something i just thought of

jammer84_03

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Nov 30, 2003

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Dec 21, 2005

#1

• Dec 21, 2005

• #1

when i upgrade from the stock turbines to the 5lug 17" rims, its going to throw off my speedo i believe. i've searched but no one asked this question. i have plenty of tickets on my record and the last thing i need is a messed up speedo. any one got a suggestion on what would have to be re-configured. i got the right gear for the 3:73's i have in the rear already.

 

B

blackcloud50

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Mar 30, 2005

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Dec 21, 2005

#2

• Dec 21, 2005

• #2

what size tire do u have on the 17s? As long as the overall diameter hasn't changed your speedometer will read correctly

 

jammer84_03

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#3

• Dec 21, 2005

• #3

im...i believe i got 275/40's on the rear....might be 45's...i'd have to check when i get home from work. but im quite positive i have the 40's

 

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blackcloud50

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#4

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• #4

jammer84_03 said:

im...i believe i got 275/40's on the rear....might be 45's...i'd have to check when i get home from work. but im quite positive i have the 40's

Click to expand...

The speedometer will be unaffected from your swap from the 15s.

275/40 would be correct

 

jammer84_03

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#5

• Dec 21, 2005

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ok....i got to many points on my dl right now and i dont need to be cruising around 5mph over by mistake....thx once again black

 

Paul Perreca

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#6

• Dec 21, 2005

• #6

yo, it's not gonna like throw it off 20 miles per hour, you'll know how fast your goin, i haev 3.55's w/ 17's and my speedo is way off, i don't see how you can't just flow w/ traffic

 

jammer84_03

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#7

• Dec 21, 2005

• #7

the stampeed usually follows me...lol. plus i take alot of backroads and drive without other cars around. just a re-assurance to have when driving. plus i like everything to still be functional, especially when someone like my dad or gf drive it, that way i dont have to explain how to drive my car....saves alot of hassle.

 

jammer84_03

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#8

• Dec 21, 2005

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plus i pride myself in a job done right...ask alot of questions first, know the possibilities of what could happen, and execute. dont want something i just spent a ton of money on to not work properly

 

D

Deleted member 87397

Dec 21, 2005

#9

• Dec 21, 2005

• #9

go here and do the calculations and you'll find everything you need to know.


http://www.sccoa.com/faq/speedgr.html

this is a site that deals with autos, so if the right drive gear teeth number isn't one of the choices listed it won't work.

 

T

TheUser

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Jul 25, 2003

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Dec 21, 2005

#10

• Dec 21, 2005

• #10

blackcloud50 said:

The speedometer will be unaffected from your swap from the 15s.

275/40 would be correct

Click to expand...

Yep!

I believe the stock tire size is 225/60/15, so that's a diameter of 25.6". If yours are 275/40/17, they're also 25.6". Provided the stock size is what I mentioned, your speedo should be accurate as long as your rear gear/tranny gear match up.