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Diff Gears, what size tyres etc
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Author:  suzookyman [ Thu Dec 29, 2011 5:00 am ]
Post subject:  Diff Gears, what size tyres etc
Hi all, I have been given some man Vitara front diff heads and want to put them in my Samurai. My current set up is 1.6 Vit motor, 1ltr transfer case , 2inch sus lift , 2inch body lift, Vit power steer, 31's . Now if I chuck in the crown wheel and pin's out of the vitara what's my top end going to do?, maybe 32's,33's could be on the cards? or should I go back to a Samurai transfer case?
cheers Al
NZ ( home of the Rugby World cup :lol: )
Author:  shep [ Thu Dec 29, 2011 5:05 am ]
Post subject:  Re: Diff Gears, what size tyres etc
suzookyman wrote:
Hi all, I have been given some man Vitara front diff heads and want to put them in my Samurai. My current set up is 1.6 Vit motor, 1ltr transfer case , 2inch sus lift , 2inch body lift, Vit power steer, 31's . Now if I chuck in the crown wheel and pin's out of the vitara what's my top end going to do?, maybe 32's,33's could be on the cards? or should I go back to a Samurai transfer case?
cheers Al
NZ ( home of girly men :wink: )



here ya go

http://www.grimmjeeper.com/metric_gears.html
Author:  zukmeista [ Thu Dec 29, 2011 5:42 pm ]
Post subject:  Re: Diff Gears, what size tyres etc
Hay shep.... :finger:
Author:  zukmeista [ Thu Dec 29, 2011 6:17 pm ]
Post subject:  Re: Diff Gears, what size tyres etc
Did the calculations. Your current RPM at 100km/h is about 3500. Your new RPM with the 1.0l case and 5.12:1 diff gears will be about 4750, or in other words, revving its nuts off :lol: If you put a standard transfer in with 5.12:1 diff gears your RPM will be 4250, so not much better. I think you would be much better to just leave the diffs alone and either buy transfer gears or do a rocklobster because at the moment your high range gearing is about standard so you probably don't want to change it.
When I did the calcs I used the numbers from the factory owners manual and I got the 1.0l transfer ratios from one of 303zukes posts. :helloo:
Author:  Bugsta [ Thu Dec 29, 2011 9:51 pm ]
Post subject:  Re: Diff Gears, what size tyres etc
You'd have AWESOME acceleration in high though!!
Author:  GRPABT1 [ Fri Dec 30, 2011 12:23 am ]
Post subject:  Re: Diff Gears, what size tyres etc
Do it and then fit 36's
Author:  suzookyman [ Fri Dec 30, 2011 12:47 am ]
Post subject:  Re: Diff Gears, what size tyres etc
zukmeista wrote:
Did the calculations. Your current RPM at 100km/h is about 3500. Your new RPM with the 1.0l case and 5.12:1 diff gears will be about 4750, or in other words, revving its nuts off :lol: If you put a standard transfer in with 5.12:1 diff gears your RPM will be 4250, so not much better. I think you would be much better to just leave the diffs alone and either buy transfer gears or do a rocklobster because at the moment your high range gearing is about standard so you probably don't want to change it.
When I did the calcs I used the numbers from the factory owners manual and I got the 1.0l transfer ratios from one of 303zukes posts. :helloo:

And what size tyres did you use for those calculations, Al
Author:  zukmeista [ Fri Dec 30, 2011 1:00 am ]
Post subject:  Re: Diff Gears, what size tyres etc
31"
Author:  zukmeista [ Fri Dec 30, 2011 1:08 am ]
Post subject:  Re: Diff Gears, what size tyres etc
And with 33's with 5.12 diff gears and 1.0l tcase the revs at 100 will be 4500. With a standard tcase and 5.12 diff gears it will be about 4000.
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