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ZUKIWORLD Discussion Forum => Suzuki 4x4 Forum => Topic started by: PWSX3 on May 07, 2005, 04:28:22 AM

Title: size gears with 31" tires??
Post by: PWSX3 on May 07, 2005, 04:28:22 AM: I have noticed a lot of discussions for what gears are good with 35" tires, but we are only going to run 31" tires so what is a good combo of gears and 31" tires????
We are doing the 1.6 engine swap so will that be enough power to use stock gears and 31"s???

TIA for the help
Title: Re: size gears with 31" tires??
Post by: bashzuk on May 07, 2005, 06:08:11 AM: is it for a sammy or a track/kick
if it is for a sammy 4.1:1 transfercase gears are what I was told.
Unless you want to do R & P and then I'm still looking for that answer.
Title: Re: size gears with 31" tires??
Post by: PWSX3 on May 07, 2005, 09:57:54 AM: It's for a Sami!!
Title: Re: size gears with 31" tires??
Post by: SnoFalls on May 08, 2005, 02:41:36 AM: http://www.izook.com/tech/math/gearcalc.htm

top calculator takes old and new tire diameter and current gear ration and will compute the new gear ratio.
Title: Re: size gears with 31" tires??
Post by: PWSX3 on May 11, 2005, 11:13:00 AM: Quote

[url]http://www.izook.com/tech/math/gearcalc.htm[/url]

top calculator takes old and new tire diameter and current gear ration and will compute the new gear ratio.

I don't know what the gear ratio is on the Samurai. Need some help with that one.
Title: Re: size gears with 31" tires??
Post by: 92Sidekick4x4 on May 11, 2005, 11:35:33 AM: what is the stock tire diameter on the kick?
Title: Re: size gears with 31" tires??
Post by: bashzuk on May 11, 2005, 12:54:18 PM: the samurai has 3.73 stock gears in the Ring and Pinion.

stock tire size on samurai is 205/70/15 or 205/75/15 I believe.
I used 26 inches for stock size

30 = 4.3038
31 = 4.4473
32 = 4.590769230769231 or 4.6
33 = 4.734230769230769
34 = 4.877692307692308
35 = 5.0211538461538465
36 = 5.164615384615384
37 = 5.308076923076923
Title: Re: size gears with 31" tires??
Post by: SnoFalls on May 11, 2005, 10:58:30 PM: Note that you can do the same for your tcase ...

using old tires as 26" and "current gear ratio" of 1 (tcase high range)...

30 = 1.1538
31 = 1.1923
32 = 1.2307
33 = 1.2692

So, a 20% high range reduction on the tcase and 31's will turn the same RPM on the tach as stock.
Title: Re: size gears with 31" tires??
Post by: tracker8wr on May 12, 2005, 12:59:41 AM: actually syock t-case i range in a sami reduces 1.49:1
so u need to figure calculations from there.
Title: Re: size gears with 31" tires??
Post by: HUMZUKI on May 12, 2005, 02:22:46 AM: Quote

We are doing the 1.6 engine swap so will that be enough power to use stock gears and 31"s???

TIA for the help

I ran 31"LTB's with stock gearing( WITH the older tall 5th tranny) And I STILL used 5th but wind resistance would make me shift back to 4th after a while.

I could use 5th all the time with the newer lower 5th gear tranny. My 1.6 Is pretty wicked though. ;D

The only thing I can say about gearing is that once I put 5:14 gears in 31's were too small 33's are just about perfect now.
Title: Re: size gears with 31" tires??
Post by: purevil71 on May 12, 2005, 07:31:04 AM: I ran a 4.1 T-Case with my 31's and it was pretty good on the road (I have a 88.5 with the newer tranny also), then when I put my 4.62 diffs in, I had too much gear and too little tire. I seem to be right on with my 33's I have on there now.
Title: Re: size gears with 31" tires??
Post by: SnoFalls on May 12, 2005, 08:49:20 AM: Quote
actually syock t-case i range in a sami reduces 1.49:1
so u need to figure calculations from there.

whoops my bad ... (kick is 1.00 in hi tho :) )