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speedo correction with 31's
Posted: Wed Jun 28, 2006 1:18 pm
by unfinished
on my 89 vitara i want to know what to use to correct the speedo with the 31 in tyres on it
cheers
Posted: Wed Jun 28, 2006 1:45 pm
by suzukiboy
GPS.................
I have used a Garmin GPS to see what the difference is, with 30" on my Vit the speedo is out by 8klms at 100klms.
Posted: Wed Jun 28, 2006 4:09 pm
by gecko270
Posted: Wed Jun 28, 2006 7:44 pm
by robsjimny
Isn't an 89 cable driven speedo.
Rob
Posted: Wed Jun 28, 2006 10:24 pm
by bushpig59
GPS worked for me its 10 kms the dif on the 30" BFG's
Posted: Thu Jun 29, 2006 9:02 am
by unfinished
yeah i would assume its cable driven so i was wondering if there was a different gear to put in the drive cable
Posted: Fri Jun 30, 2006 3:44 pm
by lay80n
On my zook i just worked out what speedo speed to do certain road speeds then wrote it on a bit of paper taped on the dash
Layto....
Posted: Sat Jul 01, 2006 11:54 am
by 12uke
I work my 94 LWB on 11%
Posted: Sat Jul 01, 2006 12:18 pm
by Gwagensteve
unfinished wrote:yeah i would assume its cable driven so i was wondering if there was a different gear to put in the drive cable
not as far as I am aware, but a good speedo shop will sell you a ratio box that will correct he speedo.
It depends why you are doing it. If it is for an engineers cert, you will need the ratio box. If it is for your own use, buy a cheap GPS and stick it on the dash, then you won't get lost and wont be speeding.
My guess is that you will change tyres again eventually and the ratio box will be wrong again. a GPS is always right!
Steve.
Posted: Sat Jul 01, 2006 12:37 pm
by nicbeer
I believe u can get adjustable speedo boxes
VDO ratio box. i think the part no. is 12415
nic
Posted: Sat Jul 01, 2006 7:24 pm
by Bad JuJu
Go to
http://www.suzukiinfo.com/sierra download the guage templates that are calibrated for 31".
Adjust the design if you dont like them then get them printed on a sticker. You will be a fraction underspeed but all good.
A cheap fix.