I get that problem with my stock Kumhos. The rear of this car has a tendency to bounce a little over rough roads, and in turns it has a tendency to "skip", if that makes any sense. My previous car had this issue too. Frankly, I just think they need to relevel the road and repave it.

 

Well I theorised the whole thing. With 185/65r14s your have chunky side wall tires and gives the car "roll" so when doing sharp corners the sideways motion is turned into "roll" of the tires, with some bouncing yet not much sliding. With 205/40z17s there is about an inch of rubber for sidewall. So when doind a sharp corner the sideways motion has nowhere to go since the tires can't roll as much so it creates less traction on the back and once you hit a dip or a bump it makes the car slide more :thumbsup:. make any sense?

 

the car only weighs 2436lbs it will bounce no matter what kind of pothole or crack you run over

 

idk. but, my car feels good around corners. I understand how it feels around corners though. You are right. I don't know the reasoning though.

 

no weight on the back, and the solid rear axle. I've gone skidding in town, dirt roads, snow, highways. you get used to it, and learn to avoid it.

 

I got really good at "drifting" before so when it slide out it was second nature lol. However instead of recovering right away i kinna made the slide a but longer for show lol. When i went to the tune shop this morning and asked them they told me it will happen if you push the tires to the max since they can't roll sideways

 

well, my christmas holidays are always a parking lot rager at 40K.

 

I'm going to teach my gf (the owner of the car) how to slide and control the car this winter, last winter she slide out a couple times and ended up into snow banks lol then call me to come tow her out

 

take a trip to Japan to learn proper technique of drifting


this is how i do it left turn corner flick the steering to the right and flick it back to the left quickly pull handbrake and release and full throttle and control the slide with proper oppisite lock and right amount of throttle to keep it going

 

called the scandinavian flick.

 

QUOTE (TwitchAutoSystems @ Aug 14 2009, 05:57 AM) index.php?act=findpost&pid=256043

called the scandinavian flick.

thx my english horrible no good cant spell that 11 letter word

 

it's ok, I'm partly Scandinavian

 

QUOTE (catlin_cava @ Aug 12 2009, 10:31 PM) index.php?act=findpost&pid=255645

Well I theorised the whole thing. With 185/65r14s your have chunky side wall tires and gives the car "roll" so when doing sharp corners the sideways motion is turned into "roll" of the tires, with some bouncing yet not much sliding. With 205/40z17s there is about an inch of rubber for sidewall. So when doind a sharp corner the sideways motion has nowhere to go since the tires can't roll as much so it creates less traction on the back and once you hit a dip or a bump it makes the car slide more :thumbsup:. make any sense?

yes.

I dont know how much the 14" steelies + tires weigh, but if the 17"s weigh more, that is more weight the suspension is trying to control and keep in contact with the pavement. if they are a few pounds heavier thats more work for the suspension and could be another reason for the wheel hop you describe when you hit bumps.

you should have a lot more precise traction with the 205 width 17's though up until you hit that bump though.

 

QUOTE (omg grip @ Aug 16 2009, 07:42 AM) index.php?act=findpost&pid=256461

yes.

I dont know how much the 14" steelies + tires weigh, but if the 17"s weigh more, that is more weight the suspension is trying to control and keep in contact with the pavement. if they are a few pounds heavier thats more work for the suspension and could be another reason for the wheel hop you describe when you hit bumps.

you should have a lot more precise traction with the 205 width 17's though up until you hit that bump though.

I find the weight less, The tires only weight about 5lbs if that. and the rims are only 15lbs. They weight alot less then the 14s

 

WOW 15lbs, that is great for a 17 inch rim, what brand/model is it?

 

JZ Racing, They are one of the lightest rims i've seen. And the best part, only paid 600$ for them lol tax included

 

QUOTE (catlin_cava @ Aug 12 2009, 08:22 PM) index.php?act=findpost&pid=255612

We just put a set of 205/40Z17 Falken ZIEX ZE-912 on the car, I was going around a hairpin turn, Rated at 30MPH and i was clipping close to 65mph when i went into it. I hit a small crack in the pave and it made the back of the car "hop" and it broke loose and slide, I was able to keep the car under control to recover it.(Made some smoke from the back tires:whistling: ), I've taking that corner at that speed before with a Protege with 205/50z16 and NEVER had that problem.

Slip angle is your "problem". Not really a problem, just that you changed the dynamics of your car when you went to low-pro tires.
http://www.auto-ware.com/setup/slp_hndl.htm

 

ya this happened to me to,but in the rain. i made a thread about it cuz i almost crashed :/