Max Torque rating of C220 W203 Autobox

[merc07]

This was apparantly listed on the other forum but I can't find and info.

Interested to see what the figures are with all the talk of ECU mapping and the Brabus chip being pulled a while ago.

The 5 speed on mine comes up as 722.699

Cheers
Adam

 

[miro]

Let's look at two things. The rated output value and the expected increase.

The two things which destroy gearboxes are not the top value of output but the standing start and ramp (pulse force) values.

I can quite happily attach a V8 to my current C180 gearbox (well not exactly but if it could attach) and differential (dont forget the back end) and if I were to race the car it would shred itself instantly. The gearbox and differential would implode.

Even the SL65 in stock trim is capable of shredding its drive shafts. Yet those are factory issue.

The factors in asking this question are intended function. If you want high-G line starts then you will need the gearbox stripped down and re-rated to the friction plates for a CDI-320 or 270. Plus also a change of torque converter. So as to match the values expected from the increase.

Just look at the factory values for the larger engines and those drivetrains and then look at the chipped values of the smaller motor and see where the changes put you.

 

[merc07]

Thanks Miro, as you say, looking at the factory values, the 270 engine (370Nm) uses a differnet box to the 220 engine (340Nm) so probably not much room for extra power on this one.

I don't want to race the thing, far from it, just a reliable economy tune giving a little mere torque.

Cheers
Adam

 

[1998K]

Thanks Miro, as you say, looking at the factory values, the 270 engine (370Nm) uses a differnet box to the 220 engine (340Nm) so probably not much room for extra power on this one.

I don't want to race the thing, far from it, just a reliable economy tune giving a little mere torque.

Cheers
Adam

pay attention because on W203 270cdi engine were rated with 370Nm with manual gearbox, and 400Nm with auto...at least here in my Country.

...yes mine is an auto:bannana:

 

[Dieselman]

722.699 is 330Nm max.

http://www.mbclub.co.uk/forums/showpost.php?p=558414&postcount=15

 

[miro]

722.699 is 330Nm max.

http://www.mbclub.co.uk/forums/showpost.php?p=558414&postcount=15

So you strip down the old gearbox and uprate the friction plates and then put it all back together.

For 150 GBP you can have the torque converted done too.

 

[Dieselman]

So you strip down the old gearbox and uprate the friction plates and then put it all back together.

Assuming the bearing carriers and clutch drums are strong enough, which is unlikey as weren't they changed to pressed components instead of cast to save money.

 

[merc07]

Thanks all,

Looks like I'll stick to the little extra torque I have from the DPT set with the eco parameters. Still be interesting to see what extra mpg can be had from a remap if your following the other thread...

http://mbclub.co.uk/forums/showthread.php?t=66651

Cheers
Adam

 

[Buggerlugs]

Hi Adam,

The gearbox will handle the DPT power setting without trouble. I'm a DPT installer and auto trans specialist, I've done loads of 'em. The TCM adaptive cells will adjust the shift fill times and overlap pressures to match the increased throughput and the gearset hardware is up to the job.

The only way it would fail under these circumstances is if the gearbox was "on it's last legs" prior to installing the DPT power settings. HTH.