Jump to content
SAU Community

Recommended Posts

Hi all

anyone can you help me ?

I have Nissan skyline gtsx 89 (kcr) r31 coupe .

I fit it engine RB25DET AND GEARBOX (TRANSMISSION)R33 ECR33 GTS TYPE M !

I NEED know what type rear gearbox ( differential ) suitable for the engine and transmission direct fit on the kcr R31?

because original (OEM) differential not enough to the rb25det with

transmission !! ( high RPM LOW SPEED AND NOT GOOD RESPONSE ON THE LOW RPM !!!

FOR the powerful and top speed and good response ?

NOTE: modify dump pipe ,,exhaust system complete ,, air intake filter,, big intercooler only !! ,, stock turbo stock engine . etc :):(

Thanks all .

Link to comment
https://www.sau.com.au/forums/topic/228472-kcr-r31-original-engine-30e/
Share on other sites

Hi .

PLZ : I need from your help to me and I like for advise to me !

my ask to you is : I have skyline gtsx 89( coupe ) cases kcr / R 31 ORIGINAL ENGINE RB 30e carburetor !! I change engine and FIT it RB25DET AND GEARBOX( TRANSMISSION) FROM GTS ECR /R33 !!

( WHAT IS the type the suitable differential fit it ) ?? for that engine & gear box ? for the racing street and bitter bower ,, top speed and response ( only modify : dump pipe and complete exhaust system 3 inch ,,air filter intake and change big intercooler kit( i mean changed OEM small intercooler use it !! stock engine and turbo etc . ( PLZ : I need know suitable differential for the engine and gearbox direct fit it ON THE gtsx 89 R31!! ( low RPM ,,TOP SPEED and high speed !!

(( because original differential not good and not enough ? (differential number 10,000 ,39 Rack!

example : 3000 rpm and speed meeter 140 KM !!

Thank you for your time .

Best regards .

Keep in mind i have no idea what the f**k you are saying so i will try my best.

you will need an R200 Long Nose Diff, the R31 coupe comes with them stock im pretty sure. this diff has the same sized crownwheel (internals) as the R32/33/34 diff's so yes it will be strong enough.

as for ratio, get a 4.1, this is what the R33 has stock and since you are fitting the 33 motor and box, you'll essentially have the same drivetrain as a 33.

MY skyline gtsx kcr R31 RB30e middle east state of Kuwait , I need strong

street racing ,response gear one -2-3-4 and not stop on the gear 5 !! to the

top speed ( I mean on the gear 5 does not begin to drop !!

Thank you again .

Sounds like you have a 3.9:1 ratio long nose R200 differential. I would retain this differential and fit a suitable limited slip centre. It should compliment the RB25DET and gearbox quite well.

The original differential casing in the R31 is a load bearing item; the R33 casings are not. I would advise it is not a good idea to try and use the R33 differential housing.

Edited by floody

Thank you for your reply ..

(( I hope that you find a solution to this problem!! diff ...

Well , what difference between RB25DET,250HP r33 and RB25DET Neo ER34 280hp?? why? ( injectors , camshaft,Turbo .etc

PLZ : I HOPE let me know for that !

Thank you very much again .

Differential: - All are R200

84-86 Z31 Turbo: 3.54:1 - Open

09/86-04/87 Z31 Turbo: 3.7:1 - Open

04/87-89 Z31 Turbo: 3.7:1 - Clutch LSD

PLZ : any type suitable of diff I can choice from top write ?? :devil:

Thank you ....

Edited by bkc

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Oh bugger ! Your right ! Good old hydrogen sulfide. Takes me back to the good old school days ! 
    • I've owned a few scooters over the years, a Vespa PX oil burner was my first scooter, followed by a few others, including a little 50cc BeeWee that I used as a barracks bike, and I've had a blast on all of them, they really are the cheapest for of city/suburb transport around The only issue with scooters in Australia is lots of people look down on them due to their size,  maybe they need a big bike to make up for something else where they are lacking, unlike Europe and Asia where every man an their dog owns one, and now that filtering is legal in NSW, local traffic is never a issue Not to say I haven't owned my share of big cc bikes over the years, but they were for more blasting through the hills or Hwy riding where it needed to sit on Hwy speeds Safety wise, I ride like everyone is always trying to kill me, everyone is running a red, or running stop/give way signs, or generally asleep at the wheel, which most people are duringtheir commute, I also ride really safe, and give myself, and everyone else enough room in case I need to pull some hasty evasive actions, I've done a few rider training days over the years, which has come in handy on more than a few occasions  As for mods, there's nothing really, and yes your right about aftermarket exhaust, all you get is loud and obnoxious noises from them, like every 250-300 cc you hear with a aftermarket muffler, in saying this I did put a rear muffler from a 125 Aprilla on one of my old 125 scooters, it was horrendous and no amount of full face helmet and ear plugs would dampen that noise As for coming from the Harley, and what a overpriced POS that was, I no longer do big rides as my poor old busted joints ache after about 1/2 an hour of riding, long cruises are so much more enjoyable now in a car, so a big bike would be pointless   
    • Oh wow, it's easy to forget how cheap these can be. Probably the cheapest way to travel. Though people in cars here tend to be morons and I would not feel very safe. Were scooters ever big in Australia? It used to be the thing growing up in Europe ~20 years ago. 50/70/125ccm Peugeot or Yamaha and some others. Utterly obnoxious Polini race exhausts. Kick stands that slant as much as possible. So loud. So much noise for really not moving very fast at all. But it felt cool at the time. Not sure where I'm going with this, but there is an aftermarket for mopeds! Though I'd have pictured you more for a Goldwing kind of guy after growing out of the Harley.
    • You need to know I am sorry for this.  
    • As the MX5 isn't apparently "manly" enough, and I need something for runs to the local shops, and also take to my part time job at the salon, basically I can keep the MX5 away from car parks and stuff......like "flying lockers", I was wondering what I could buy to fix this issue LOL, I pick up a new Yamaha 125 Delight this arvo from Trooper Lu, basically a R1 that you can fit a slab of beer on between your feet, also, it was $29400 cheaper than a R1, so actually it's 2 x better than a R1    
×
×
  • Create New...