Check out my latest Audi 90 quattro GTO tune

I just built my 3rd Audi (1989 Audi 90 quattro IMSA GTO, R-class) and would like to get some feedback on this tune. It’s very good on LeMans (Full and Old Mulsanne), the recently released Nurburgring (North Loop and NL+GP), and Alps (prefer Festival & fun at Stadplatz).

If you get a chance to give it a ride, please let me know which track and time posted. General feedback on the tune would be appreciated! Thanks!

GT = RelaxedPRKid, file = PRKid speed

RPRK, I needed a higher class car to run at NBRing so I’ll be glad to give it a go at some of those tracks.

That would be great…please let me know how it goes and some feedback on the tune would be good. Thanks!

I’ve downloaded the tune last night but due to my personal issues I did not have chance to do any runs. I think it was topped up in the P class so I expect a lot of pants soiling in this car . . .

No problem GRD! Yes, topped out, yet, can still challenge in the class. Needs a much better driver than me though, lol.

Thanks! Trying it out now.
Meow be with you.

I might be the worst driver in the world, so take this with that in mind.

The steering is a bit stiff, maybe just a tad too high Camber? (down 0.2 - 0.5 notches)
Back end slides a little to easy, maybe too high rear end Caster? ( down 0.2 - 0.4 notches).
Or you could dink around with ARBs, but they always send me into another two day loop of tuning and driving.

I don’t know if the feedback helps or if it is just my driving style that sucks beyond a great tune.

ALL feedback is welcome Kitty, thanks!
I’ll check into the set of items you mentioned. The steering, yeah I can see that (and feel it somewhat), I think I have the caster angle (this is what you meant, not camber correct?) around default (4+)…will also look at this.

I personally did not get any sliding of the rear end, so, that one could be my driving style (versus yours), yet, not sure. I’ll still check. BTW, what track did you run? You meant “too high rear end camber” correct!!

I think the ARBs are pretty much set, and, as you pointed out they are hard to dial in. Yet, a couple of notches to test might suffice.

Again, thanks for the feedback!

I always mix up the caster and camber words, but it looks like you figured out what I was trying to say.
I ran them all to be sure.

If the starting telemetry can be trusted it looks like your front camber is -3.5 and rear is -3.0.
Maybe that is too much of a difference and is causing the front end tires to lose grip (I can hear the tires lose grip and I can see it in the telemetry, front tires trying hard to hang on because of back-end issue) and the difficult steering.
Try rear camber at -3.2 and caster in the 5.7 to 6.3 ballpark for giggles. (or bring the front closer to the rear, -3.3 either way same fun factor)
In real life (which this isn’t) I read that Tire configuration can physically interfere with the ARBs, but I’m no expert.

Woah, I just noticed, your front and rear springs are topping out at 100%. eek.

Again I have not a clue what I’m saying, I just like jumping on the seats and playing with the mirror toys.
:slight_smile:

Thanks Kitty!

I may have been mixing up 2 different cars that I am working on at the moment. Do not recall going that high (negative) for this car, let me check.

The springs I usually go low (very close to bottoming out), may need a little room.

Have you read this entire thread. Great stuff in there.
Race car suspension Class

Thanks Kitty! I had seen this awhile ago, good refresher…taking another read through it. One of the challenges is…how car actually acts/performs “in-game” versus real life and the analyzed settings. Thus, many times, requiring some and/or significant adjustments per feel to get what one wants.

Updated file shared!

Steering is much improved, but I can easily keep the springs at 100% on the pretty much the whole alpine track. All the curves. Even flipped a few times :slight_smile: weeeeeeehaaaaa
Front wheels are still losing grip in telemetry.

I deleted the tune from my car, reset to defaults, searched for your name, downloaded and installed the “new” tune.

Thanks for checking it out!

I’lI check out the springs again.

Front Grip - could be since I have it set to min Aero. Will play with that as well.