odometer is off!!

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03-27-2007 | 06:29 AM

#21

ryuji16

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Joined: Jan 2007

Posts: 567

From: Baldwin Park, CA (626)

Quote:

Originally Posted by bB2NER

Quote:

Originally Posted by Gsnorgathon

I've often wondered if the odo is off by about 3% because the USDM tire (15/185/60) is about 3% smaller than the JDM tire (15/185/65).

I'm not sure about that, but the service manual for the xB specifies that the speedometer be calibrated so that it reads about 3% too fast.

Ding Ding Ding. We have a winner. You are exactly right. The spedo is calibrated for the bB which comes with 185/65/15's. That is why it reads 3% higher. Just add 3% to your miles when doing MPGs and you will be right on.

hmm... if this is true, then maybe i should size my tire according to the jdm size when i get new rims/tires... would that make sense?

03-27-2007 | 06:32 AM

#22

surfcity40

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Joined: May 2005

Posts: 2,366

From: HB, CA

Re: odometer is off!!

Quote:

Originally Posted by TheRealBoxster

I used my sisters gps system in my car yesterday. I reset my trip meter and the gps meter and then did my daily trips that I need to make. My odo was 1/10 off compared to the gps.
So when I got home i recalcuated some of my old gasoline receipts. My mpg whent up amazingly.
xxxGALLONS xxxxTANKxxxxxMPG AVERAGExxxxxre-adjust x .10 new mpg
xxxx9.542 xxxx316.5 xxxx33.2xxxxxxxxxxxxxxxxxxx 36.48
316.5 *.10=31.65
316.5+31.65=348.15
348.15/9.542=36.48
Am i correct in my math? I sure hope im correct for once

dude...if it's off it's off....jmo

03-27-2007 | 06:39 AM

#23

ryuji16

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Joined: Jan 2007

Posts: 567

From: Baldwin Park, CA (626)

nvm, this thread answered my question

https://www.scionlife.com/forums/vie...light=odometer

kinda wierd that the odometer would be messed up in the opposite direction as the speedometer. who the hell was in charge of calibrating that anyway