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R32 Gtr Diff Gears

luke gtr

By luke gtr,
in Drivetrain and transmission

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luke gtr Grand Master

luke gtr

Posted
Posted

hi everyone, im looking for some info on taller ratio gtr diff gearing.

ive heard r34 gtr can be used, is there anything else out there?

im sure i read a while ago the sss r32 gtr was using aftermarket gears.

any help would be greatly appreciated, thanks, luke.

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luke gtr Grand Master

luke gtr

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It depends how tall you are wanting to go and why??

The R34 GTR has a 3.55:1.

I have a set of 3.9**:1's here but I dont know what they are out of.

im probably looking at around the mid 3's, so r34 gears would be good. i want taller gears to drop the rpm of freeway travel, and try and get better economy :laugh:

not overly bothered by the fact itll have slower pick up, hopefully some mods will fix that :thumbsup:

so, anyone have r34 gtr front and rear gears for sale???

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Beer Baron Grand Master

Beer Baron

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Posted

honestly if you want better economy by a different car. GTRs are performance cars. they will always be hungry and should be. putting 3.5s in there will just dull the performance and give you an astronomical theoretical top speed of 350+ that you will never get too. most people go the other way and do 4.4:1 for even better acceleration and sacrifice top speed down to about 260-270 or so which is plenty. :P

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bnr#@ Mentor

bnr#@

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dont know, but 4.11's are 3100 at 110km, so im guessing around 3300-3500ish????

eng rpm x gear ratio x diff ratio x rolling diameter isnt it?

I realy doubt that... a stock geared GTR is 2600rpm for 100km, doubt it takes another 500rpm to get the extra 10ks... not brave enough to try now though as had a few... lol

Me thinks yours isnt exactly stock in that department...

Edited by bnr#@
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Beer Baron Grand Master

Beer Baron

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What revs would 4.4:1 give you at 100Ks in a 32 GTR? Interested in doing the swap for those tighter tracks...

can't remember exactly, but it does buzz along a bit. lol. I am about to finish the new set-up which is OSG close ratio box, with the 4.4:1 diff gears, built N1 Nur motor, and tiny HKS GT-SS turbos. it should be pretty radical on corner exit now! and will have less top speed, but now have a chance of actually getting there.

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luke gtr Grand Master

luke gtr

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I realy doubt that... a stock geared GTR is 2600rpm for 100km, doubt it takes another 500rpm to get the extra 10ks... not brave enough to try now though as had a few... lol

Me thinks yours isnt exactly stock in that department...

i doubt mine is modified(apart from 235/45r17's), sits at around 3000@100km, then around 3200@110km

ill have to see if i can get someone to record it with my phone.

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SLAPS Rising Star

SLAPS

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Posted (edited)

I agree with Beer Baron.

I've tried multiple diff ratio's in the RWD with up over 300rwkw and even 3.9's kill the feel of the car. It transforms the car from a fast reving FUN sports car in to a dull and LAGGY car.

The longer ratio's make the car feel so so much laggier its not funny. Mods won't make up for the lack of FUN factor but it will push the speeds where the car may feel like its starting to really move to higher road speed. Not so good for those demerit points.

What really sucked about the longer ratio IMO was corner exit. It felt as if the car went from having a gear for every corner to having gears that were either too high or too low, that is unless I was willing to do stupid speeds on the street which is just silly.

The R34 GTR 6speed. Does that drop the highway RPM at 100km/h in top gear? Maybe a gearbox + diff swap is the answer?

Or... Another car.. The tuned LS1 auto purs along at a little over 1500rpm at 100km/h with 7.5-8.5l/100 on the calibrated trip computer. :P

Edited by TheRogue
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  • 1 month later...
luke gtr Grand Master

luke gtr

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can anyone answer me if the R32 gtr diff is a 1.5 way or 1 way

and will it bolt straight into a r32 gtst??

pretty sure gtr/gtst diff internals are different. outside may be the same though...

standard diffs are generally classed as 1 way.

hope this helps.

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some_cs_student Veteran

some_cs_student

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i doubt mine is modified(apart from 235/45r17's), sits at around 3000@100km, then around 3200@110km

ill have to see if i can get someone to record it with my phone.

I remember getting around 3K (looked like 2950RPM or similar) in 5th gear @ 110km/h on 235/45/17, R33 :)

Speedo is slightly off by maybe 4km/h at this speed...

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heller44 Mentor

heller44

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From here. (have to give credit)

http://www.skylinesaustralia.com/forums/Ge...or-t244080.html

Use this.

http://racingdownloads.com/racing_software-22.html

And this.

http://www.jbskyline.net/R32/GTR/Specs/

From memory I thought I was knocking on 3100 @ 110. This is with a 26 and gtr box, with 4.375:1 gears (standard gts4 crown and pinion). Doesn't sound or feel nasty, just like driving a smaller 4 cyl car.

Can't take my car for a drive as it has almost all the front end out atm, new brakes and front driveshafts getting reconditioned.

Edited by heller44
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  • 4 months later...
manage13 Proficient

manage13

Posted
Posted
can't remember exactly, but it does buzz along a bit. lol. I am about to finish the new set-up which is OSG close ratio box, with the 4.4:1 diff gears, built N1 Nur motor, and tiny HKS GT-SS turbos. it should be pretty radical on corner exit now! and will have less top speed, but now have a chance of actually getting there.

Such a noobie question but where can I get 4.4:1 diff gears from?? As in purchase.

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BeEnAr Experienced

BeEnAr

Posted
Posted
I remember getting around 3K (looked like 2950RPM or similar) in 5th gear @ 110km/h on 235/45/17, R33 ;)

Speedo is slightly off by maybe 4km/h at this speed...

I get 3K @ 110km/h on the sat nav, 2900 @ 100km/h on 235/45/17 R32 GTR VSpec II.

Not sure if I have stock internals in GB or Diff though

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