Could some one help I’m not a greatest at car setup but I give it a go.
All my cars Seam to understeer at slower speed. What is the best way to tune a car to stop this. My car setups are ok for grip. It’s just the understeer on the slower corners that is really catching me. Our so the arb’s need to be stiff. My cars the set up more to the soft side. Ride hight is ruff 4/5 clicks up from min and suspension is More to the soft side.
Any help would be good. As I said I’m not the best just want to learn to get better.
My car tunes I have done will be up online my the weekend my gamer tag is Ooo chrisp ooO if you want to see what I have done so far.
Thanks again.
if you posted a little more details such as the car build/tune.
It could be a number of things.
-Not enough front tyre width
- caster too high
- front end too soft causing roll instead of turning
- front too stiff causing understeer instead of turning
- entering corner too fast and understeering
- decel diff to high
Without more information theres not much we can tell you.
I am by no means a tuning master but from what little I do know, if you’re having an understeer problem, soften the front anti-roll bar.
If your understeering then your front grip is not OK. Check your front suspension like Baby Cow suggested. You could try these setting on your alignment, they seem to work pretty well for me across most cars - caster 5.7, front camber -1.5, rear camber -1.0. If the car seems unstable lower the caster to 5.5 and recheck your tire temps for camber. Always check the telemetry for even tire temps across the tires in the corners, and I like to shoot for about 200 degrees at race temp. If those look good and it still doesn’t handle properly then it’s more likely a suspension issue.
Or driving… people are often quick to blame their setup for their driving.
Sorry for the lack of in 1st post. Was at work car set ups are
1st car VW Scirocco 11
B Class FWD
Tyres 255 Front 285 Rear Race compound
Tyre Pressure 27 / 27
Camber -1.4 / -1.6
Toe 0.4 / 0.1
Caster 5.8
Anti Roll 10.32 / /18.11
Springs 446.7 / 486.4
Ride Height 4.5 / 5.0
Rebound 7.8 / 5.0
Bump 4.4 / 4.7
Downforce 100 Front wing only
Brake 47%
Breake Pressure 120%
Diff Acc 50 Dec 15
2nd Car 99 Elise Sport 190
B Class AWD
Tyres 195 Front 235 Rear Street compound
Tyre Pressure 27 / 27
Camber -1.4 / -1.5
Toe 0.4 / 0.1
Caster 6.6
Anti Roll 16.31 / 10.31
Springs 216.4 / 384.4
Ride Height 5.3 / 5.3
Rebound 4.7 / 6.7
Bump 3.1 / 5.1
Downforce 145 Rear wing only
Brake 46%
Breake Pressure 120%
Diff Front Acc 50 Dec 15
Diff Rear Acc 60 Dec 10
Blance 52%
3rd Car Acura Interga
B Class Fwd
Tyres 245 Front 255 Rear Sport compound
Tyre Pressure 27 / 27
Camber -1.4 / -1.6
Toe 0.4 / 0.1
Caster 6.0
Anti Roll 10.32 / 16.61
Springs 395.2 / 476.7
Ride Height 6.0 / 5.3
Rebound 7.2 / 5.2
Bump 4.0 / 4.8
Downforce 100 Front 145 Rear
Brake 47%
Breake Pressure 115%
Diff Acc 70 Dec 20
All 3 tunes i have put up online
Any Advice would be good
Following are my suggestions (guesses more like) without actually driving the car:
- Toe’s are not really necessary. On a FWD large toe out (+0.4) would hamper the handling. Start at 0.0/0.0 front/rear then only adjust as a last resort.
- FWD Dec should be 0 or close to 0. Anything 10 or higher has tendency to create understeer.
- FWD Accel needs are sensitive. On low power FWD, high accel diff works well but on high power FWD (200 hp+) a balanced approach is better (continue to lower until you feel good grip coming out of corners). I’m currently using about 50% or so.
- It also helps to have larger width front tires on high power FWD. The rear wheel width needs to be matched so the car does not oversteer from excessive cornering grip difference between the front/rear.
Other numbers look pretty respectable to me.
Just looking at the two FWDs your spring rates look relatively soft at the front. As above,the toe probably isn’t helping either. With the setups posted it looks as though you are getting the front of the car to do too much work. I would also raise the tyre pressures a bit to get better performance under load out of the tyres. I haven’t tried the Elise as AWD but my guess is you would have to turn it with the throttle anyway.
Why less front camber than rear.
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Your front suspension is too soft, raised them a little. Its ok to have reverse arb’s but make sure that your front suspension can support the weight from braking and the weight push on the exterior springs when turning.
On all the set up you posted, the front bump is a lot softer than the rear. Raise them also. Put them equal to the rear and start from there.
One thing that i do though is i never have my front springs softer than the rear for front engine cars, except for mid engine rwd cars. That might be one of the main cause.
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How did I miss that? I agree.
My guess is that your compensating your oversteery at high speeds with your springs there for making your slow speeds a little understeery and high speeds a little oversteery. Your car is unbalanced with no f wing.
Try making rear wing min downforce
Camber is too low
Toe is unnecessary
Rear decel too high in fwds
Rear rebound too low (try 9ish)
Rear sway seems kinda low (try 20-30 in fwd)
Not sure why 27/27 tire pressures. I doubt your rear tires are heating up.
Max front aero is unnecessary except for mega grip tracks.
Everything else is hard to tell without testing.
Are you experiencing understeer at corner entry, mid-corner or on acceleration out of the corner?
Corner entry understeer might mean you’re simply going too fast or your slamming your steering inputs too abruptly.
Mid corner might be a suspension setup or driving style issue. You have to determine how you drive and tune accordingly. Some people are heavy on braking and corner entry, turn quick and get the car pointed out of the corner quickly to start accelerating. Some people are slightly less aggressive at corner entry, balance the car through the corner using throttle inputs and then roll on the power through the apex.
Personally I prefer a car that will rotate ever so slightly as I accelerate out of a turn, which aids in pointing the car away from the outside of the corner. Some cars simply won’t do that (too much power or too much front weight bias).
Figure out your driving style and tune accordingly, keeping in mind that everything you adjust is a compromise. You might gain a certain advantage with one particular setting but you’ll lose an advantage somewhere else.
If you’re experiencing understeer accelerating out of the corner: with FWD it might be a weight\spring setting or your differential isn’t set properly. Keep in mind that understeer may be caused by too much weight being transferred off the front wheels too abruptly or the differential locking both wheels together too soon and forcing your tires to compromise grip. The way I understand it is you can tune the diff to lock more aggressively, but you’ll lose grip or you can tune it to spin one wheel more aggressively - which will kill your acceleration but minimize your sliding.
With RWD it might be that your rear has more grip than your front wheels, which results in your car’s front end being shoved to the outside of the corner… This can be managed through better corner entry, diff tuning or either stiffening up your rear springs, or softening the front springs.
Again, driving style may play a larger role in what you’re experiencing.