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      09-24-2008, 11:01 PM   #21
BavarianBullet
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Drives: 2014 Audi S5
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Quote:
Originally Posted by Driver72 View Post
Though these guys did it in the rain (which is a bit retarded), here's some runs between a 335xi and a 335i
The race from a dig, clearly the 335xi driver didn't launch it quite as hard as he could, as he could of/should of jumped 1-1.5 CL's easy in the rain.
But you can clearly see when traction is not an issue, the 335i easily pulls on the 335xi
That's the lighter weight, less drivetrain loss and better aerodynamics at work.

Lol- I'm not so sure about the whole aerodynamic drag thing. The Cd only changes from .30 to .31 from the not-so-huge .8" difference in ride height so I doubt you'd notice anything on the 1/4mi. In fact there are some nice free calculators http://www.gtechprosupport.com/support/AeroDragCalc.htmthat show it's a whopping 1.5HP difference in aero drag losses at 100mph.

I've no evidence to back it up but I think the drivetrain loss from Xdrive is also pretty exaggerated in people's minds. You'd probably see similar or greater losses at speed if your tire pressure was off a bit.

I can't argue with the 220lbs of extra steel vs the 335i that the 335xi totes around though; that's about 19 more flywheel HP you'd need to have to run similar to a 335i in the 1/4mi.

Now, back on topic: anyone have some good numbers we can put together in one place as a sticky for those wanting to know?

So far we have the fastest 6MTs at 13.31 for both the 335xi and 335i (good work both of you BTW!). What about you 6AT guys out there? Can you top a 13.31?
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