hey everyone. im trying to figure out what to do to get my car to be more safe and predictable during handling or on loose surfaces.
i
the car is wildly prone to snap oversteer and im trying to figure out why.
its on amr coils, 12k swifts front, 10k ebiach rears. white line sways F+R with perrin links both on middle hole, whiteline roll center kit, and 265/35-18 michellen PSS tires
ride height is like an inch down from stock. front a bit lower than rear.
no preload on my coils
-1.4 camber front 0 toe stock caster. -0.2 rear camber, 0 toe
dampers set to a click softer than right btwn full hard and full soft up front. rear is set to middle position.
on dry tarmac, it handles well. on the limit its snap oversteer
on slippery surfaces its a death trap. any steering input over 25mph, causes instant loss of rear grip. even at part throttle, if it hits any loose ground on both or one rear wheel, while going any direction but dead straight, it has the potential to instantly spin both rear tires and go into a slide.
im thinking about disconnecting the rear sway bar next time it snows, ive heard rally car teams do that.
any advice on what to change to make it more predictable and not snap over steer would help. thanks
i
the car is wildly prone to snap oversteer and im trying to figure out why.
its on amr coils, 12k swifts front, 10k ebiach rears. white line sways F+R with perrin links both on middle hole, whiteline roll center kit, and 265/35-18 michellen PSS tires
ride height is like an inch down from stock. front a bit lower than rear.
no preload on my coils
-1.4 camber front 0 toe stock caster. -0.2 rear camber, 0 toe
dampers set to a click softer than right btwn full hard and full soft up front. rear is set to middle position.
on dry tarmac, it handles well. on the limit its snap oversteer
on slippery surfaces its a death trap. any steering input over 25mph, causes instant loss of rear grip. even at part throttle, if it hits any loose ground on both or one rear wheel, while going any direction but dead straight, it has the potential to instantly spin both rear tires and go into a slide.
im thinking about disconnecting the rear sway bar next time it snows, ive heard rally car teams do that.
any advice on what to change to make it more predictable and not snap over steer would help. thanks
Dial in a little toe-in for the rear and get the rear sway bar on the soft setting. That should help. I'm running the same tire and can barely move my car around the driveway on an inch of snow. And, when it drops below 40* they turn into rocks with no traction on damp surfaces. You need to get some all season or snow tires if you really want to put it on the road. I can see why you'd be terrified trying to drive it in slick conditions.
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+ 1 its your tires. Also dial in some more negative camber while you are at it.Originally Posted by splattj
Dial in a little toe-in for the rear and get the rear sway bar on the soft setting. That should help. I'm running the same tire and can barely move my car around the driveway on an inch of snow. And, when it drops below 40* they turn into rocks with no traction on damp surfaces. You need to get some all season or snow tires if you really want to put it on the road. I can see why you'd be terrified trying to drive it in slick conditions.
Cool, ill give it a go. Thanks for the advice. I knew the tires are def a problem for slick surfaces, but i just felt like it can be somewhat better. its just crazy how much grip is there on dry tarmac, then on slick roads, its like a different car. Its by far the worst car ive owned as far as snap oversteer on slick roads. ive had an is300, 350z, ef and ek civics, all with suspension mods and they all had better predictability on slick surfaces.
One thing ill admit is my lack of skill when it comes to controlling a sudden loss of grip in a awd car with a system like the evo x. None of the techniques used with FR layouts work on this car. Everything in my brain tells me to counter steer and let off the gas in a unintentional slide. None of that works on the evo.
I really need to find a open area of pavement next snow day and try to get some wheel time. i understand how much weight transfer matters with controlling an awd car and i know i need to get better at threshold braking and throttle modulation.
As the car sits now, im at the point where im not going to drive it if theres any amount of snow or slush on the roads. I feel like its so unpredictable, im gonna end up in a ditch or into a guardrail and obviously, thats not ideal.
Anyone else on the east coast ready for spring?!?
One thing ill admit is my lack of skill when it comes to controlling a sudden loss of grip in a awd car with a system like the evo x. None of the techniques used with FR layouts work on this car. Everything in my brain tells me to counter steer and let off the gas in a unintentional slide. None of that works on the evo.
I really need to find a open area of pavement next snow day and try to get some wheel time. i understand how much weight transfer matters with controlling an awd car and i know i need to get better at threshold braking and throttle modulation.
As the car sits now, im at the point where im not going to drive it if theres any amount of snow or slush on the roads. I feel like its so unpredictable, im gonna end up in a ditch or into a guardrail and obviously, thats not ideal.
Anyone else on the east coast ready for spring?!?
Yes, the slick roads are exposing the issues with your suspension setup. Use what you're experiencing to dial things in so when you hit the limits on dry roads at higher speeds. You shouldn't experience snap oversteer at the limit so get things sorted ASAP.
As far as driving the car right now, the NHTSA put out a bulletin about the PSS tires:
These tires are ultra high performance, track capable summer tires. This tire has reduced capability below 5°C (40°F) and it is recommended that suitable winter tires be fitted below this temperature. Avoid driving or moving Michelin Pilot Super Sport ZP tires below -7°C (20°F) as operating at these temperatures can cause damage to the tires.
I lived in Gaithersburg for 12 years and there was really only 1-2 days a year, most years, where I wished I had snow tires but a good set of all seasons are really required for winter there. Summer only tires year-round just isn't realistic.
As far as driving the car right now, the NHTSA put out a bulletin about the PSS tires:
These tires are ultra high performance, track capable summer tires. This tire has reduced capability below 5°C (40°F) and it is recommended that suitable winter tires be fitted below this temperature. Avoid driving or moving Michelin Pilot Super Sport ZP tires below -7°C (20°F) as operating at these temperatures can cause damage to the tires.
I lived in Gaithersburg for 12 years and there was really only 1-2 days a year, most years, where I wished I had snow tires but a good set of all seasons are really required for winter there. Summer only tires year-round just isn't realistic.
Quote:
As the car sits now, im at the point where im not going to drive it if theres any amount of snow or slush on the roads. I feel like its so unpredictable, im gonna end up in a ditch or into a guardrail and obviously, thats not ideal.
Well duh, you are driving on UHP summer tires in snow and slush, what do you expect? Of course the car is all over the place.Originally Posted by OctaneTENgsr
As the car sits now, im at the point where im not going to drive it if theres any amount of snow or slush on the roads. I feel like its so unpredictable, im gonna end up in a ditch or into a guardrail and obviously, thats not ideal.