Differential in rFactor sim

[kensaundm31]

I was used to EA F12002 diff which was: 0-100%

low % means stable on corner exit, entry not so stable
high % means stable on entry, exit not so stable.

I had id set to 75%.

How do I replicate this with

Pump, power and coast?

[modbaraban]

In short:

You get power to control the differential while on throttle. You get coast to control the differential while off throttle. And you get preload to control the how quick is the transition between the two above.

Increase Power = Increase understeer under postive throttle
Increase Coast = Increase understeer under negative throttle
Increase Pump (4WD) Front wheels pull more than rear

Preload affects how quickly the transition between power and coast differential occurs. If you used a preload of '1' and slammed the throttle down you would get a very quick transition to whatever your power percentage was, the reverse would happen with taking the throttle off. With a higher preload the above effect would be a lot more gradual.

from SetupMatrix

So if you have the same % for power and coast then preload is irrelevant according to the above quote.

[kensaundm31]

Thanks modbaraban.

So reading that I reckon I'll set it to

power 20% = oversteer?
coast 20% = oversteer?
pump 0% N/A

preload 1

Hopefully that will mean oversteer on entry and exit.

[modbaraban]

Well it depends, but lower % means more oversteer. So yes 20% will oversteer more than say 80%. Separate tunning of power and coast allows dealing with corner entry and exit behvior individually. That's really beneficial.

[Metar]

I'd say lower % means more wheelspin, but not necessarily more oversteer. Theoretically, it'll mean the least loaded wheel just spins senselessly.

I can't comment on rFactor specifically, but in GP4 and LFS, and for what it's worth, Gran Turismo 4, it usually works well with the Coast set rather low, since you'll want the wheels to comply easily when braking into a turn, and have the Power set, depending on track and car, so you can safely get on the power near a turn's exit without the outside wheel losing traction - just remember, turn it too high and it's effectively a locked differential (which, oddly, works well in LFS, but that's a glitch in the physics).