JDM RX-7 GTR LSD Swap?
 

Hey I am planning on importing a jdm fc. The only reason why I am favoring a GTX is because it has a stock lsd, but if I get a GTR... I know that it does not come with an LSD, but if I were to purchase one, what would be the best thing to do if I want an LSD in there; swap or aftermarket? Does anyone know which LSD (the n. american TII might? I don't know much about this) will fit in the GTR?

thanks!

*edit* I'm talking about an S5 btw

bump

Who told you the GTX/GTR has no LSD?

I thought all turbo II's had LSD.
All of them in the US do.

The only NA ones in the US to have LSD would be the GXL/88GTU/GTU's

Also expect to pay over 10k to get it LEGALLY brought into the US and street legal.

I posted a thread here a few weeks back. The GTX has an LSD. The GTR is the base model in Japan that has no LSD.

And I can get one for about 6 - 7,500 CAN through importconcern.ca.

The GTR is the series 4 TurboII, the GTX is the series 5 TurboII.

all FC's in japan are turbo, therefore - all FC's in japan have LSD's...

Exactly.

I think you all are just assuming because of the US specs.

http://www.j-garage.com/Mazda/rx7/fc3s/spec89.htm

No way.

*edit* I don't want to sound cold, but I guess I asked the wrong forum... Thanks for the help though.

Than to answer your question, a series 5 LSD from north america will fit into your vehicle with no fuss.

Did you read my original message? I wasn't asking if this or that model had an LSD, I wanted to know my options!

Re: JDM RX-7 GTR LSD Swap?
 

*edit* ok you edited your message. thanks for reading my original post Tony. And thanks for the reply.

I read it, and answered it. Whats the problem?

LOL I read your post before you edited it... I was replying to that one.. you know what I'm talking about.

If you read it, BEFORE I so called edited it, than it would say it was edited. And I dont see that.... :p:

Whatever dude, you know you edited it. You wrote something stupid and I replied to it, then you realized your mistake. Leave it at that, don't try and hide it. Funny man.

:rofl:

Im just saying, your proof isnt very solid.

I know, I've edited messages many times, look at my post:
"No way.

*edit* I don't want to sound cold, but I guess I asked the wrong forum... Thanks for the help though."

there is no EDIT at the bottom I don't know why - but sometimes it doesn't show up.

I don't care if I can't prove it, you know it inside that you edited it. I'm just saying.

Now this is retarded, didn't have to be like this but you pushed me to speak up. Im going to disregard any more messages that aren't on topic in this thread. Getting side tracked.

Your question was answered!

Try editing your post now, and see if it doeset say anything at the bottom.

The only way a post can be edited without someone knowing, is if it hasnt been seen.

Edit:

Hey look, someone saw this, and what is this crap on the bottom of my post?

to answer your question... i think your best bet would be to get the "GTR" and to your suprise it WILL have an LSD on there...

Whatever Tony. At least you know that I read it. Again I don't care what others think, I know you have a weak soul and can't stand to what you wrote or edited. You lost something called face!

deltron did you click on the link I posted?

yes and its put together by someone, who knows WHO? not mazda thats for sure...

anyone can just make a table and type info in it... you going to believe it? not me...

Hm you can see I have a weak soul. Could you also tell me my horoscope? Or maybe you know when Jesus will return. Share the wealth of knowledge!

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.

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

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

Like your contacts? :rlaugh:

They know the specs, but I never asked them.

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

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.

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.

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.

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.

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)

Gentlemen,

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

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

:)

Yes.

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

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...

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. :(

Lets see that one wheel peel!

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

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.

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.

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

Damn it hurts getting :owned: by the master.

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! :D



-Ted

Ah, it was all in ignorant fun!

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