What is the differential ratio of an IS200?
What is the differential ratio of an IS200?
02-04-2017, 10:54 AM
Hurricane Sounds about right. The sports had the higher ratio
It didnt.
All Manual IS200's have a ration of 3.909, the autos 4.1
The Altezza has one of 4.1 as well auto and manual
![[Image: LexuS-Copy.jpg]](http://i65.photobucket.com/albums/h204/Sparkystav/LexuS-Copy.jpg)
Read my thread here: The Evolution of my Turbo Lexus from NA-Supercharged-Twin Turbo-Massive Single
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Sparkystav
02-04-2017, 10:54 AM #6Hurricane Sounds about right. The sports had the higher ratio
It didnt.
All Manual IS200's have a ration of 3.909, the autos 4.1
The Altezza has one of 4.1 as well auto and manual
Read my thread here: The Evolution of my Turbo Lexus from NA-Supercharged-Twin Turbo-Massive Single
Please leave your comments.
OutlawJapClub Admin Team
02-04-2017, 10:58 AM
Sparkystav It didnt.
All Manual IS200's have a ration of 3.909, the autos 4.1
The Altezza has one of 4.1 as well auto and manual
Thanks Stav for the info. So I suppose using an Altezza crown on an IS200 the acceleration will be better and the loss of top speed will be small.
LEXUS IS200 - The most fun car to go sideways
Sparkystav It didnt.
All Manual IS200's have a ration of 3.909, the autos 4.1
The Altezza has one of 4.1 as well auto and manual
Thanks Stav for the info. So I suppose using an Altezza crown on an IS200 the acceleration will be better and the loss of top speed will be small.
LEXUS IS200 - The most fun car to go sideways
02-04-2017, 10:59 AM
You can get the TRD diff to change the final drive ratio, which will speed up your 0-60. But it will lower your top speed, and make more noise and use more petrol (because you'll be doing more revs than before for the same speed).
![[Image: Sig-enginebay.jpg]](http://i5.photobucket.com/albums/y179/SteveHammatt/Sig-enginebay.jpg)
IS200 Turbo project now just about complete ! See my thread here and leave your comments.
Now running standalone Syvecs ECU and no stock ECU !
steviewevie
02-04-2017, 10:59 AM #8Yeah if the Sport didn't have the same diff ratio as the S/SE, then it would have a lower/higher top speed and acceleration. Which it doesn't.
You can get the TRD diff to change the final drive ratio, which will speed up your 0-60. But it will lower your top speed, and make more noise and use more petrol (because you'll be doing more revs than before for the same speed).
IS200 Turbo project now just about complete ! See my thread here and leave your comments.
Now running standalone Syvecs ECU and no stock ECU !
02-04-2017, 11:02 AM
steviewevie Yeah if the Sport didn't have the same diff ratio as the S/SE, then it would have a lower/higher top speed and acceleration. Which it doesn't.
You can get the TRD diff to change the final drive ratio, which will speed up your 0-60. But it will lower your top speed, and make more noise and use more petrol (because you'll be doing more revs than before for the same speed).
Yes you are correct mate. Do you know by chance what is the loss of top speed? 10miles or more? Also what is the difference in revs at the same speed? 500rpm or more?
LEXUS IS200 - The most fun car to go sideways
steviewevie Yeah if the Sport didn't have the same diff ratio as the S/SE, then it would have a lower/higher top speed and acceleration. Which it doesn't.
You can get the TRD diff to change the final drive ratio, which will speed up your 0-60. But it will lower your top speed, and make more noise and use more petrol (because you'll be doing more revs than before for the same speed).
Yes you are correct mate. Do you know by chance what is the loss of top speed? 10miles or more? Also what is the difference in revs at the same speed? 500rpm or more?
LEXUS IS200 - The most fun car to go sideways
02-04-2017, 12:52 PM
dimis Yes you are correct mate. Do you know by chance what is the loss of top speed? 10miles or more? Also what is the difference in revs at the same speed? 500rpm or more?
It depends which ratio you go for in the diff, I think there have been a few different ones on Altezzas, it's more complicated than the IS200. If you were going from 3.909 to 4.1 then that's around 4.9% difference, so I think you'd lose 4.9% off your top speed, which is about 6.5mph I think. And your revs would be 4.9% higher for the same speed. I think that's how it would work.
IS200 Turbo project now just about complete ! See my thread here and leave your comments.
Now running standalone Syvecs ECU and no stock ECU !
steviewevie
02-04-2017, 12:52 PM #10dimis Yes you are correct mate. Do you know by chance what is the loss of top speed? 10miles or more? Also what is the difference in revs at the same speed? 500rpm or more?
It depends which ratio you go for in the diff, I think there have been a few different ones on Altezzas, it's more complicated than the IS200. If you were going from 3.909 to 4.1 then that's around 4.9% difference, so I think you'd lose 4.9% off your top speed, which is about 6.5mph I think. And your revs would be 4.9% higher for the same speed. I think that's how it would work.
IS200 Turbo project now just about complete ! See my thread here and leave your comments.
Now running standalone Syvecs ECU and no stock ECU !
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