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Re: Power split ratio
Yes, I think it tries to anticipate wheelspin before it actually happens. Just like getting power mode to come on requires that you press the gas pedal quickly. It's looking for the TPS voltage signal to change very quickly, not just change. That way it can send power to the back wheels preemptively.
But still, that's only one input. There's still the two speed sensors for the front and rear wheels that it can compare, the speed that the car's actually going, the position the shifter is in, and maybe something else. It's more complicated than just "front/rear 90/10 normally and 50/50 if it's slipping".
The 30/70 number you're probably thinking of the VTD (euro/aussie/jdm) type of trans which is rear-biased and which only got to the US in later subarus with the phase 2 4EATs.
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'94 Laguna Blue LSi ~159k .......JDM ultra short-geared 3.900 STi Version 7 6-speed w/ Cobb shortshifter, ECUtune 244,8.1mm/256,9.1mm i/e cams, group N motor mounts, '97 grille, JDM clear corners, Momo JDM Legacy GT steering wheel, apkarian's LED tails, silver STi BBS wheels, PWR radiator, redstuff pads f/r, drilled/slotted rotors, bontragerworks rsb #18, Koni/GC 450f/375r coilovers, Megan Racing adjustable lateral links, KMac c/c plates, Stebro exhaust, ECUtune 1v5, Optima battery in the trunk where it belongs. Turbo project
'97 Ebony LSi ~137k #036 .......Power mode mod, JDM clear corners, BBS wheels. AUX/pocket mod
Now a mod "over there"  ............Photo album
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