RRE Season 7 (2020) Race Room DTM & TC'92 Cup - Zhuhai - Mar 26

[phspok]

Hmm didn't realise you could adjust the diff with these.... I just click the front roll bar up one, and the rear ARB down one
and they mostly become drivable. Perhaps set the front and rear dampers comp to 3 front, and rebound to 7 or so
dilute to taste. I was finding the little beemer, which I think is what Pete was driving to spin if I went into a corner
too fast, so nasty lift off oversteer, I would have set the coast diff higher and the power diff lower if I had realised you could

[frex]

I would have set the coast diff higher and the power diff lower if I had realised you could

You can't, you can only adjust diff pre-load, I guess that's what Pete is referring too.

I've just had a go in it, and I agree it's a tricky little bugger.. I think some of that entry oversteer is down to the brake balance being set a little too far rearward. A couple of clicks forward helped to bring a little stability, at least for me. The power delivery is also a little peaky, and can lead to bit of unpredictability when it comes on cam. Changing the gear ratios to bring them a little closer together made it a lot more drivable (again, at least for me - setups can be very personal things..!). Once I had made those changes I actually found that reducing the diff pre-load (and so inducing a bit more lift-off oversteer) was then beneficial. A few other minor tweeks and for me it was faster and more stable. Couldn't match my Mustang times, but it would be competitive on tracks with more corners and less straights.

[frex]

Full setup in case you want to give it a go Pete, maybe it helps:







(Rear end tab not shown as that was just stock except for same 0.3 PSI tyre pressure difference as on the front).

[picnic]

Thank you, as you've gone to that much trouble it would be rude not to at least try again 

I didn't really struggle too much with entry over steer it under braking was more under power coming out of the corner. I would sometime lose it late in the corner with the back end coming around long after I was off the brakes. But generally I was ok, it was corner exit when I was near a curb or grass as I could never predict what would happen, and never catch something when it did go wrong. I'm sure my still weak left leg is not helping here but I do like predictability in my car

[phspok]

Set the rear ARB one click or more softer, st the front ARB one or more clicks harder and see how it feels
set the rear damper compression to be about 3 and leave the front, or also set the front rebound about 3/4
whatever the nmbers are. will cure losing the back end on corner exit, then try putting stuff back one
click at a time

[picnic]

Thanks

[phspok]

That was "three quarters" of whatever the number are. Like Geoffs guide set the rear compression low
front rebound high. If I can drive these things you can 

[BillThomas]

I posted this a few weeks ago to help some of the GTL racers here, I guess it applies equally to RRE.
 
'I have a setup guide that I printed out from NoGrip many years ago that I use. I will reproduce the main part of it below, it may help some of you. I have another much more comprehensive one that I obtained from another website, but I find it a bit too confusing so rarely consult it. Before using this guide you really need to determine where the car is not responding as you would like.

Here it is:

Understeers into corner
Soften front bump
Stiffen rear rebound
Soften front springs
Harden rear springs

Oversteers into corner
Stiffen front bump
Soften rear rebound
Harden front springs
Soften rear springs

Understeers mid-corner
Soften front roll bar
Stiffen rear roll bar

Oversteers mid-corner
Stiffen front roll bar
Soften rear roll bar

Understeers on exit
Soften front rebound
Stiffen rear bump

Oversteers on exit
Stiffen front rebound
Soften rear bump

Caster – more generally helps turn in but you can go too far, keep increasing until it feels like it is not improving then go back a touch.

Tyre pressures – even temperature spread across the tyres when hot.

Camber – set so that tyre temps are a few degrees hotter on the inside.

Front toe – a little negative at the front helps turn in.

Rear toe – more positive helps to control oversteer, use 0 on low powered cars.

Brake bias – Keep moving to rear to help turn in until car gets unstable on the brakes, then go back a couple of percent towards the front.'

Obviously more modern cars have much more adjustment than the old cars in GTL, but I think it gives the basic ideas.

Thanks Geoff a useful aide memoir, using it have transformed the cars for tonight’s races into drivable race cars instead of oversteering brutes!