Diff choice

Discussion in 'Technical' started by RynoDrifterZ, Sep 29, 2016.

  1. RynoDrifterZ

    RynoDrifterZ Member

    So with some research i got the idea that a NA zed has a R200 diff or some shit and a TT had a R230.... I have the standard TT diff in my drift Z at the moment and want to weld it completely but im not 100% sure if you can weld the standard LSD. Then i read about swaping the standard diff to a NA R200 becuase theres alot more shims or LSD locking parts available. Whats best for me?
    Full time track car, will never see the streets so road legal is no problem
     
  2. MagicMike

    MagicMike Moderator Staff Member

    How much power are you making?

    If not much, swap NA subframe into TT.

    If lots, go the GTR conversion.
     
  3. RynoDrifterZ

    RynoDrifterZ Member

    Aiming for around 400-450 at the wheels
     
  4. MagicMike

    MagicMike Moderator Staff Member

    400-450 what? hp? If hp, IMO an NA swap would be ok and probably the cheapest. You will need a new tailshaft also however.
     
  5. Fists

    Fists Well-Known Member

    Shimming and welding the R230 is the same as doing it to a Viscous R200, I think welding works better with an open centre but can still do it with a viscous and the R230 will be tougher than a welded 200. Shims will be harder to find for the 230 but should be available, and it's not rocket science to make them.

    All that said a Nismo R200 is probably the 'best' solution although Tomei R230 would also be very good, depends a bit on whether shorter gears would suit your usage. You can get 3.69 gears for the 200 pretty easy though so even if you decide you want the longer ratio it'll be easy to swap, hard to find short ratios for the 230.
     
  6. Shane001

    Shane001 Well-Known Member

    Yes you can weld up an R230. Little more complicated than welding a non LSD centre but can be done. You'll need cut open and weld the actual viscous coupling as well as the spider gears.
     
  7. nytcrawlincgull

    nytcrawlincgull New Member

    Since there is already a thread on diffs. Im looking at switching a tt diff into my na for daily driving. I have an aluminium driveshaft for a tt manual and was wondering is it simply just a bolt out bolt in apllication?
     
  8. ProckyZ89

    ProckyZ89 Senior Member

    No. The R230 will require you needing the 6bolt shafts and a different tail shaft.

    You can get 3.69 core for the R200 will just need to be swapped / reassembled.
    Doing that to a NA will add weight and make it even slower :p
     
  9. Fists

    Fists Well-Known Member

    He has the right tail shaft (States it's for a TT, assuming it's for the right wheel base) but yeah when swapping diffs you have to swap the whole rear cradle including knuckles etc.
     
  10. ztoy

    ztoy Autospark Evolution

    just throw a big shim in the r230 and it will essentially lock it. I put a .80mm shim in one of mine years back and it completely locked it. No welding, no diff vibration just heaps of drift angle. :p
     
  11. nytcrawlincgull

    nytcrawlincgull New Member

    Yeah so I have a 90 NA manual and a TT automatic so if I take the rear cradle from the auto and put it in the na te driveshaft will bolt in? (PS Im only on red P's therefore am not working on TT)
     
  12. Fists

    Fists Well-Known Member

    Are the cars two or four seat? You will also need a hicas lock bar/kit if the TT doesn't already have one. What are you trying to achieve? If this is just so that you can use the aluminium shaft you'll be going way backwards, the TT diff is like 10-15kg heavier so the 4kg saving in the shaft is going to be pretty pointless.
     
  13. nytcrawlincgull

    nytcrawlincgull New Member

    Both 4 seaters! and wouldn't the diff out of the TT be better quality?
     
  14. Fists

    Fists Well-Known Member

    It's tougher but nothing fancy, you will never need the extra strength with an NA, just don't do lots of open wheel skids and it'll be fine. TT gearing will make your car significantly slower.
     
  15. tassuperkart

    tassuperkart Its a lie I tell you!

    Yer i gotta ask why would you add significant weight to the ass end and then gear an NA up as a daily???
    You wont save any real fuel if thats what your chasing. I see no benefit whatsoever.
    E
     
  16. Fists

    Fists Well-Known Member

    In my car it actually made ~1L/100km difference. The turbos and tune probably amplify it a bit though.
     
  17. tassuperkart

    tassuperkart Its a lie I tell you!

    Thats fair but thats a TT!
    E
     
  18. Fists

    Fists Well-Known Member

    If it was a car that did a lot of highway time and owned by someone who drives really slowly anyway having bought it just for the looks I wouldn't argue against the TT rear end (could probably find a TT owner who would give you a straight swap and do all the work) but yeah, if you like accelerating it's not a good mod unless you pair it with an SR six speed.
     
  19. QLDZDR

    QLDZDR ID=David


    Yes, that sounds about right :zlove:

    nytcrawlincgull, If you want to reduce overall fuel costs and also improve fuel economy, just use 98 octane fuel and drive smoother.
     

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