Previous Thread
Next Thread
New Reply
Print Thread
Joined: Dec 2003
Posts: 487
GTS2003BLK
Senior Member
GTS2003BLK Mar 17, 9:58pm - #419414 

Senior Member
2003 Toyota Celica

Joined: Dec 2003
Posts: 487
Portland, Oregon
Wheel diameter n ODO speedo calibration?

So from the dealership you can get a Celica with 15, 16, and in the case of some of the special editions 18 inch wheels;

I know this must have an effect on odometer and speedometer calibration. What kind of adjustments do they make at the dealership to compensate for this?
Joined: Nov 2002
Posts: 489
CRBN BLU
Senior Member
CRBN BLU Mar 17, 10:35pm - #419415 

Senior Member
2002 Toyota Celica GT

Joined: Nov 2002
Posts: 489
Hampton, VA
I'm very interested in the responses you get for this. My speedometer is all f-ed up. I have 17's, which started the problem. Now, the speedometer reads 12% too fast. If it says I'm doing 70, I'm really only going 62. I even paid to have it calibrated, but the dude said there was no way to correct it to read right since the car is so new. I'm with you though, Toyota has to know how to correct it, but I don't want to pay a dealer to do it.

[Linked Image]
"Everything that has a beginning, has an end."
-The Oracle
Joined: Jul 2004
Posts: 777
ExNihilo
Cold Warrior
ExNihilo Mar 19, 5:04am - #419416 
Cold Warrior
2004 Toyota Celica GTS

Joined: Jul 2004
Posts: 777
Tempe, AZ
Short of getting a custom speedometer, I haven't heard of any way to fix it.

300,000 KM/Sec. Its not just a good idea, its the law.
Joined: May 2004
Posts: 409
sweetnuts4sale
Senior Member
sweetnuts4sale Mar 19, 8:05am - #419417 
2002 Silver Toyota Celica
Senior Member
2002 Toyota Celica

Joined: May 2004
Posts: 409
Charleston, SC
there was a link in ecelica about this it was a calculator that converted from the rim and tire size from before an after swapping shoes.

i know someone in here has the link... ... just wait...
Joined: May 2004
Posts: 409
sweetnuts4sale
Senior Member
sweetnuts4sale Mar 19, 8:08am - #419418 
2002 Silver Toyota Celica
Senior Member
2002 Toyota Celica

Joined: May 2004
Posts: 409
Charleston, SC
oh yeah you can alway "ghetto" fix it by riding beside your boy while his driving beside you telling when he gets to a certain speed talking on the cell and you can recalibrating your speedometer like that


^^^ sorry about the run oon sentence. i'm drunk
Joined: Dec 2003
Posts: 487
GTS2003BLK
Senior Member
GTS2003BLK Mar 19, 9:29am - #419419 

Senior Member
2003 Toyota Celica

Joined: Dec 2003
Posts: 487
Portland, Oregon
Yeah I've seen the calculators:

http://www.paspeedo.com/calculator.htm

https://www.celicahobby.com/tech/speedcalc.html

But there must be a way that Toyota re-calibrates the computer on the special editions that have 18 inch wheels.

Another one of their guarded trade secrets I guess.

http://www.toyota.com/motorsports/spotlight/widebody.html
Joined: Jun 2004
Posts: 264
GT4
Member
GT4 Mar 19, 11:06am - #419420 

Member
1993 Toyota Celica Alltrac

Joined: Jun 2004
Posts: 264
Boston
It's not only the wheel diameter that hurts the speedometer, but the "overall wheel+tire" diameter that hurts it. If you keep the overall diameter close to the stock size, there will be ver little effect on speedometer. For example stock GTS 205/50/16 has a diameter of 24.07 inches. With 215/40/17, new diameter will be 23.77 inches. Speedo error is only 0.75 mph when you are driving at 60 mph.

[Linked Image]
93 ST185, 91 ST185 (sold), 99 Solara SEV6
Boston
Joined: Jun 2003
Posts: 2,863
v3n0m
Specialist
v3n0m Mar 19, 3:52pm - #419421 

Specialist
2001 Toyota Celica GT

Joined: Jun 2003
Posts: 2,863
St. George, UT
TIRES.COM

They tell you what tire to run to keep the odometer close to OEM...you can order tires them...and they're pretty cheap, too.
Join the conversation - Register now or Sign in to add your comment


Moderated by  isaac 

Customize Your Toyota CelicaPrivacy Policy · About · Contact
CelicaHobby.com is an independent Toyota Celica enthusiast website. CelicaHobby.com is not sponsored by or affiliated with Toyota Motor Sales, USA, Inc. in any way. The Toyota and Celica names and logos are trademarks owned by Toyota Motor Sales, USA, Inc.
© CelicaHobby.com, 2001-2016