N8Z

Where did you get your information....? Assumption?

I have asked serveral sources in japan and they all confirm this, as well as a post on this site, and the webpage backs it up. I posted the link for your reference because some of you may not be aware of the JDM models.

N8Z

Yes, Of course I can read your horoscope:
You will lead a superficial life, full of many lies.

TonyTurboII

And none of your Japanese sources could tell you a north american S5 differental would fit into the car?

TonyTurboII

Like your contacts?

N8Z

They know the specs, but I never asked them.

N8Z

Do I even need more evidence to back up your lies? LOL You pulled this out of your *** I know.

TonyTurboII

Hold on, let me go edit that so you can look like a fool. I admit its possible I could be wrong, but ill hold my breath until one of the model brains comes in here to verify it. Ill go with my gut over a chart.

N8Z

Well then state what you say as THOUGHT and not FACT. You were stating as FACT. If you are not sure you say, "I'm guessing...". Simple as that. Simple english schematics.

scathcart

I'll tell you who:
Someone who lists
HORSEPOWER which is a unit measurement of power (746 watts/hp) in PS, which is metric horsepower (735.499 watts/ps).
Horsepower (SAE) does not equal metric horsepower.
To be correct, the listing should read:
Power: 205 PS

Yes, I am that nitpicky. Its the same thing as saying:
Centimeters: 45 inches
Now what the hell does this mean?
Correct would be:
Length: 25 inches

They also list the same fuel tank capacities for both S4 and S5, even though the S4 has a 60L tank.

So while that site is not all that correct, it is correct in that not all FC's in japan came with LSD. They did have base models without LSD, which also came equipped with the hideous 15" painted steel wheels (also available on base model S5's in Canada).

To answer the original question, any Turbo model NA differential will work, including the S4, S5, and the FD torsen unit. The torsen will give the best lock-up rate, but is the weakest (breaks under large power). The S5 viscous unit has a crappy lock-up rate. The S4 unit has a good lock-up, but has a tendency to wear out after 100,00 kms.
In the aftermarket, you have a variety of options. I'm partial to the KAAZ 1.5 way for street driving. Its a pretty nice unit, and decently priced.

Hope this all helps.

scathcart

Am I considered model brain enough for you?

C'mon, it does make sense that they have no LSD versions: base model rims (have you ever seen them?), available with automatics...

You can't compare American rx-7's to anything but American RX-7s. Even the canadian models, both N/A and TII, were significantly different from the american models.

And no, I am not just going by speculation on the no-lsd. I have seen picture proof of it, as well as read about it in Mazda published literature.


And N8Z.... no "I told you so" comments. Lets keep this clean. You cant really act so adamant in your knowledge of RX-7's if you didn't know the answer to your original question.

hIGGI

iTrader: (7)

WRONG

Japan and EURO specs are really close when it comes to FC's and most of European TII's i have had/seen/worked on had no LSD....

http://rx7cz.net/photos/workshop56/

European TII open diff (being fitted with FD Torsen unit)

rx7_ragtop

Gentlemen,

Just a word of caution, as someone "reported" this thread... let's please keep it civil.

(It's not out of hand... YET.)

TonyTurboII

Yes.

N8Z

Thanks scathart. It was in the heat of the moment, was kind of pissed about whatever. It was silly. Anyways, good stuff!

deltr0n`

you learn something new EVERYDAY!, but the first part of my statement was in fact TRUE... i've been told by one of the signal drifters in person... because he was freaked out about my n/a when i had it, that it wasnt turbo, he said (and this is in translation from a friend) that all FC's in japan are turbo...

NZConvertible

All FC's in Japan are turbo'd, but not all FC's in Japan have LSD's. Simple as that. How do I know? Because my car does not have an LSD.

TonyTurboII

Lets see that one wheel peel!

RETed

Come one people, a LOT of you are wrong.

First, GTR and GTX don't denote YEARS - GET THAT OUT OF YOUR HEAD.  This was a myth passed on from a while back that is WRONG.  This is why I use Zenki and Kouki for year denotations.  Series IV and Series V is the other popular denotation.

GT-R and GT-X are TRIM LEVELS.  It's the same with base/GX/GXL - same engine, different trims levels.  REMEMBER THAT.  The only Zenki model in Japan is the GT-Limited, which you probably have no clue what it means.

Read the subject line - it clearly says JDM.  If you don't know JDM facts, please watch what you say.  LSD's are NOT standard on cheaper models (i.e GT-R), so they are NOT standard issue on ALL turbo FC's.  ALL FC's in Japan are turbo, including Cabriolets, in case you didn't know this.

On top of everything else, I think all JDM FC's come with 4.3 rear ends.  NONE of the NA rear diff parts will swap over!  ALL US-spec parts will, but why drop down to a 4.1 if you like your 4.3?

To answer the original posters question, it is recommended to get an aftermarket LSD if you can afford it.  Units from KAAZ, Cusco, Mazdaspeed, or OS Giken will fit either JDM *or* US-spec cars.  Cheaper would be to find a stock FD Torsen LSD, which will fit any turbo diff, JDM *or* US-spec.

The insults look really stupid when you find out you were wrong.  Make sure your comments are correct before posting them, as it'll save all of us a lot of trouble.


-Ted

Icemark

I am not sure is I agree with you on that Ted, as almost no Aus/NZ/Euro spec ones have the 4.3.

I suppose it is possible, that the Jpsecs were different than the Aus/NZ spec, but the only Jspecs that I had heard of (and have confirmed in print) of having the 4.3 was the Infini models.

Rxmfn7

iTrader: (4)

This is what my undestanding was also.. that the Infini model was the only one to get the 4.3.. kind of like the GTUs here.

RETed

I know the Aussie guys who have imported J-Specs all have 4.3's.
I can't even count the number of times I've arguing with them on ratios, or maybe I just got all the owners who had optional 4.3's?

We really need input from the J-Spec owner, but I'm pretty sure they all came in 4.3's.  The US-Specv 4.1 was designed to up the as mileage, since Mazda needed to worry about the stupid CAFE requirements.

Anyone with a HyperREV handy? The ratios are listed in the back of the magazine for all the FC models...


-Ted

TonyTurboII

Damn it hurts getting by the master.

RETed

Dude, I didn't want to rag on you that hard, but you guys wasted like the whole first page for something that was based on misconception!  Hope you had a good Valentines Day!



-Ted

TonyTurboII

Ah, it was all in ignorant fun!

hIGGI

iTrader: (7)

here is page you are probably refering to in HyperRev magazine vol. 23 (RX-7 No.2 - FD and FC)

http://rx7cz.net/pics/hyperrev1.jpg
http://rx7cz.net/pics/hyperrev2.jpg
http://rx7cz.net/pics/hyperrev3.jpg