DCT vs. Manual Drivetrain Losses

[Sticky]

I did some research on this as I have a DCT and also some people were spreading false information. I contacted the manufacturers as well as experts in the field and also overlaid a dyno between a supercharged DCT M3 and a supercharged manual M3. Same dyno, same fuel, same SC, same everything.

I forgot to post this here but I thought some of you might enjoy it: DCT vs. Manual Drivetrain Losses

[John Beckham]

Great write up

The question now though is:

Does the shift speed of the DCT makeup for the deficit of HP loss in the mechanics?

in other words.

In a drag race between these two identical cars, would they be even or otherwise since the DCT shifts faster than a manual?

[constantin]

Originally Posted by John Morgan Evans

Great write up

The question now though is:

Does the shift speed of the DCT makeup for the deficit of HP loss in the mechanics?

in other words.

In a drag race between these two identical cars, would they be even or otherwise since the DCT shifts faster than a manual?

Not sure what would happen in a drag race. However on the track the DCT is a few tenths faster. Over a 20 + lap race it is significant, yet in the real world it all depends on the driver.

[Sticky]

Originally Posted by John Morgan Evans

Great write up

The question now though is:

Does the shift speed of the DCT makeup for the deficit of HP loss in the mechanics?

in other words.

In a drag race between these two identical cars, would they be even or otherwise since the DCT shifts faster than a manual?

Sorry for the late response.

Yes, the shift speed more than makes up for slight drop in efficiency.

In a drag race, the DCT should be slightly quicker and more consistent.

[lemansbluem3]

Constantine! thanks for all the information today my friend! i was wondering, how can I improve the response time of the DCT i feel it lags at times.

Thank you!
Rahul

[Sticky]

Originally Posted by lemansbluem3

Constantine! thanks for all the information today my friend! i was wondering, how can I improve the response time of the DCT i feel it lags at times.

Thank you!
Rahul

Do you have updated dct software from the dealer?

[lemansbluem3]

Hoe can I check if it is updated? I got my service late last year like in august

[Sticky]

Originally Posted by lemansbluem3

Hoe can I check if it is updated? I got my service late last year like in august

Your service advisor should be able to tell you. Your paperwork from that service would also say something.