Originally Posted by
Marcika
Hi,
Can I get a bit more explanation how diff position effects the car handling and why?
I never changed the "position", just realized this setting change on 419x. I just used for tightening the belt, 1 or 2 step change from KIT setting on 419.
Thank you
Marton
It has to do with the rotating mass of the diff high or low. The higher the rotating mass on a car the higher the cog.
If you change cog you have to tune your roll center too. The result is more or less grip on the affected axle.
Other effect and the most important, is the geometry of the axles (angle of the dogbones). If you lower the diff, you have less on power traction, because the affected axle wants to straighten itself out and press the arm/tire into ground, when you accelerate. If you raise the diff, the effects are vice versa.
It's one of the many tuning options the car offers to you. But tuning the height of diffs is one of the last fine tuning options I would do. Better do the right basic setup first...tires, springs, shock oil, hinge pin blocks etc.
Regards.