turbo-111

i keep seeing on ebay the torsion lsd and they say you can put it in a t-II is this true ??

Sideways7

iTrader: (7)

I don't think the ebay one is a direct fit. The only one that is a direct drop in that I know of is the one from the FD.

turbo-111

yeah most of them that i see come the FD, however they also sell OBX lsd's but i dont trust them i havent heard anything good or bad about them. i've always heard the torsion was a good street lsd though.

Sideways7

iTrader: (7)

Yeah, torsen are pretty much the best LSD's for street use. Unless it says it is a drop in replacement for the FD or TII, then it probably wont work.

sniperstevedave

It might work. There are a few RX-7 stores that sell torsen LSDs, so it could fit.

Sideways7

iTrader: (7)

Like I said, ifs its actually made for the rx7 then your good, but most of the ebay crap is universal stuff that needs special fitment.

Carzy Driver

I thought the FD torsen LSDs were a downgrade compared to stock S4 or S5 LSDs???

SexInDaRex

I bought one from ebay and I put it in my T2 diff and it works great the only thing is 1st gear is really short I can actually take off in 2nd if I wanted to. I love it though.

http://cgi.ebay.com/ebaymotors/RX-7-...spagenameZWDVW

I bought from this guy. Mine came with the rings for it as well unlike the auction above.

Sideways7

iTrader: (7)

I've never heard that. The Torsen reacts basically as quickly as the clutch type, and definately quicker than the s5's. It also doesn't need rebuilding like the clutch types, and doesn't wear out like the viscous types. Its the best of both worlds for street use.

Black91n/a

In terms of street use anyway, the FD Torsen will be the best. The S4 clutch type might be better for drift or drag if it's set up very tightly, and it can probably hold more power, but other than that the FD will be better. The S5 viscous isn't worth anything, they'll all be dead by now, the fluid breaks down, rendering it essentially an open diff.

drago86

You know the type of differential has absolutely nothing to do with the gear ratio right? This is why butt dynos lie.


I wouldnt trust the ebay torsens, especially when FD torsen are pretty available.

turbo-111

na,na, na, c they are FD torsion pulled from the 93+ rx7 or at least thats what they say..... does anyone know where to get one that can be proven legit ?

Sideways7

iTrader: (7)

In his post he said that his came with the ring gear also, so it probably actually is a shorter rear end. He said that the revs are higher on the highway, which is a pretty objective observement.
And to the OP, try looking in the FD for sale section for an LSD.

J-Rat

iTrader: (2)

The S4 Diff is considered to be the strongest one out there. It is considered an UPGRADE to an FD diff.

turbo-111

but i'm wanting street hook up... so does the s4 hook up better than the FD'S torsion ??? i mean i dont plan to put more than 275 to the rear wheels on this car

Carzy Driver

Thankyou J-Rat, I knew I had something right!

87 t-66

iTrader: (133)

that is correct, ive sold 2 s4 t2 diff's to FD guys

J-Rat

iTrader: (2)

Then you dont need to worry. 275 isnt much. I put 434 down on a stock S4 diff ON ET STREETS, and it never complained.

Black91n/a

Like I said, the S4 is stronger, and can be set to lock up more aggressively, which is good for those who like going straight only, for drifting, or for huge power when the torsen starts getting fragile (400hp+ I think). For the street with reasonable power levels, for road racing, or for autocross the Torsen is better.

Just because some people consider it an upgrade doesn't make it better across the board.

turbo-111

ahh ha so then there is no need to waste my money

thanks guy's

NZConvertible

It's Torsen, like everyone else has said...

The FD Torsen LSD is an excellent upgrade for most street FC's. The S4 LSD is only as "upgrade" for FD's if they're making a lot of power and regularly do hard launches. Pretty much any S4 LSD will need to be rebuilt now (if it hasn't been already) to perform properly, and that cost's a hell of a lot more than an FD centre.

J-Rat

iTrader: (2)

Eh, my 80k one seems to be holding up just fine...

RETed

I think the stock clutch-type LSD is a piece of ****.
If you're serious and making that much power, drop the bills for an aftermarket unit.
There's no excuse.
You paid several thousand building a rotary to put down 400+ hp.
You're going to cheap out on a diff that costs another grand and go with something OEM?
I don't understand that logic.

BTW, I like the FD Torsens, cause the gear design gives the most linear lock-up.
This is good for newbies learning to grip or drift.
That binary locking of a clutch-type can be unnerving.

Also, I don't think huge power on drift cars is a determinant for a Torsen.
Once the rear wheels are spinning, there is very little backlash load through the drivetrain to stress parts.
If anything, a rear diff cooler might be a good idea or religious fluid service intervals for the rear diff is a good idea.


-Ted

Node

iTrader: (1)

teh s4 t2 clutch type is only considered an upgrade for FD guys when they break them from having ridiculous amounts of power.
like jrat said 400+rwhp and ET streets and his original clutch type works fine.

I think people start to break the torsens w/ FD w/ hard launchs at just around 400+rwhp. Not positive on that number though.
FD guys also bust their diff pumkins in half pretty easy. T2 must be built like a volvo bricklike