4.375 Diff Ratio In Gtr

[rev210]

Hi Pete,

Hows the accelleration improvement, should go a little better now.

[pnblight]

Hi Pete,

Hows the accelleration improvement, should go a little better now.

<{POST_SNAPBACK}>

I should be able to tell you very soon as drop all remaining AWD components back in last night (have been running the gtr in, in 2wd) done over 1300km now on minium boost (feeling rather proud not to have give in to temption hehe). I just got to finish fitting new oil cooler and complete oil and filter change. So hope like friday arvo i should be able to see the full impact of the different ratios.

pete

hows your travelling along (whats the kms up to now lol)

[Duncan]

the shorter ratios will feel brilliant! best change I've made

[NXTIME]

Sign me up for a change

[funkymonkey]

you sacrifice top end speed with the GTS4 gear ratio swap though don't you?

[pnblight]

you sacrifice top end speed with the GTS4 gear ratio swap though don't you?

<{POST_SNAPBACK}>

dude the old ratio was like 160kms 4000rpm and we are only dropping 6%(8000rpm=320 - 6% 300km) or there abouts how often do people want to do 300km plus, but mine can run out to 9000rpm with full new internals now so it more than off set it (~338kms) and no i dont intent to find out. The fast i have ever run the car was back ages ago once 280km it was still pulling on and i had like a 100rwhp less than i do now but i really dont have any interest to try it again as the world is flying pass pretty damn quick.

pete

[funkymonkey]

hmm... now that you put it that way, I guess the difference between 320km/h and 300km/h is minimal in a street car. With the GTR gearbox, how many RPM were you doing in 4th gear at 100km/h and what is it now with the GTS4 gearbox?

[CruiseLiner]

hey pete 280kmh in a car is just crazy was that on the street or track? ive gone just upto 200 and i dont think i'd go much quicker (except maybe at the drag strip, but not on the road)

cheers

Brad

[AlexCim]

You would think the improvement in acceleration would be somewhere around hte ratio between the change, meaning the acceleration would be somewhere around 4.375/4.11 = 6% faster. This should apply to RPM too

So where it was 4000 at 100, it should now be 6% lower at 3750rpm.... i would think?

[pnblight]

You would think the improvement in acceleration would be somewhere around hte ratio between the change, meaning the acceleration would be somewhere around 4.375/4.11 = 6% faster. This should apply to RPM too

So where it was 4000 at 100, it should now be 6% lower at 3750rpm.... i would think?

<{POST_SNAPBACK}>

wrong way dude

it has to rev high now to make same ground speed, ie i have geared it down.

[Rolls]

yeah other way round, not sure if your 6% thing is right but itll will rev higher so if it was 4k at 100 itll now be 4240rpm

[AlexCim]

Im still new to drivelines... good to learn.

Also, yes, make sense, more rpm at lower speed = faster acceleration.

[KPCresta]

Apologies reviving an ancient thread though I wanted to ask if this is the case when you have an R33 Gtr gearbox with GTS4 (4.375) ratios in the front and rear diffs.

I purchased a 21 spline gts-4 gearbox speedo pinion and my mechanic friend had a very brief look at it and is not convinced if it is the correct part or not.

Is the R32 GTR gearbox speedo drive different to the one in the R33 GTR gearbox?

Alternatively is there any reliable electronic devices out there that can correct my speedo instead?

Cheers

Gavin

[KiwiRS4T]

I think R32 has a cable drive. You can correct the electronic signal with the right gear or if you can still get them a Jaycar Speedo corrector.