[HELP] Iriz Rear End Hopping

^pomen_GTR^

7,000 RPM
Senior Member
May 13, 2010
7,509
1,690
1,713
The Mines
Updates:

Readjusted tire pressure back to stock recommended settings.

Have been driving in and out for one week, rear skipping during cornering at commoner's speed (30-40km/h)is still noticeable.

Any advice please?
have u tried running the tyre pressure i've recommend above?

or try this pressure instead: 180kpa~200kpa max
 

6UE5t

6,000 RPM
Senior Member
Oct 8, 2010
6,756
1,300
1,713
Kuala Lumpur
Yeah skipping usually means it's a bit too stiff, can be from the suspension and/or the tires. Now since your suspension is still stock and normally stock suspensions are pretty soft already, then most likely is the tires, probably too high pressures and/or rubber too hard with poor grip performance.
 

vr2turbo

Beyond 20,000 RPM!
Helmet Clan
Moderator
May 11, 2010
29,998
8,385
1,713
Petaling Jaya
Yeah skipping usually means it's a bit too stiff, can be from the suspension and/or the tires. Now since your suspension is still stock and normally stock suspensions are pretty soft already, then most likely is the tires, probably too high pressures and/or rubber too hard with poor grip performance.
Well, other likely chance is stock suspension jammed?
 

DNGFashion

Known Member
Thread starter
Apr 20, 2017
95
14
508
Maybe I will go to ftuned to have the suspension system check and also at the same time check for any tyre failure.

Personally, I found that the stock tyre is incompetent

Will get back to everyone soon.

Thanks.
 

^pomen_GTR^

7,000 RPM
Senior Member
May 13, 2010
7,509
1,690
1,713
The Mines
stock tyre is silverstone....definately it was on the stiff sidewall....


thats why i'm recommending lower tyre pressure than stock....
 

DNGFashion

Known Member
Thread starter
Apr 20, 2017
95
14
508
stock tyre is silverstone....definately it was on the stiff sidewall....


thats why i'm recommending lower tyre pressure than stock....
Yeap I have tried your recommended tyre pressure, still it skips during cornering:confused:
 

sweelt

2,000 RPM
Nov 6, 2016
2,306
248
663
Penang
try open irix rear door. try sit/ press (left and right side) and see hows the rear suspension move up/down. Fast or slow.
Might be one side of the shocks/absorber give way.
 

6UE5t

6,000 RPM
Senior Member
Oct 8, 2010
6,756
1,300
1,713
Kuala Lumpur
Well, other likely chance is stock suspension jammed?
Maybe I will go to ftuned to have the suspension system check and also at the same time check for any tyre failure.

Personally, I found that the stock tyre is incompetent

Will get back to everyone soon.

Thanks.

It's a relatively new car so should not yet have suspension problems, let alone jammed suspension. If it does though, sorry to say that means the car quality is crap! I still think most likely is due to the shitty stock tires.
 

vr2turbo

Beyond 20,000 RPM!
Helmet Clan
Moderator
May 11, 2010
29,998
8,385
1,713
Petaling Jaya
To us is likely the tyres or suspension. Since tyre reduce air pressure still like that , that is why maybe need check suspension....lol
 

^pomen_GTR^

7,000 RPM
Senior Member
May 13, 2010
7,509
1,690
1,713
The Mines
Yeap I have tried your recommended tyre pressure, still it skips during cornering:confused:

Then next tyre change u can look into more comfort tyre category...


or to my earlier suggestion, change into a softer rear springs...


i believe that u were looking for better comfort?
 

vr2turbo

Beyond 20,000 RPM!
Helmet Clan
Moderator
May 11, 2010
29,998
8,385
1,713
Petaling Jaya
Iriz original tyre size should be 175/65R14, tyre should not be that hard being 65 series aspect ratio?
 

DNGFashion

Known Member
Thread starter
Apr 20, 2017
95
14
508
Personal check on suspension system: seems normal being not too slow and not too fast.
Tyre pressure: I have adopted the recommended range by pomen_GTR
Tyre: 195/55/15 silverstone, which I believe is a terrible tyre.

I'm actually prefer sport handling with little stiff ride.
 

vr2turbo

Beyond 20,000 RPM!
Helmet Clan
Moderator
May 11, 2010
29,998
8,385
1,713
Petaling Jaya
Personal check on suspension system: seems normal being not too slow and not too fast.
Tyre pressure: I have adopted the recommended range by pomen_GTR
Tyre: 195/55/15 silverstone, which I believe is a terrible tyre.

I'm actually prefer sport handling with little stiff ride.
If using 195/55R15 there are many tyre choices......:driver: