Correcting Computer To Recognize New Tire Size?

[MalikDon]

Hello,

Well, I did attempt a search on this but turned up nothing.

I have an '06 Toyota Camry base model. I recently dropped some 19" rims on this thing and may I just say it looks mean. Now...when I changed rim size on my Camaro I was able to use a hypertech programmer specific to that vehicle and adjust the settings in the computer so that it recognizes the change. This resulted in correct readings on the speedo, etc.

The question is, what can I do about my Camry. Do I have to take it to the dealership or some performance shop? Or does something exist to correct the computer?


Regards,

Don

[CamrySExxx]

what size tires did you get?

[MalikDon]

I have 225/40 ZR-19's all around. They said the radius would only be about 0.5" larger than stock (15").

[lammydi]

Originally Posted by MalikDon

I have 225/40 ZR-19's all around. They said the radius would only be about 0.5" larger than stock (15").

I wouldn't worry about it.
205-65-15= 25.49 in. overall diameter (stock LE)
225-40-19=26.09 in.
The difference is 2.3% increase over stock size. It's not worth it to update your car's ECU.

[Punks_Not_Dead5]

is your car lowered? any rubbing? reason i ask is i have 19's on the way

[LXS-mode]

Originally Posted by Punks_Not_Dead5

is your car lowered? any rubbing? reason i ask is i have 19's on the way

19 inch LEXUS IS-F WHEELS! i kid!

to OP - dont change it.. its not really necessary.. diff of maybe 3mph

[new echo owner]

From what I was told, the IS-F wheels are about $7,000 a set!

N.E.O.

[Punks_Not_Dead5]

Originally Posted by janfrancis

19 inch LEXUS IS-F WHEELS! i kid!

to OP - dont change it.. its not really necessary.. diff of maybe 3mph

i do like the IS-F wheels......but NOT on a Camry..and no mine aren't 19 Lexus rims lol

[LXS-mode]

Originally Posted by new echo owner

From what I was told, the IS-F wheels are about $7,000 a set!

N.E.O.

from the dealer.. but theres a site selling them for 1200 a pop.

[danorthface]

Originally Posted by lammydi

I wouldn't worry about it.
205-65-15= 25.49 in. overall diameter (stock LE)
225-40-19=26.09 in.
The difference is 2.3% increase over stock size. It's not worth it to update your car's ECU.

2.3% * pie = 7.22% error on your speedometer

[danorthface]

Originally Posted by janfrancis

19 inch LEXUS IS-F WHEELS! i kid!

to OP - dont change it.. its not really necessary.. diff of maybe 3mph

at 70 mph, you're actually over 5 mph off. The error changes with speed

[CamrySExxx]

^^

"speedometer reading with non-stock tire is 2.3% too slow. When your speedo reads 60 mph, you are actually travelling 61.4mph"

According to the specs lammy used, since hes changed wheels more than i change my underwear (jk!!) I'll trust he's right!

[lammydi]

Originally Posted by CamrySExxx

^^

"speedometer reading with non-stock tire is 2.3% too slow. When your speedo reads 60 mph, you are actually travelling 61.4mph"

According to the specs lammy used, since hes changed wheels more than i change my underwear (jk!!) I'll trust he's right!

Off topic: You better change a new underwear...because I just got a new set of rims.

[CamrySExxx]

^ no way! thought you were going to keep your hhr's! when are we getting new pics?

[lammydi]

Originally Posted by CamrySExxx

^ no way! thought you were going to keep your hhr's! when are we getting new pics?

And you believe me that I'm done with rims...hahaha.
I will post it Monday. The new set is in my garage waiting to be mounted onto the current set of tires on the HR5. They are brand new at less than 1k miles driven. The HR5 already has a new owner waiting.....
I'm too busy in the weekend with kids soccer, karate, Sunday Church activities...and so on.