I am wondering which one of these has more parasitic drivetrain loss for the hp. Can someone direct me to a dyno graph of a stock .2 manual turbo? And then maybe a separate graph for a stock .2 PDK turbo? I'm having trouble finding this. Mostly everything I find is .1 manuals.

 

nothing?

 

As both are essentially manual boxes I'd imagine the difference was pretty small. Never seen anything though.

Plus the losses from a gearbox are pretty complex; it's not just X% or Xbhp etc. so any figures may either be impossibly complex or over simple.

 

Both are not manual boxes, the PDK is automatic clutch. Which makes is a lot quicker switching gears.

The rpm and turbos will not lose as much momentum when the clutch is engaged with an automatic gearbox. While the manual gearbox will lose boost and rpm due to human slowness pushing in clutch and letting it out manually. This doesn't make any difference to drive train loss though. All though loss of hp and torque would be quite a lot of difference and dyno graphs would so be able to show that difference.

 

Just a WAG, but I believe the losses are close enough to not matter.

The power flows from the engine to the rear wheels through essentially the same hardware. That one transmission has a dual multi-disc wet clutch and the other transmission has a traditional single disc dry clutch doesn't change that.

A Tip would have some additional loss since it has a fluid coupling through which power/torque must flow.

jumper5836's point is I think valid. The PDK equipped car could feel quicker, could be quicker, due to faster shifting transmission. Even though the drivetrain losses are close enough to not matter the PDK equipped car could be the faster car.

 

I said essentially manual. PDK is not a torque-converter auto slushbox type gearbox; I assume that was what you were thinking of.

 

jem7v, I though you sold your 997 turbo....