If you already having problems with sensors, then you won't see a Slip light related to tire size, would you?

If you have VDC/TCS and your front tires are taller than the rears (26.8 vs 26.5) you will get the Slip light if your VDC/TCS is functioning properly.

 

You know the cam position sensor has nothing to do with the vdc and tcs computer right? If my vdc tcs wasn't working then I'd have the lights on. Not working includes faulty sensors and sensor signals. I'm not going to argue anymore. This setup works and my car is my proof.

 

https://my350z.com/forum/7805376-post8.html

If your car works with that setup, more power to you. You are the 1 in a million fluke. Either that or TCS/VDC is screwed up. I'm betting on the latter.

For the OPs benefit, here's a few threads you can read through. The common theme in all of them is TCS/VDC, Slip light and front tires taller than rears.

https://my350z.com/forum/maintenance...rmentilly.html
https://my350z.com/forum/6750632-post8.html
https://my350z.com/forum/wheels-and-...bou-tires.html
https://my350z.com/forum/wheels-and-...yone-else.html
https://my350z.com/forum/wheels-and-...-question.html
https://my350z.com/forum/wheels-and-...els-crazy.html
https://my350z.com/forum/wheels-and-...l-porblem.html
https://my350z.com/forum/maintenance...indicator.html

 

i think u mean 245/30-20

 

so any one know what screw they were talking about?

 

Are you reading any of this? Go back and read post #11

Have you tried any of the other suggestions, like checking the bolt pattern on the front wheel, trying to mount a rear wheel on the front? With the info posted here, you should have had this figured out in 10 minutes.

 

AGAIN!! All you have to do is take a bigger drill bit and drill the holes bigger!! Prob solved!! UNIQUE AUTOSPORTS does that all the time!!!

 

There is a bolt on the front rotor so you cant fit the rear rims on the front by accident. You need to remove this bolt to fit your rims on the car. The bolt is in a metal sleeve and sticks out like half inch.

[IMG]<a href="http://media.photobucket.com/image/350z front rotor/blair_lyons/Akebono Install/103_1128.jpg?o=1" target="_blank"><img src="http://i298.photobucket.com/albums/mm250/blair_lyons/Akebono%20Install/103_1128.jpg" border="0"></a>[/IMG]

 

Drilling the holes out won't help if the bolt pattern is wrong. He doesn't need to try something that drastic until he know for sure that's the problem.

 

usually i'm all about helping out a brother but with out pics and/or a clear explanation...................This dude is lost........


Please, slowly walk away from the car............call a tow truck or road side assistance in your city and ask how much for a service call and have the dude help you when he shows up at your house/driveway.

Pay him in cash for wasting his time after he fixes it for you or explains what you did wrong/purchased wrong if the hole pattern isnt right.....

Cause anyone that knows anything about mounting a wheel will know whats up when they do it for you..

-J

 

Dave, you should know me better than that...

 

My bet is this dude is not removing the front bolt........whos with me on that....??

SILLY BOLT ON YOUR HUBS WHEN INSTALLING SPACERS - FRONT WHEELS ONLY:

See the two each attached pics(about 6 O-clock position)..........the bolt is there so you don't rotate your OEM(FACTORY) wheels front to back, but it needs to be removed to install after market wheels of any kind. It's perfectly ok to remove this bolt! Proceed with wheel install.

bolt you must remove:


bolt removed:



-J

 

 

Well, he claims that they bolts and holes don't line up. If it was the extra bolt, then the stud would go through the holes but it obviously wouldn't mount flat. I'm still betting on "wrong bolt pattern"

 

My bet is this dude is not removing the front bolt........whos with me on that....??

yup! ill try as soon as the weather clears up its snowing down here thanxz for all the help guys

 

I love how you are trying to blame two well documented problems (Cam Position Sensor Failure, and ABS problems with SPC A-Arms) on my tire size. If you had read the entire thread you would know that the problem was caused by the ABS sensor physically touching the sender hub, which the tech. had incorrectly shimmed.

As I stated, after replacing the CPS Bank 1 and correctly shimming my ABS sensors all lights went off. These were two seperate incidents which occurred years after having put this size tire on. I'm not sure what you are gaining by trying to discredit me but I don't like how you are using half truths to prove your point.

Just to prove my point because I'm sick of your misinformation.

Tire 1 - 245/35R20
Tire 2 - 275/30R20
Tire 3 - 245/45R18 <-Stock Front Rays
Tire 4 - 245/45R18 <-Stock Rear Rays

Rim Diameter: 20 in 508 mm
Rim Diameter: 20 in 508 mm
Rim Diameter: 18 in 457.2 mm
Rim Diameter: 18 in 457.2 mm

Overall Diameter: 26.75 in 679.45 mm
Overall Diameter: 26.49 in 672.84 mm
Overall Diameter: 25.97 in 659.63 mm
Overall Diameter: 26.68 in 677.67 mm

Allowable Difference = 3% Max


Tire 2 - 275/30R20 and Tire 3 - 245/45R18 <-Stock Front Rays
*This will account for the smaller Overall Diameter of the new rear tire over rear stock rays.

(26.49-25.97)/(26.49)
= 1.963%

Tire 1 - 245/35R20 and Tire 2 - 275/30R20
(26.75-26.49)/(26.75)
= 0.972%

1.963% + 0.972% = 2.935% Difference

Like I said before...there will be no issues with his setup! If he can ever mount the wheels

 

You lost me on what you are trying to show with your math. The OP has the following tires for his car:

245/35/20 front - height is 26.75"
275/30/20 rear - height is 26.50"

Front is taller than the rear by 1/4", and the VDC system won't like that, as they don't even like it when the tires are the same height.

 

+1 This issue has been well documented and verified over the years on both the Z and G.

gyotar, if you are not having this issue with those tire sizes you are either not driving your car hard enough or you are an exception instead of the norm.

 

If you assume there can only be a 3% difference between front and rear, as provided earlier in the thread then the math works. The larger fronts, balances out with the smaller rear to keep it within 3% of each other.

It's hard to argue with everyone saying I'm wrong though. I doubt my car is an exception.

Is there only a problem upon launching or hard cornering? What should I be looking for? I drive it pretty hard, but don't track it or anything like that.

 

Yup, you certainly proved your point.