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Chris D
Mud Obsessed
Joined: 24 May 2005
Odometer: 2432
Location: peterlee
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 Posted: Tue Sep 30, 2008 8:51 pm Post subject: 1.6, vit gearbox twin t-case work it out?
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right am going to be fitting another 1.6 8v with su, then am fitting a 3 speed auto, with vit t-case (special one) and a rocklobster and my axles are 4.88 with 35 tyres
can any one work that out for me?
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Little Toe
Articulating
Joined: 08 Sep 2008
Odometer: 507
Location: Derby
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| Posted: Tue Sep 30, 2008 9:00 pm Post subject:
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Hi Chris,
Low ratio in 1st will be something in the order of 25:1, but will need to check on the Vit auto box ratio's
Cheers
Shaun
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Cheers,
Shaun
IBA Member #40051
www.ironbutt.org |
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Nathaniel
Difflock Royalty
Joined: 13 May 2003
Odometer: 17901
Location: North, North Yorkshire
1979 Suzuki LJ
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| Posted: Wed Oct 01, 2008 6:10 pm Post subject:
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Fill in the blanks and we can work it out
1st gear in the autobox ????
Vitara Tcase in Lo ????
Rocklobster Tcase in Lo 4.10
Yota Diffs 4.88
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Nat
If You Open Your Mind Too Much Your Brain Will Fall Out |
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rockwatt
Off-Road Guru
Joined: 25 Jul 2007
Odometer: 1542
Location: North lincs
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| Posted: Wed Oct 01, 2008 7:24 pm Post subject:
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1st low low =92.16:1 
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Rocklobster gears / refurb cases /rockbuckets/SU manifolds/dual transfer boxes/ sj tcase to jimny cradles and speedo drives/bespoke machining / any thing made to a drawing.
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rockwatt
Off-Road Guru
Joined: 25 Jul 2007
Odometer: 1542
Location: North lincs
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| Posted: Wed Oct 01, 2008 7:33 pm Post subject:
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| Nathaniel wrote: | Fill in the blanks and we can work it out
1st gear in the autobox ????
Vitara Tcase in Lo ????
Rocklobster Tcase in Lo 4.10
Yota Diffs 4.88 |
2.4:1
1.816:1
4.16:1
4.88:1
Its about time you fitted it 
__________________________________
Rocklobster gears / refurb cases /rockbuckets/SU manifolds/dual transfer boxes/ sj tcase to jimny cradles and speedo drives/bespoke machining / any thing made to a drawing.
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Nathaniel
Difflock Royalty
Joined: 13 May 2003
Odometer: 17901
Location: North, North Yorkshire
1979 Suzuki LJ
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| Posted: Wed Oct 01, 2008 8:13 pm Post subject:
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| rockratt47 wrote: | | 1st low low =92.16:1 |
hmm. thats kinda useful!
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Nat
If You Open Your Mind Too Much Your Brain Will Fall Out |
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Chris D
Mud Obsessed
Joined: 24 May 2005
Odometer: 2432
Location: peterlee
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| Posted: Thu Oct 02, 2008 11:24 am Post subject:
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is that good?  going to start fitting it this weekend
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StuartL
Just got MTs
Joined: 19 Mar 2007
Odometer: 247
Location: Thatcham, Berkshire, UK
1994 Suzuki Vitara
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| Posted: Thu Oct 02, 2008 1:28 pm Post subject:
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| rockratt47 wrote: |
2.4:1
1.816:1
4.16:1
4.88:1
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I make this 88.5:1, which at 1000rpm at the crankshaft is about one rev every five seconds.
If you've a 35" tyre each revolution is 2.8 metres per revolution. Therefore your speed will be a healthy half a metre per second or just over one mile per hour.
You could exceed walking pace by thrashing the engine...
I think a scarier figure is the torque at the axle if you stall the wheel, which I don't even want to think about working out. Toyota axles are strong, but are they that strong?
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Chris D
Mud Obsessed
Joined: 24 May 2005
Odometer: 2432
Location: peterlee
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| Posted: Thu Oct 02, 2008 2:08 pm Post subject:
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i have spares!!!!! 
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Nathaniel
Difflock Royalty
Joined: 13 May 2003
Odometer: 17901
Location: North, North Yorkshire
1979 Suzuki LJ
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| Posted: Thu Oct 02, 2008 2:38 pm Post subject:
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Yeah I make it 88.425:1 too
So at 1000RPM with his 37" Tyres he is gonna be doing 1.245mph
Still quite fast really.....
The yanks reckon 250:1 for proper rock crawling but I think we're safe in this country....
This is what I was building....
But I gave that up!
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Nat
If You Open Your Mind Too Much Your Brain Will Fall Out |
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rockwatt
Off-Road Guru
Joined: 25 Jul 2007
Odometer: 1542
Location: North lincs
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| Posted: Thu Oct 02, 2008 3:15 pm Post subject:
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| Nathaniel wrote: | | Yeah I make it 88.425:1 to |
I just worked it out again and i got that. must have typeod on me calc 
Thats a good ratio with an auto.
__________________________________
Rocklobster gears / refurb cases /rockbuckets/SU manifolds/dual transfer boxes/ sj tcase to jimny cradles and speedo drives/bespoke machining / any thing made to a drawing.
email me for details
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Tiny One
Mud Obsessed
Joined: 22 Jun 2006
Odometer: 3168
Location: Aberhonddu
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| Posted: Thu Oct 02, 2008 3:40 pm Post subject:
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I calculated that with standard vehicle parts I could achieve 900+:1 ratio!!
but my project is currently going to be....
with vit diffs
fairly respectable I believe 
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"Blind as a welders dog!" |
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rockwatt
Off-Road Guru
Joined: 25 Jul 2007
Odometer: 1542
Location: North lincs
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| Posted: Thu Oct 02, 2008 4:25 pm Post subject:
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the triple i built was
3.652:1 1st
1.816:1 low
1.816:1 low
4.16:1 low
5.125 diff
Gives a final of 256.773:1
The one in mine is
3.652:1
1.816:1
4.16:1
4.56:1
=125.8:1
Thats plenty imo .
That makes the high box spot on for 33/35's on the road.
__________________________________
Rocklobster gears / refurb cases /rockbuckets/SU manifolds/dual transfer boxes/ sj tcase to jimny cradles and speedo drives/bespoke machining / any thing made to a drawing.
email me for details
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rockwatt
Off-Road Guru
Joined: 25 Jul 2007
Odometer: 1542
Location: North lincs
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| Posted: Thu Oct 02, 2008 4:39 pm Post subject:
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| Nathaniel wrote: | So at 1000RPM with his 37" Tyres he is gonna be doing 1.245mph
Still quite fast really..... |
You can reduce that much more nat. That figure would be true for a manual box but an auto is only just getting grip in the torque coverter at 1000rpm.
At a guess at 1000rpm your final could be as high as 200:1 reduceing as the rev's increase.
Like i said thats good for an auto. 
__________________________________
Rocklobster gears / refurb cases /rockbuckets/SU manifolds/dual transfer boxes/ sj tcase to jimny cradles and speedo drives/bespoke machining / any thing made to a drawing.
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Tiny One
Mud Obsessed
Joined: 22 Jun 2006
Odometer: 3168
Location: Aberhonddu
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| Posted: Thu Oct 02, 2008 5:59 pm Post subject:
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so what gearbox do you have?
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rockwatt
Off-Road Guru
Joined: 25 Jul 2007
Odometer: 1542
Location: North lincs
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| Posted: Thu Oct 02, 2008 8:03 pm Post subject:
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| Tiny One wrote: | | so what gearbox do you have? |
Sorry who is that question for.
__________________________________
Rocklobster gears / refurb cases /rockbuckets/SU manifolds/dual transfer boxes/ sj tcase to jimny cradles and speedo drives/bespoke machining / any thing made to a drawing.
email me for details
Find me on Facebook https://www.facebook.com/RockwattEng |
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Chris D
Mud Obsessed
Joined: 24 May 2005
Odometer: 2432
Location: peterlee
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| Posted: Mon Nov 03, 2008 4:11 pm Post subject:
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right so what if i ran a 1.6 16v? any idea what the engine will be doing at about 60mph???
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Want a rollcage in the northeast? pm me
lots of bits forsale....... |
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(pete)
Mud Obsessed
Joined: 19 Nov 2006
Odometer: 5806
Location: aldershot
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| Posted: Mon Nov 03, 2008 4:35 pm Post subject:
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right so what if i ran a 1.6 16v? any idea what the engine will be doing at about 60mph???
ummm same as the car i hope 60mph
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X-RATED 4x4 systems |
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suzukitrayback
Off-Road Guru
Joined: 22 Dec 2007
Odometer: 1325
Location: westmids walsall brownhills
1992 Suzuki SJ
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callagas
Articulating
Joined: 17 Oct 2007
Odometer: 760
Location: East Midlands
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Chris D
Mud Obsessed
Joined: 24 May 2005
Odometer: 2432
Location: peterlee
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| Posted: Mon Nov 03, 2008 8:53 pm Post subject:
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ha ha
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Want a rollcage in the northeast? pm me
lots of bits forsale....... |
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Nathaniel
Difflock Royalty
Joined: 13 May 2003
Odometer: 17901
Location: North, North Yorkshire
1979 Suzuki LJ
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| Posted: Mon Nov 03, 2008 9:59 pm Post subject:
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| Chris D wrote: | | right so what if i ran a 1.6 16v? any idea what the engine will be doing at about 60mph??? |
Fill in the blanks and we can work it out
3rd gear in the autobox ????
Vitara Tcase in hi ????
Rocklobster Tcase in hi?
Yota Diffs 4.88
__________________________________
Nat
If You Open Your Mind Too Much Your Brain Will Fall Out |
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rockwatt
Off-Road Guru
Joined: 25 Jul 2007
Odometer: 1542
Location: North lincs
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| Posted: Mon Nov 03, 2008 10:33 pm Post subject:
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| Nathaniel wrote: | | Chris D wrote: | | right so what if i ran a 1.6 16v? any idea what the engine will be doing at about 60mph??? |
Fill in the blanks and we can work it out
3rd gear in the autobox ???? 1:1
Vitara Tcase in hi ???? 1:1
Rocklobster Tcase in hi? 1.57808:1
Yota Diffs 4.88 |
there you go
__________________________________
Rocklobster gears / refurb cases /rockbuckets/SU manifolds/dual transfer boxes/ sj tcase to jimny cradles and speedo drives/bespoke machining / any thing made to a drawing.
email me for details
Find me on Facebook https://www.facebook.com/RockwattEng |
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