supra1

Not sure what you are referring to when you say sharpen the gain. Personally the 3.23 rear gear should give a lot better fuel economy but with the stock twins it still might feel sluggish. If you can't get your hands on a gs300 4.27 gearing, the sc400 has a 3.91 gearing that works very well with the aristo 4 speed trans. The 4.27 gearing makes the car shift way too soon and the car will get terrible fuel economy.

japspec

iTrader: (4)

Sharpen how quick the twins spool up= sharpen gain on electronic boost controller

99 GS3

iTrader: (14)

The GS300 has 3.91x/3.92 rear gear in it, not a 4.27..

The 3.9x does fine with the aristo trans. It's a marginal difference from the stock aristo 3.76..

supra1

My bad dude, just did a quick search and through it up. Thanks for posting the correct ratio.

99 GS3

iTrader: (14)

SupraForums has a wealth of information but is not the definitive resource for the GS300. Keep in mind a ton of all the various forums dedicated to the Supra have large amounts of information and members that have been compiled from European countries which mingles specs within the searchable information available.

The 3.615 gear set you speak of is what came in the UK/GCC/EUR GS300's, the USDM, Australian, and JDM S300 versions came with the 3.917.

Once you buy a GS300, take the rear diff cover off and count the teeth to see for yourself what many other members and myself have seen in person when taking these pumpkins out, instead of speculating off information taken from another forum.

NORTH AMERICAN
41201 FINAL GEAR KIT, DIFFERENTIAL, REAR
41201‑80029 JZS160, *FGR=47:12=3.917 (08/1997-12/2004)

EUROPEAN
41201 FINAL GEAR KIT, DIFFERENTIAL, REAR
41201‑49125 JZS160..EUR, GCC, *FGR=47:13=3.615 (08/1997 - 12/2004)

supra1

I would rather just put a Supra auto rear diff in if I am doing a 2jzgte vvti swap. The supra auto and aristo all have the 3.76 rear gearing which is optimal for stock twin turbos. Thanks for posting the correct info though.

Do you have the 3.91 rear gearing in your swap? if so, how is the fuel economy? Does it shift fast?

99 GS3

iTrader: (14)

Of course the Supra Auto A02B LSD 3.769 is an ideal setup to mate with the Aristo 4spd. Although 3.76 vs 3.91 is marginal, it's barley noticeable and wouldn't be worth hassle to swap except the fact your gaining lsd...



3.266, it destroys a tank of gas in no time, and it shifts as fast as I can push the pedal and throw the lever.

JeffTsai

iTrader: (1)

Lol @ people worrying about fuel economy when planning on doing a swap and wanting to go pedal to the metal

88supramki

It's because they hear all of the Supraforums guys talk about how the big Turbo guys get 30mpg in vacuum on the highway and then step on it to get in boost.

VIP161

iTrader: (3)

Thank you all for the useful information. Im picking up a complete Aristo swap when my returns arrive. I realize I will have to spend a little extra on the supporting mods like having a custom single piece drive shaft made unless an SC300 one will work for my W58. Also, I might have to run it on the GS430 cluster and differential until I can find some legit replacements. I'd rather replace the diffy with a Kazz LSD or a TT LSD. The cluster part I can deal with until I either get the Dakota calibrator or a replacement piece. About the gas mileage, Im not too worried about it. The 3UZ probably burns more than the 2JZ single turbo.

VIP161

iTrader: (3)

Can someone hook me up?

If I run a W58 (the version with the internal shifter) with the GS430 Auto diff on a 2JZGTE, will I be able to use a complete drive shaft off of a 5speed SC300?

99 GS3

iTrader: (14)

Will a JZZ shaft fit directly in a in a JZS? Nope, an no matter which manual trans you use (w55, w58, R154, or V16x) you'll either need a custom shaft or have the GS shaft modified.

VIP161

iTrader: (3)

Custom one piece it is! Thanks!

JeffTsai

iTrader: (1)

Don't really see how that is quite possible. The 2JZ-GE/GTE is a dinosaur in terms of fuel economy. A bone stock 2JZ of the newest iteration which is the 2JZ-FSE. It's a direct injected narrow angle intake head designed for maximum fuel economy. The best fuel economy realized on that engine is anywhere from 25-27mpg on a ultra lean burn stratified charge. Those run in the ranges of 20:1 all the way up to a possible 40:1 ratio! Now, you're telling me that the supra guys are getting 30mpg on a older tech port injected 2JZ?

I mean, unless they are seriously driving like grandmas, coasting and employing hypermiling to the max...but even then I don't see how that's really possible to get 30mpg on a 2JZ.

VIP161

iTrader: (3)

Fuel economy is the least of my concern. The reason Im switching from a 3UZ to a 2JZ is for the power potential and reliability. I dont even know how people come up with these MPGs. Its pretty interesting actually. If anyone knows please let me know.