If I manage to get hold of this diff, what custom bits do I need to fabricate ?
Anyone knows what the final gear ratio is for a R33 diff ?

 

stock gear ratio for the gtst is 4.11
what ever elaug got fabricated you will need the same

 

Ok guys, I am a big 240SX guy, here is the info you need on the available differentials.

They will hold 500+ whp, they are cheap, there are tons of LSD options (KAAZ, NISMO, Quaife)

There are a few versions of the 240sx diff (R200)
The 89-98 240sx all had a version of the R200.
Some had a viscous LSD these can be identified by a few different means.

The easiest is to turn one of the output shafts, if the other output shaft turns the same direction it is vlsd, if it turns the opposite direction it is open.

If you want more confirmation open the housing up and look at the unit, the open diffs have a open sided case and you can see the spider gears easily. The VLSD only has a "window" on either side and the internals of the unit are harder to see.

There are 2 different housings, the non-ABS and the ABS. The ABS housing is about 3/4" longer due to an ABS sensor on the front of the housing (the one pictured in the previous line is a non ABS).

Only the non turbo 300ZX diffs are compatible, the 300ZX Turbo used a R230 diff which is physically larger.
The 240SX/300ZX has a 4.083 final drive.
The Infiniti J30 also used a R200 and is compatible but has a 3.92 final drive.

Good luck!
Blake
Denver, CO

 

Nice find Fred
how much are they charging for the 600whp axle mate?

All we need now is a stronger diff housing + lsd from honda or an aftermarket source and we should have a bullet proof drive train

 

I spoke with them a few days ago. They have just come out with a level 6 axle set for the S2000 which they say is good for more than 800HP. It's pricy though - $1695. I'll probably end up with them, but it will be a while. Have to recoup from my turbo build. Hope to try starting the engine for the first time sometime this week.

 

some more info related to the R200
http://zhome.com/ZCMnL/tech/R200.htm

 

Is it me or is your honda badge on your car in your signature really big??

 

Yes it is a bigger size then the normal S2000 honda badge.

 

fperra, have you considered the comptech reinforced diff housing/bolts combined with the cyro-treatment?

 

The weakness and upgrades that are being pursued in the drivetrain, are these necessary for drag/launch applications only? Are axle, differential and driveshaft issues with these 400+whp outputs being experienced throughout the RPM range?