What is the maximum power the B8 S4 DSG can handle?

[Akrion]

Hi guys,

For some reason forums best friend did not provide enough answers and information regarding the 3.0T DSG limits.
The more I look into upgrades the more I see the DSG as a concern since it’s is more or less a “Black Box” and it either works or not … but what are the limits of it in terms or power it can handle?

I see 325ft-lbs as the number thrown around … but it does not seem that high to me. Any thoughts on this would be greatly appreciated.

[Fourplay]

Hi guys,

For some reason forums best friend did not provide enough answers and information regarding the 3.0T DSG limits.
The more I look into upgrades the more I see the DSG as a concern since it’s is more or less a “Black Box” and it either works or not … but what are the limits of it in terms or power it can handle?

I see 258ft-lbs as the number thrown around … but it does not seem that high to me. Any thoughts on this would be greatly appreciated.

Considering the fact that a stock B8 has 325 lb-ft. of torque, I think your number is wrong.

[Akrion]

You are correct ... I was looking @ the 2.0T DSG Number ... sorry about that. I corrected it.

[CJ_S4]

I thought I read somewhere that its good for upwards of 500 lb-ft on the input shaft. It's buried in some thread here. Should be substantially higher than the output of our engine because I'm pretty sure they use an identical gearbox on the new S6 & S7 - which have the 4.0 twin turbo V8 putting out much more torque than the 3.0T.

[omegax]

I remember reading on wikipedia that, Audi 7 speed dsg have a torque limit of 450 ft lb. If you would like to know more about it just go on wikipedia and search for it.

[Vogz]

The usual culprit of drivetrain part failure is driveline shock, not torque.

You can apply A LOT of torque as long as it is applied smoothly.

Launching the car hard a lot will break the transmission much more quickly than added power.

[skiracerblah]

The DSG clutchpacks will start slipping beyond a certain torque point. The question is what amount of torque can the clutchpacks handle.

[Vogz]

The DSG clutchpacks will start slipping beyond a certain torque point. The question is what amount of torque can the clutchpacks handle.

This is true, but it's a dual clutch which means LOTS of friction surface area. Clutches with lots of surface area can typically handle lots of torque without slipping. I'm sure someone will eventually find out the limits. You're not going to find them "listed" anywhere though.

[tins5]

any tuned guys having issues with the clutch packs? It's probably too early

[wwhan]

any tuned guys having issues with the clutch packs? It's probably too early

Only the 6MT cars so far, due to high RPM launches.

[ilspazzaneve]

I remember reading on wikipedia that, Audi 7 speed dsg have a torque limit of 450 ft lb. If you would like to know more about it just go on wikipedia and search for it.

"It has a torque handling limit of up to 600 N·m (440 lb·ft), and engine power outputs of up to 330 kW (450 PS; 440 bhp)."
http://en.wikipedia.org/wiki/Direct-Shift_Gearbox

Any 100-octane tuned B8 S4 will likely be slightly exceeding the power output limit advisory already, without ill effect.

[well_armed]

Now that the S6/S7 guys are flashing their cars well above the 500 mark, is it safe to say our DSG boxes can handle it?

[Akrion]

Now that the S6/S7 guys are flashing their cars well above the 500 mark, is it safe to say our DSG boxes can handle it?

I think is too soon to say that with confidence no? I would not think the DSG would fail the first time they floor the pedal ...

[IceAero]

I think is too soon to say that with confidence no? I would not think the DSG would fail the first time they floor the pedal ...

I drove the DSG on my chipped MKV GTI fairly hard for 100k miles and really it performed identically over those 6 years. I'm not sure which failure mode would be incited by too high of a torque load over time. Presumably the clutch just start to wear too fast? I think some people have had the clutch packs replaced. That wouldn't be cheap, but would it be that much more than a clutch and flywheel replacement on the 6MT? Thanks to our fancy dual-mass flywheel...

[well_armed]

Remember that the S6/7 stock power numbers are pretty good, and they would have never dropped it in there if it diddnt work.

Or did they beef it up for those cars?

[drob23]

There's got to be a reason they go with the ZF 8 speed AT on the S8/RS7? Maybe the return on investment in building burlier DSG's just isn't in the cards for Borg Warner/Audi.

[S4Pilot]

I've done a little research on the subject of DSG power limits. While there aren't any exact numbers of what the particular model in the B8/8.5 S4 can handle there is a wealth of knowledge on how to make a DSG stronger. Bottom line, I will not put one single power mod on my car unitl someone figures out how to retune the mechatronic. Engagement should be firmer, redline should be comparable with the 6MT and available tunes, and for gods sake somebody make "M" mode function the way we all know it should.

[well_armed]

I am confident my car can handle the increased power. I've wailed on it for 5K miles without a single glitch.

[ahcow]

I remember reading that it is rated at 450lb of torque.

[wwhan]

I remember reading that it is rated at 450lb of torque.

Looks like 550NM at 9k RPM (406 ft-lbs)

http://www.audizine.com/forum/showth...?highlight=dsg

[easytreez]

Has anyone ever compared a dyno of a stock DSG vs 6MT? I would have to assume the 6MT has the upper hand as far as drivetrain loss.

[mrmomo313]

I am confident my car can handle the increased power. I've wailed on it for 5K miles without a single glitch.

+1 I've wailed on mine for 45k miles with no issues, just the occasional 1-2 hangup

[PitchS4]

no one can know that

[mrmomo313]

and available tunes, and for gods sake somebody make "M" mode function the way we all know it should.

I know seriously can't believe there hasnt been a software made to prevent auto upshift since the release of this car, wish it would behave like bmw M cars

[well_armed]

Any way we can look up the part numbers for the DSG box, S4 vs. S6?

That would be the final verdict if they are using the same transmission...

[s4buckeye]

Any way we can look up the part numbers for the DSG box, S4 vs. S6?

That would be the final verdict if they are using the same transmission...

They could be the same exact box as far as performance limits, but they might still have two different part numbers between the models to account for slight differences between the models not affecting those limits.