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Discussion Starter #1
I'm wondering... I plan on steping up the wheel size of my IS3 when I get it but want to use the same aspect ratio tire. This means the total package will be a larger wheel+tire than factory. I would like to retain my odometer and speedo accuracy so is there a shorter gearing kit available for the IS3? Are there any manufacturers that can machine one?

just throwing some ideas out there...

thanks in advance,
-Alt

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Ashraf Shabudin / Ampman Audio Marketing Director, TeamAMP Director
 

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Discussion Starter #2
Oh yeah... this would be for the LSD diff...

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Ashraf Shabudin / Ampman Audio Marketing Director, TeamAMP Director
 

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Discussion Starter #3
Anyone? Someone's gotta know something about this, please...

tia,
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Ashraf Shabudin / Ampman Audio Marketing Director, TeamAMP Director
 

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Yes, there are actually a company in Japan called KAAZ that makes LSD, Transmission components and final gear for many Japanese car including Altezza. The final gear for the Altezza will fit the IS300 and you should expect it to be around $500.

Oh, but I don't think it will solve your odometer problem because the speed sensor is very close to the wheel. Changing your final gear will only improve your accerlation and lower your top speed.

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IS 300

TRD Front & Rear Undercar Brace Kit
TRD Front & Rear Sway bars
TRD Front Grill
Tom's Rear Tower Bar
Tom's Lower Performance Rod Rear
Tom's Suspension Member Reinforcement Rod (Front & Rear)

[This message has been edited by SiR S-Spec (edited February 18, 2001).]
 

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Discussion Starter #5
Ahhhh... so the sensor is on the caliper or near it? Hmmm... that sucks since a taller wheel will run the odo faster than is proper.... and it's illegal to adjust the response of the odo to rotations.... damn.

-Alt
 

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I agree w/Sir-S.

My understanding is that the diff gear will not make the instruments more accurate or compensate for changes in overall wheel diameter.

Changing the diff will only change the performance of the car in terms of acceleration and speed.
 

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Yeah - I wish this were easier to do.

I would like to run the stock wheels with 50 series tires, but I probably won't because of the low speed acceleration and odometer issues.

Wheels gaps are ugly...
Usually they are there so you can fit snow chains on a car, but I don't think I will ever do that to my IS300...
 

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Discussion Starter #8
Originally posted by Altersys:
a taller wheel will run the odo faster than is proper

duuuhhhhh... I meant SLOWER.... all I really would have to do is watch my speed since I'll be going faster than is reported... which is fine with me.

me stupid,
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Ashraf Shabudin / Ampman Audio Marketing Director, TeamAMP Director
 

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Discussion Starter #9
SiR-S, do you have a link for that company you mentioned? I would appreciate it very much!

thanks,
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Ashraf Shabudin / Ampman Audio Marketing Director, TeamAMP Director
 

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Sorry, I don't have the web site. But I heard that the company called "Cusco" also made one for our car.

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IS 300

TRD Front & Rear Undercar Brace Kit
TRD Front & Rear Sway bars
TRD Front Grill
Tom's Rear Tower Bar
Tom's Lower Performance Rod Rear
Tom's Suspension Member Reinforcement Rod (Front & Rear)
 

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i have fitted a 5.1 final gear to my altezza. standard is 4.1

the initial pickup acceleratiuon is much better. other options are available such as 4.3/ 4.7 & 5.1

i am pretty sure 4.7 will do well in a is300
 

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Discussion Starter #13
Thanks guys, you all rock!

-Alt

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Ashraf Shabudin / Ampman Audio Marketing Director, TeamAMP Director
 
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