What does that 'Visco electronic lock' thing do? (In layman's terms
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The 'Visco Electronic Lock' or '
Viscous Electronic Lock' is of sorts a Limited Slip Differential that resides between the front & rear wheels. So only found on 4WD vehicles.
Why the need for a Limited Slip Differential (LSD)?
When a car is travelling in a straight line (perfect road conditions) ALL four wheels are rotating at the same speed, as it should be & NO differential is required (e.g Drag racing).
Now consider what happens when the car is negotiating a corner. The outer wheels have to travel (spin faster) a greater distance than the inner wheels. With NO differential the inner wheels spin at the same rate as the outer wheels resulting in the car wanting to go straight on, severe understeer (Being simplistic here). Hence we need a LSD on each driven axle, sitting between the Rear Near Side drive shaft & Rear Off Side drive shaft in a RWD car for example. This allows the outer & inner wheels to spin at a different rotational speed when negotiating a corner.
Yeah I know that, but what does the Viscous Electronic Lock do?
Firstly I think Shift is being simplistic with the term 'Visco Electronic Lock' probably to cover a variety of 4WD & AWD cars in Shift.
Where an LSD resides between the drive shafts on a driven axle, the Viscous Lock (deliberately omitted Electronic) resides between the the front & rear wheels (prop shafts). This controls the amount of power/torque distributed between the front & rear wheels. When power is applied the Viscous Lock constantly senses the spin speed of the front & rear wheels. If for example the front wheels are spinning faster (wheel spin/loss of traction) than the rear, the Viscous Lock applies more power to the rear wheels until the front wheels spin speed matches the rear wheels & so on. When front & rear wheels spin speed matches the Viscous Lock applies power evenly 50/50 front & rear.
The scale 'Low to High' in Shift tuning dictates the amount of power you want to distribute to the wheels with the most traction. This is the 'Electronic' (or software mapping) part of the term used by Shift IMO. As I see it Shift has merged two technologies into one to keep things relatively simple.
As we know the Lancer Evo's, Imprezza's & Skyline's have tremendous grip levels in this game. I believe this is due to this 'Electronic' setting. It could also be controlling wheel spin rate by applying the brakes to any wheel via the anti lock braking system without any user input.
You all still awake LOL