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Somewhere I probably still have the dealership training white paper from xDrive introduction.
M have different bias, 0:100, FWD are 100:0.
everything else is. 40:60.
Period.
Programming schmogamming. The actual code might vary but the results being output are identical despite hardware differences.
40:60. And if I remember my fact sheet, that changes over 100 mph to more like 20:80 for improved stability.
And it works pretty fine.
You aren’t saving hardly any power by adjusting the bias to 0:100, you are still powering all the extra rotating mass... just using the ground to do it indirectly instead of the driveshaft.
I could see this being useful for burnout contests and Dyno pulls. And that’s about it.
I thought I’d hate the awd, but it’s pretty good.
I think the old viscous coupling was a bit smoother to engage. I’m sure with a less laggy turbo you could take advantage to really power thru the corners by applying power early and tightening the corner to let the car 4 wheel drift slightly under power on the way out. That’s how we did it on the “good old days” of viscous couplings and torsens
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