Hi, it’s me again. I’ve been trying to tune another car and I’ve run into a problem that is the same as I’ve had with a few other cars. This time I’m tuning the 2015 Corvette Z06, but last time I had this issue was on the Lancia Stradale 037.
It appears that I’m having an issue resolving and diagnosing the turning aspect of the car. It seems that at high speed the car will turn like a tank, and will max out on its turning radius at about the apex of the turn, and like that the car drives straight into the wall if you don’t use the handbrake. The only other solution to this is to slow down to about 50 mph (sorry if you’re a metric user), but that isn’t very impressive for an S1 class car that I’m trying to tune to be competitive.
Essentially I’ve already tuned the camber and differential, along with the gearbox respectfully. The car still doesn’t want to turn hard, and the only other thing I know how to do is lower the ride height, soften the anti roll bars, soften the springs or tighten the rear of the springs. I play on console and use the Xbox one controller. How would I diagnose and resolve this issue in the future?
Hello. Are you also having this problem at lower speeds? If not, then increasing front downforce and/or decreasing rear downforce can help. Also, soften up the front suspension and stiffen up the rears more. BTW, making these changes will have you retune camber. Another tip is to try using wheel. Using too much steering input can make it understeer. BC a wheel has more precision with steering that may help.
I’ll try it when I get home
Whats the build you are using?
Upgrades:
AWD Powertrain
No Aero
Stock Tire Compound
325mm Front Tires
335mm Rear Tires
Race Clutch
Race Transmission
Race Driveline
Race Differential
Race Springs
Front and Rear Anti-roll bars
Roll Cage
No weight reduction
Race Fuel System
Race Camshaft
Race Engine Block
Sport Flywheel
Tuning:
30/30 Psi
Final Drive: 3.4
1st: 2.89
2nd: 1.99
3rd: 1.49
4th: 1.16
5th: 0.95
6th: 0.79
Camber: Front -0.2; Rear -0.5
No Toe Adjustment
5° Front Angle Caster
17 Front Anti-roll bar
19 Rear Anti-roll bar
791.3 Lb/in Front Springs
730.3 Lb/in Rear Springs
Ride height: 3.6in Front/3.8in Rear
8.8 Front Rebound Stiffness
8.1 Rear Rebound Stiffness
6.5 Front Bump Stiffness
5.9 Rear Bump Stiffness
490 Lb Rear Aero
45% Front Acceleration
10% Front Deceleration
70% Rear Acceleration
35% Rear Deceleration
70% Balance towards Rear
If you’re using “normal” steering you might want to try the “simulation” steering (under controller settings somewhere). Not sure if it’s relevant to horizon or just Motorsport, but I’ve read simulation steering can help with turn in problems, because the normal setting kinda dampens your steering input iirc.
Another kinda random maybe relevant thing; I was reading about the irl Z06 the other day, it apparently has a somewhat unique steering setup (something with its Ackerman geometry). I think it’s possible they modeled the car in game with less angle or something than other cars to match its irl counterpart.
^by the way this is all reasonable informed conjecture, but I did mess with that car a bit the other day after reading one of your other posts, and it did feel below average in tighter corners.
Corvettes have almost no Ackerman correction. They should turn in better at high speed and worse at low speeds compared to a car with Ackerman.
I play with all settings on Simulation
Note: I’m having this problem with multiple cars, not just the Corvette.
Most cars that seem to have this issue are also all wheel drive except my Bel Air (which is a drag car anyway). So, I’m wondering if there is some correlation with that, or maybe the issue is an upgrade I’m putting on these cars.
Add front aero or remove the rear aero.
How much does the car weigh? That’s a lot of spring.
Copy this sheet to your Google drive and enter the weight and distribution. Try 2.5hz ride frequency for full aero or 2 to 2.2 hz for no aero.
https://docs.google.com/spreadsheets/d/1iWcYonZNbOZA6N1w6y7qjK6B6EUo98MufapvST8Xj0Y/edit?usp=sharing
I will take a look at this
Edit: This sheet could use some better organization and use simpler terms, but thanks anyway.
OP try these settings:
Tire pressure 28.5 28.5
Camber -1.6 -1.4
Toe 0.0 0.0
Caster 5.0
Anti-roll bar 22.44 21.61
Springs 723.1 725.6
Ride height 4.3 4.3
Rebound 12.6 12.3
Bump 5.1 4.9
Aero 293
Brakes 52% 125%
Diff front accel 74%
Diff front decel 0%
Diff rear accel 100%
Diff rear decel 74%
Diff distribution 75%
Final drive 3.57
Gears stock
I tried your tune first at Festival Circuit and my settings work definitely better here.
Tune is straight out of QuickTune H4 btw
I’ll be sure to try them
Edit: These settings worked really well, but I kept my gearing in there. Thanks.
-0,2 front camber is way too little and you lose grip cause of it. Try these :
Camber: Front -1.2; Rear -0.7
No Toe Adjustment
6° Front Angle Caster
For A class I use 5 to 5.5 Caster.
I will also look at this too.
Thank you all for the support.
Okay, so the Corvette works really well now, but it’s not the only car I have an issue with. Instead of giving you guys all the cars, how about you give me some tips to help me correct this problem in the future? I’m still trying to learn how to tune cars.