter.

This gearbox is in the New AMG SL.

BobZ

PS. Believe only half of what you see and only a quarter of what you hear.
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Old 09-28-2009, 09:07 PM   #1129
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Not really into the donut thing, just tried it a few times, my biggest worry was if i was damaging anything when it shifted into 2nd wheelspinning. Thanks for the input bobZ
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Old 09-28-2009, 09:08 PM   #1130
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If your auto is spinning the wheels on take off, I would sugest a new set of tyres.
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Old 09-28-2009, 09:09 PM   #1131
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ps, i too do not condone unsafe or illegal driving, however abandoned industrial areas at 3am arent exactly putting any one elses lives in danger despite popular nanny beliefs.
Illegal is illegal and you are putting your life in danger if something were to go wrong and no one else knew you were there, but to each their own.

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Old 09-28-2009, 09:10 PM   #1132
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If your auto is spinning the wheels on take off, I would sugest a new set of tyres.
Not in a straight line, while taking a corner.
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Old 09-28-2009, 09:11 PM   #1133
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If your auto is spinning the wheels on take off, I would sugest a new set of tyres.
I dont think there are tyres made that will allow 350HP+ to be transmitted through them if you are hamfisted with the throttle or the clutch pedal.

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Old 09-28-2009, 09:44 PM   #1134
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Who said anything about 350hp?
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Old 09-28-2009, 09:47 PM   #1135
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Who said anything about 350hp?
318i auto = hectic 2nd gear wheelspin = 350hp = match for no tyre.
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Old 09-28-2009, 09:49 PM   #1136
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Bobz the 2010 E63 will be the second AMG to get the transaxle wet multi-clutch auto - it's already launched in europe with it, or so ive read - which would mean the new E63 coupe will be released with it too, that's going to be a hot car

the first AMG to launch with it was the SLS

it will soon filter down to all new AMG models

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Old 09-28-2009, 09:57 PM   #1137
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Bobz the 2010 E63 will be the second AMG to get the transaxle wet multi-clutch auto - it's already launched in europe with it

the first AMG to launch with it was the SLS

it will soon filter down to all new AMG models
my understanding, and I could be very wrong is that the 2 are completely different things,

dual multy plate wet clutch manual transmission is different then a multy plate wet clutch automatic transmission which is what the new AMG models will come out with.

Some UK and US jurnalists are having a go at MB AG for being very liberal with the translation from german to english to make it sound as though the new E63 has the same gearbox like the Porker or VAG.

Sam, I can gurantee you the 2010 E63 will not get a transaxle gearbox as there is no room to fit 1 in the car as it would take up a lot of rear leg room not exacly something you would want to loose in a luxury car.

Will wait for the official release documentation?

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Old 09-28-2009, 10:00 PM   #1138
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318i auto = hectic 2nd gear wheelspin = 350hp = match for no tyre.
Cool got it
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Old 09-28-2009, 10:17 PM   #1139
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Who said anything about 350hp?
just to put in perspective, I had no problems getting wheelspin in my E36 318i (no s) with Michelin Pilot Sports on the BMW alloy wheels.

BobZ

PS. Offcourse in a controlled enviroment....
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Old 09-28-2009, 10:30 PM   #1140
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back to the transmission issues with MB.

SLS as well as Porka VAG and now M3 have a DCT (Dual clutch transmission)

AMG 2010 models have a MTC (manual clutch transmission)

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