Road Holding is so bad

[murat]

My Sonic oversteer too much. You can see I cannot beat a Toyota Corolla on a curve even I have the advantage. My tires are Continental ContiPremiumContact 2.

 

[Anthony]

That's really surprising. I've never had oversteer issues in my RS. Was the road slick? What modifications have you done to the suspension? You might just need new tires.

 

[Smarjason]

I think it has to do with weight distribution at high speeds. The back end of these cars is so light weight it’s hard to keep it planted. Especially at high speeds, the slightest change when steering hard will make you lose the rear end.
I actually gutted the rear of my hatch to lose some weight and ended up almost drifting when I’d corner sharp on the track. Put it all back in to add some weight back. Ended up mounting up a rear diffuser in hopes for some downforce.
Super sticky tires might help, but I just think it’s the weight difference.
You can also add some camber to the rear wheels if you’re looking for more grip around corners.
Lower center of gravity would give you more grip.
Also, coming into the corner, understeer might get you. You want to hold throttle through the whole corner. If you let out mid corner, you’ll transfer weight and lose grip. Same with braking, if you brake after throttle in a corner, the weight will transfer to the front and you’ll oversteer as a result.
Hope this helps


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[JTee2017]

Lower the tire pressure a few PSI in the rear in relation to the front. Maybe 30 to 32 PSI. . HOT pressure in the rear.

Some newer tires that are also low cost are the General Exclaim HXP. . not the ECU which is discontinued although some stores still sell them.

The HXP is under $70 each at many stores. A cheap tires to beat the H@#@$#%! out of.

 

[murat]

Yes the road was slick but the Corolla still had better traction than me. The car is all stock. I've done 23k miles with these tires I know they are old now. Every time I take this corner I feel like I turn better than the other cars but this Corolla and the driver has suprised me.

The most expensive 195/65/15 tire is under 40$ in Turkey now(Michelin, Continental, Goodyear, etc). Trump wants to get pastor Brunson who is under arrested in Turkey for spying about the Turkey. Turkey resisted the US and he is still under arrested so US dollar setted a new record against the Turkish lira. Angela Merkel said we are at the side with Turkey and Qatar said we are giving 15 billion dollars to Turkey and today it's in control now. Yesterday it was 30$ for the most expensive tire

 

[92dakota]

ive noticed alot of differences in handling/steering between my parents LS(2015 15's) and my LTZ(2012 on 17's) but not sure if suspension is any different, but tires profile and width is alot different and probably has alot to do with it, now i never noticed anything out of the ordinary except going form the minivan to the sonic is like relearning to drive haha , even in the winter i found very little issues, but bare in mind its rarelly ever on highway speeds, mostly the 40-70km/h range ..

 

[JTee2017]

The handling on my 2017 Sonic hatchback is just fine. Holds corners and rides smoothly . .. once I got rid of the stock Hankooks. . . .

 

[Blue Moon Sonic]

You need to keep your foot on the gas while also modulating the brake at the same time with your left foot in order to keep the rear in check. That's the way with FWD cars. Though, these cars from the factory tend to lean a lot more on the understeer side of things and have a lot of body roll. I would say get rid of the 195/65/15 tire and upgrade to something sportier. Something like a 215/50/17 or a 205/55/16 will help you a lot more due to the wider cross section and the shorter side wall.

It also looks like it's not oversteering fully but rather has too much body roll and the tire is rolling onto the sidewall causing traction loss. It also looks like your going about 65mph (104km/h) around what looks to be a slight bend on a hwy.

 

[murat]

You need to keep your foot on the gas while also modulating the brake at the same time with your left foot in order to keep the rear in check. That's the way with FWD cars. Though, these cars from the factory tend to lean a lot more on the understeer side of things and have a lot of body roll. I would say get rid of the 195/65/15 tire and upgrade to something sportier. Something like a 215/50/17 or a 205/55/16 will help you a lot more due to the wider cross section and the shorter side wall.

It also looks like it's not oversteering fully but rather has too much body roll and the tire is rolling onto the sidewall causing traction loss. It also looks like your going about 65mph (104km/h) around what looks to be a slight bend on a hwy.

Yes I know what you mean but the car is diesel and I don't rev too much so it stays at the turbo lag zone. I can't control the back of the car with the throttle pedal, it hasn't enough power to do that. It can barely understeer the front tires even in the first gear.

I test drived a second hand LTZ with 16 wheels last year for replacing my LS. Yes I felt the difference in steering but the the car's condition wasn't good as mine. Gear shifter was loose, gear changes wasn't feel good, the engine sound was tumultuous compared to my LS. I bought my LS when it was brand new and I don't know what that car saw with the previous owner. I've found 16 LTZ wheels a few months ago but they sold before I get there.

 

[murat]

I saw a crashed Hyundai i20 at the same spot today. The driver lost the control over the car. So it's an asphalt quality problem.

 

[Sailurman]

Perhaps a testicular augmentation will help?

 

[murat]

Perhaps a testicular augmentation will help?

I had varicocele surgery from both testises when I was 12. Now they both keep enlarging but doctors said it's OK.

 

[murat]

It was a little bit more dangerous this time: