Kcr R31 Original Engine 3.0e

[bkc]

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 .

[bkc]

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 .

[bkc]

Is there anybody can answer fully my question ?

Thanks .

[Simon-S14]

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.

[bkc]

Thanks. I am looking for direct fittings on the R31(RB25DET and transmission from ECR33), so please let me know which will be the suitable with good ratio and better response and enough power for engine.

[bkc]

Thank you for Wonderful reply ..

but do I CAN direct fit it original rear gearbox (differential) from ECR33 GTS ON THE R31 without any modify ???

thank you advance .

[R31Nismoid]

No you cant

you need to modify the crossmember

[joeyjoejoejuniorshabadoo]

mt head hurts...

[bkc]

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 .

[floody]

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 July 21, 2008 by floody

[bkc]

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 .

[Simon-S14]

do a search for the differences between neo and r33 version

[bkc]

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

Thanks .

[Simon-S14]

I hope you learn English in a hurry...

Edited July 22, 2008 by Simon-R32

[bkc]

I mean , and I need a resolution to the problem Fund rear Gearbox ?! differential ..

( better response ,, top speed ,, power full)

Thank you ...

[bkc]

Thank you ..

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

PLZ : I HOPE let me know for that !

Thank you again .

Edited July 23, 2008 by bkc

[bkc]

hi.

PLZ : anyone , he have the pictures of a for diff !!?

Thank you advance ...

[bkc]

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 ??

Thank you ....

Edited July 26, 2008 by bkc

[bkc]

anyone you have resolution !!!???

what can I choice better diff for R31 direct fit it !! for strong response and top speed 250 KM/H WITH boost (17psi ??!!

Thank you advance ...

[DjeMz]

dude which country are u from