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255/35 Fronts - 275/35 Rear upsets VDC

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255/35 Fronts - 275/35 Rear upsets VDC

Old 08-16-2018, 08:39 AM
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350nis
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Default 255/35 Fronts - 275/35 Rear upsets VDC

Fronts on 9.5" rim
Rear on 11" rim
Tyres are Toyo R888R

According to VDC Happy calculations the OD difference is 2.2% which suppose to be fine,

What can be the problem ?

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Old 08-16-2018, 09:24 AM
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Originally Posted by 350nis View Post
Fronts on 9.5" rim
Rear on 11" rim
Tyres are Toyo R888R

According to VDC Happy calculations the OD difference is 2.2% which suppose to be fine,

What can be the problem ?
18s or 19s?

If you're running 35s on 18s, it's possible the whole combination is upsetting the ECM because wheel speed is higher than factory heights. Not probable but possible. If 19s, you should be good.

Did this just happen right AFTER you made a change or was it OK for a while then went South? If latter, possibility is that one or more of your wheel speed sensors has gone awry.

Last edited by MicVelo; 08-16-2018 at 09:26 AM.
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Old 08-16-2018, 09:58 AM
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Originally Posted by MicVelo View Post
18s or 19s?

If you're running 35s on 18s, it's possible the whole combination is upsetting the ECM because wheel speed is higher than factory heights. Not probable but possible. If 19s, you should be good.

Did this just happen right AFTER you made a change or was it OK for a while then went South? If latter, possibility is that one or more of your wheel speed sensors has gone awry.
18" Rims
As far as i remmber it started someday while driving.

i should check wheel speed sensors then ...
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Old 08-16-2018, 12:12 PM
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Should work, but what exactly is happening
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Old 08-18-2018, 09:57 AM
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Originally Posted by terrasmak View Post
Should work, but what exactly is happening
Now after some testing i can narrow it to 1 scenario that happen all the time:

VDC ON or OFF (no effect)
When turning right while braking (tail braking)
The car is applying ABS

It is not happing when I'm turning left with braking or turning both directions without applying brakes at all.
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Old 08-18-2018, 12:36 PM
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Steering angle sensor is probably out of adjustment. The system works with VDC on or off, that’s why mine is 100% disabled on my track car
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Old 08-18-2018, 11:57 PM
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Originally Posted by terrasmak View Post
Steering angle sensor is probably out of adjustment. The system works with VDC on or off, thatís why mine is 100% disabled on my track car
I will check it, just got NDS with OBD Cable ...

How did you disabled VDC without disabling ABS?
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Old 08-19-2018, 10:18 AM
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Yaw sensor is disabled, search for “yaw”
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