GR Yaris Alignment, Camber and handling related talks

micsub said:
With OE suspension layout, Rear camber changes as you adjust toe unfortunately. The only way to allow independent rear camber adjustment from the toe adjustment, is to replace the top arms by adjustable ones, or use specific camber bolts which are cheaper and quicker to adjust the rear camber.
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Yeah but I was hoping some degree of adjustability would be possible on the rear...somehow.

I'll run this setup for a couple of months and if I'm not convinced I'll fit two 90105-17015 bolts on each corner to get even more camber front.
 
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micsub said:
With OE suspension layout, Rear camber changes as you adjust toe unfortunately. The only way to allow independent rear camber adjustment from the toe adjustment, is to replace the top arms by adjustable ones, or use specific camber bolts which are cheaper and quicker to adjust the rear camber.
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It seems to be quite random though, with similar toe and bolt I have -2°27' front and -2.0° rear, quite symmetrical...
 
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Yohz78 said:
It seems to be quite random though, with similar toe and bolt I have -2°27' front and -2.0° rear, quite symmetrical...
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YEs it is quite random one car to the other. Fronts I have camber adjustment possibility with the Tractive suspension, so I can do what I want, (I like it @ -2.5°) but on the rear with OE arms and all I didn't have the same camber on each side. Only solution was to install the Proflex camber bolts to be able to adjust camber at -2° on both sides.
 
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micsub said:
YEs it is quite random one car to the other. Fronts I have camber adjustment possibility with the Tractive suspension, so I can do what I want, (I like it @ -2.5°) but on the rear with OE arms and all I didn't have the same camber on each side. Only solution was to install the Proflex camber bolts to be able to adjust camber at -2° on both sides.
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Guess I've been Lucky then... I have -1° 59' rear left and -2°01' rear right
 
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I think I'm going to spend a bit more and get some DNA adjustable top mounts for the stock suspension instead of f*#@ng around with camber bolts.

Any recommendations to adjust the rear suspension? Something more serious and "definitive" than camber bolts if possible.
 
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Hardrace make a Camber Arm.

www.hardracesuspension.com.au

REAR UPPER CAMBER KIT GR YARIS 2020 GXPA16 MXPA12

REAR UPPER CAMBER KIT TOYOTA GR YARIS '20-, GR COROLLA '22- LEXUS NX '21-, UX300E '18-, TOYOTA RAV4 PHV '19- - HARDRACE
www.hardracesuspension.com.au www.hardracesuspension.com.au

Chamber Arm.webp
 
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DeanoC said:
Here is where I'm at (left) right now. I experimented again with rear toe out after having the suspension done thinking removing a lot of the roll and stiffening it up would make that behaviour more predictable and controllable but I was wrong.

I also have whiteline rear bolts but couldn't get more rear camber - both people tried. Only added .3 for me - must be the lowering.

Oh this is just one bottom camber bolt up front. Less chance of it moving. The rest is from the DNA top mounts including the improved caster adding over 1 degree to total 7 degree.


View attachment 2441
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Did the rear toe in help with stability under heavy braking? As I currently have very similar specs to you. But more camber and neutral toe at rear. And I think I’ll go minor toe in. The rear feels like it wants to dance under brake and lift off oversteer
 
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I had toe in at the front and toe out at the rear and it was too skittish under brakes and general turn in. Same toe in front and rear and it is far more stable. Was manageable at the track but was sketchy on the road and could easily catch you out if an animal jumped onto the road etc.
 
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