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ZUKIWORLD Discussion Forum => Suzuki 4x4 Forum => Topic started by: Digger on April 25, 2005, 03:58:29 PM

Title: Correcting Speedometer?
Post by: Digger on April 25, 2005, 03:58:29 PM
How do you correct the speedometer after adding larger tires? I know that 5.83's would do it, but I'm looking for a cheaper option...
Title: Re: Correcting Speedometer?
Post by: HotRod on April 25, 2005, 04:56:16 PM
You can look up a SpeedO shop in the phone book and they can regear your speedo.
Title: Re: Correcting Speedometer?
Post by: HUMZUKI on April 26, 2005, 05:11:14 AM
Keep searching. Theres a thread somewhere on how to adjust it. Then post a link. Im getting frustrated tring to find it. >:(


I just found out mines off 17MPH :o with 5.14 gears the oldschool tranny (higher 5th) and 33's and I need to tweek it. My buddy just turnt the pointer a bit to try to compinsate,,, but the faster he go's the more he's off.
Title: Re: Correcting Speedometer?
Post by: keith on April 26, 2005, 06:26:36 AM
My speedo is actually more accurate since getting bigger tires!  It read about 5 mph high with the stock tires.  With the 235's it is right on up til about 60 mph.  After that it starts to read a little slow.

Title: Re: Correcting Speedometer?
Post by: Digger on April 26, 2005, 06:37:10 AM
Well, my friend and I went for a ride the other day, him in his sammy running 215-60's and me running the Silver Surfer(31-9.50's). We reset the trip odometers withing 2 miles of eachother and after a 40 or so mile ride, he was registering 42 miles and I was registering 32 miles. Now I know if I had reset mine at the same time, it would have come out 42 to 34, but that's still a pretty big difference and is one of the potential reasons I went from getting 26-27 mgp to around 18-19 after swapping tires...
Title: Re: Correcting Speedometer?
Post by: zukisuzi on April 26, 2005, 12:16:13 PM
I'm gonna try this when all my changes are done. Check it out:

http://bbs.zuwharrie.com/content/topic,15339.0.html

Here is the pic from the 9th post down:
(http://bbs.zuwharrie.com/content?action=dlattach;topic=15339.0;attach=4043;image)

Good Luck!  ;D
Title: Re: Correcting Speedometer?
Post by: jzap on April 26, 2005, 01:31:53 PM
Way back in the '70's, during my rallying days, people used a little gear box on the back of the speedo that you could change the gears in to obtain the correction factor for tire and gear conditions.  I think they were outlawed when someone figured out you could bump the correction factor to 50% and only register half the mileage you were actually putting on the car.  I wonder if you can still find those things anywhere?
Title: Re: Correcting Speedometer?
Post by: azrocktrash on April 26, 2005, 02:25:51 PM
Quote
I'm gonna try this when all my changes are done. Check it out:

[url]http://bbs.zuwharrie.com/content/topic,15339.0.html[/url]

Here is the pic from the 9th post down:
([url]http://bbs.zuwharrie.com/content?action=dlattach;topic=15339.0;attach=4043;image[/url])

Good Luck!  ;D



  that works only so much.
   with 33s.5.89-1 and 513s my speedo is good up to 25 mph.after that my road speed is 5 mph slower that speedo reading up to 60 on speedo then it goes to about 7 mph slower.
    the wifes is the same with 31s and 462 r/p and stock t-case.
      oscar