Need help with RWD traction

[Travis Wills]

I have a 2019 RWD GT2 Stinger and I have trouble maintaining traction when launching the car from a stop. I have good treadlife on my current set of Michelin PS4 tires on the stock weight 19" wheels. Would going with a different tire in the same size help the RWD traction? Would going to the PS4(S) tires help? What about a lighter weight wheel? Would that help or hurt the traction?

I have been considering the ASA GT14 wheels with the PS4S tires. They weigh 25.5 lbs so about 10 lbs less than the stock wheel. My plan would be to only replace the rear wheels when I am sure I am going to be launching the car. I would probably bring the new wheels and tires with me to the track and swap them out there. Are there any issues with the TPMS sensors and swapping out the wheels/tires at the track? Do you need a TPMS reset tool to reset the TPMS sensors with the car each time? Can you run the tires without TPMS sensors in them?

Just curious what other people have done to improve their RWD traction?

Here are the wheels I am considering. They have a 35mm offset for the 19x8.5 wheel. Since the stock rear wheels have a 46.5mm offset do you think the 35mm offset will be an issue?

https://www.tirerack.com/wheels/WheelCloseUpServlet?target=runWheelSearch&autoMake=Kia&autoModel=Stinger+GT&autoYear=2020&autoModClar=&initialPartNumber=GT149854BMF&i1_Qty=2&wheelMake=ASA&wheelModel=GT14&wheelFinish=Machined+w%2FBlack+Accent&wheelFinish=Machined+w%2FBlack+Accent&showRear=no&packageFlow=false

 

[General_Vodka]

I have heard that suspension mods may help. Like the diff brace and spings.

 

[Ozstung]

I have a 2019 RWD GT2 Stinger and I have trouble maintaining traction when launching the car from a stop. I have good treadlife on my current set of Michelin PS4 tires on the stock weight 19" wheels. Would going with a different tire in the same size help the RWD traction? Would going to the PS4(S) tires help? What about a lighter weight wheel? Would that help or hurt the traction?

I have been considering the ASA GT14 wheels with the PS4S tires. They weigh 25.5 lbs so about 10 lbs less than the stock wheel. My plan would be to only replace the rear wheels when I am sure I am going to be launching the car. I would probably bring the new wheels and tires with me to the track and swap them out there. Are there any issues with the TPMS sensors and swapping out the wheels/tires at the track? Do you need a TPMS reset tool to reset the TPMS sensors with the car each time? Can you run the tires without TPMS sensors in them?

Just curious what other people have done to improve their RWD traction?

Here are the wheels I am considering. They have a 35mm offset for the 19x8.5 wheel. Since the stock rear wheels have a 46.5mm offset do you think the 35mm offset will be an issue?

https://www.tirerack.com/wheels/WheelCloseUpServlet?target=runWheelSearch&autoMake=Kia&autoModel=Stinger+GT&autoYear=2020&autoModClar=&initialPartNumber=GT149854BMF&i1_Qty=2&wheelMake=ASA&wheelModel=GT14&wheelFinish=Machined+w%2FBlack+Accent&wheelFinish=Machined+w%2FBlack+Accent&showRear=no&packageFlow=false

Wider tyres would certainly be the first step. I don't think lighter wheels will help. My cars tyres spin more now that ive ditched the heavier oem wheels.

 

[MerlintheMad]

If you've been running A/S tires instead of high performance then that is your main problem. Stickier tires first, then go wider. TPMS missing shouldn't cause any issues at all; you just won't have TPMS capability. A lighter rim will "help" get more tire spin, because less weight to get moving in the first place means faster power laid down.

 

[Oryan]

Don't underestimate the impact suspension and chassis mods can have on traction. Primary downpipes and a JB4 are coming soon..we'll see how these things do after that but so far, my setup is holding traction well enough. Not a dead hook, especially now that it's cooling off, but there isnt much aside from a chirp and barely a wiggle.

 

[Hilleagle]

Part of the issue you face is a good handling set up doesn't necessarily translate to good traction off the line.

A softer rear suspension set up and a raised ride height help transfer weight to the rear of the car during launch, hence placing more weight on the rear tyres, improving traction.

Not a good look or feel for a stinger.

The lighter wheels help unsprung weight, so have big impact on ride and handling, but I don't believe they will significantly improve traction, although wider rubber will. If this is for track work, slicks will help massively, as you increase your rubber contact patch, but definitely not for the road.

There may be changes that could be made to the LSD, but you are getting beyond my knowledge with that.

Good luck

 

[Spaceme17]

If you want better traction, you need rear tires with better traction. Simple as that.

 

[Travis Wills]

If you want better traction, you need rear tires with better traction. Simple as that.

Ultimately, torque to friction is the issue. I can increase friction with better tires but I could also reduce torque simply by using a tire with a larger sidewall profile. Essentially that is the same thing as changing the gearing. Gearing doesn’t affect horsepower so you aren’t actually losing any acceleration potential. However, utilizing slightly less torque would go a long way to helping traction.