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Location:
Perth, WA
Registered:
December 2004
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Speedo Correction
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Mon, 24 October 2005 15:34
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Hi,
Im going to put some 17" rims on my sisters camry tomorrow, so they can be used while im still looking for a car.
the model of camry she has, ive been told is the DV10 (or something similar), its a 1993 Widebody, 5sfe.
stock, her car came with 14" rims, and i am well aware that 17" rims are not quite in favour with the constabulary.
i also know that because of the greater circumferance of the 17" wheels, that her speedo will be out of whack, in that she will be going faster than the speedo is showing.
is there a program on the net somewhere where i can calculate the difference in the speeds? so i know whenm the speedos showing 50km/h its actually 60 or similar?!?!
they're only going on for shits and giggles, they arent staying there or id get the speedo recalibrated, properly.
Cheers,
Eldar.O.
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Location:
Campbelltown
Registered:
November 2003
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Re: Speedo Correction
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Mon, 24 October 2005 23:25
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Tyre ie 205 times the profile ie .45 times two (both sidewalls) then add the rim size ie 17 x 25.4. And the times by pi to get the circumference (not necessary needed you can work out the difference just by the diameter as pi is a constant in both).
(205 x .45 x 2) + (17x25.4) = 616.3mm 
Alternatively just post the tyre width and profile of both tyres and i'll do the calcs for you.
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Location:
Perth, WA
Registered:
December 2004
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Re: Speedo Correction
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Tue, 25 October 2005 02:13
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rona, i dont need to know the circumferance man, i have learnt how to work out all that stuff already, of course i could jut grab a tape measure and walk into my garage where the rims are now sitting.
what i wanted to know was, how i could calculate the difference in the speedo readings between the two circumferances.
i.e. the difference seems to be about 10-12cm in circumferance, which should translate into a difference of about 10% or so in the speedo difference (i.e. the speedo will show a lower sped than what the cars actual speed is.
It doesnt matter now anyway, ive tried the rims on, the fronts fit perfectly, however, the back rims do not, since the sidewall bulges out a bit and hits the strut... ghey.
ive also found out the model number is the SVX10, and that camrys are 5x114.3 PCD.
Ill upload some pics in a few minutes.
Eldar.O.
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Location:
Perth, WA
Registered:
December 2004
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Re: Speedo Correction
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Tue, 25 October 2005 02:28
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Higher than a Soarer.
Rear Tyre sidewall mashing itself into the strut.
And i wondered why it wouldnt fit???!!!? right is stock.
I know it needs to be lowered, but my sister wont listen, and with the way ive seen some camry drivers drive, it think it should stay this way...
Rims will go on a cressida, when i get round to buying one...
Eldar.O.
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Location:
wollongong NSW
Registered:
August 2003
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Location:
new castle
Registered:
July 2005
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Re: Speedo Correction
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Tue, 25 October 2005 08:00
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once you know how far out your speedo is. how do you fix it?
interested because thinking from going from 14's to 17's aswell
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Location:
Perth, WA
Registered:
December 2004
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Location:
Newcastle
Registered:
July 2003
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Location:
wollongong NSW
Registered:
August 2003
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Re: Speedo Correction
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Tue, 25 October 2005 09:11
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no problems eldar0.
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Location:
Potts Point, Sydney
Registered:
October 2003
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Re: Speedo Correction
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Tue, 25 October 2005 09:22
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i went from 14's to 17's and at around 100km/h my speedo is out around 5k's. So i just sit on 95 or so 
That's a great site, does anyoe know how to fix the the problem DIY?
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Location:
wollongong NSW
Registered:
August 2003
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Re: Speedo Correction
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Tue, 25 October 2005 09:41
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bit slow toof, beat you too it
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Location:
Sunny Coast
Registered:
March 2005
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Re: Speedo Correction
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Tue, 25 October 2005 10:01
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Well umm, I sorta have a real dodgy idea on how to correct ya speedo, prob wouldn't work, i dunno.
But jack up ya driven wheels, start it and bring it to like 50km/h or something and then if ya got the cover off ya dash panel u can pull the lil needle off and put it back on to like 45km/h... but thats like a far out idea, then again i can't think of any other way u could do it.
PS. my tyres would be scrubing against the strut wall too if i hadn't put some 5mm spacers in.
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Location:
Sydney
Registered:
September 2003
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Re: Speedo Correction
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Tue, 25 October 2005 10:35
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you need spacers or get the right offset .
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Location:
Sydney
Registered:
April 2004
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Re: Speedo Correction
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Tue, 25 October 2005 12:51
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| smt_007 wrote on Tue, 25 October 2005 20:35 |
you need spacers or get the right offset .
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exactly.
your problem (in that pic) isnt tyres its incorrect offset. Either get wheel spacers or get rims with less positive offset. DO NOT drive around like that.
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Location:
Perth, WA
Registered:
December 2004
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Re: Speedo Correction
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Tue, 25 October 2005 23:07
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IM NOT driving around like that, hence why i took them OFF the car.
and no, its not the rim at all, its because of the sidewall, the rims clear the strut by 5-7mm, but the result of the extra wide tyres for the rims means that they bulge out and rub.
AND the rims already have a 10mm spacer pcd changer on them.
stock offset on the rims i beleive is +60/70 already
Eldar.O.
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