Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: MOCAJ on July 09, 2008, 09:55:54 PM

Title: TJ on 33,s, what ratio ?
Post by: MOCAJ on July 09, 2008, 09:55:54 PM
What do folks recomend  :?:
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Post by: greggmo on July 09, 2008, 09:58:13 PM
4.11 all day long. 4.56 is way too low. ask if you can have a drive in mandas next tim we are out. or ya could always go 4.88 like me :lol:
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Post by: MOCAJ on July 09, 2008, 10:03:34 PM
but you only got rubber band power  :-D
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Post by: greggmo on July 09, 2008, 10:10:57 PM
remember....going bigger just means getting stuck in more stoopid places. oh and spongebob will remember rubber band power next time you get stuck :lol: git. :lol:
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Post by: MOCAJ on July 09, 2008, 10:20:06 PM
sorry spongebob  :?:

need it to be driveable on road but good on the slippy stuff. Will be locked off road when needed
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Post by: Mik on July 09, 2008, 10:22:57 PM
4L
Auto - 411
Manual - 456

2.5L
Buy a 4L
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Post by: MOCAJ on July 09, 2008, 10:29:14 PM
mmm,

so which puts the ratio back to where it was stock with 28's or whatever they were factory fitted  :-?
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Post by: Mik on July 09, 2008, 11:34:15 PM
http://jeephorizons.com/tech/rpmchart.html (http://jeephorizons.com/tech/rpmchart.html)
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Post by: isle of man on July 10, 2008, 03:40:28 AM
33" tyres and 4.56 R&P is the ideal combination.
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Post by: GermanXJ on July 10, 2008, 07:31:06 AM
Quote from: "Mik"
4L
Auto - 411
Manual - 456

2.5L
Buy a 4L



 :lol:
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Post by: wrangler on July 10, 2008, 08:55:09 AM
Quote from: "Mik"
4L
Auto - 411
Manual - 456

2.5L
Buy a 4L


Very good!
Waggers
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Post by: Asylum on July 10, 2008, 12:40:20 PM
Bear in mind the calculations done for 33inch tyres to get correct gear ratios are true to the measurement.

If you go 4.56 and buy bfg 33's then you will feel the truck is overgeared because the tyres dont actualy measure 33inch's they measure 31.2 ish

The 31s your running at the moment are more like 29.6inches

SO unless the tyres you put on are true size the ideal gear ratio wont apply.

Put some 37 boggers on that are actualy 35.8 and 4.88 gearing. You'll be happy with that!! 8-)
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Post by: MOCAJ on July 10, 2008, 06:40:52 PM
just been out with the tape measure and your right clayt

now im totally confused :smt102
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Post by: MOCAJ on July 10, 2008, 06:47:20 PM
ok then, cos im confused already, lets make it even more complex

what difference does 8" rims or 10" rims make to the outside diameter of the tyres and thus the gear ratio, still talking 33's, prob bfg 33x1250x15
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Post by: isle of man on July 10, 2008, 07:14:58 PM
Quote from: "my other cars a jeep"
ok then, cos im confused already, lets make it even more complex

what difference does 8" rims or 10" rims make to the outside diameter of the tyres and thus the gear ratio, still talking 33's, prob bfg 33x1250x15


for that tyre you will need to change your back spacing  on the wheels to 4.75 i think will double check for you, if necessary take a photo.


i stand by my first statement about the 4,56 gearing it's like samson and delilah - it goes together.





and clayt.........i have 37" boggers and 5.13 gearing and that is correct. 4.88 would be too short!!!!
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Post by: Asylum on July 10, 2008, 07:34:54 PM
Quote from: "isle of man"

and clayt.........i have 37" boggers and 5.13 gearing and that is correct. 4.88 would be too short!!!!



No worries mate, I was just guessing the gear ratio for 37's of 4.88 as 37 boggers are my aim but not quite got there yet.  :lol:
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Post by: isle of man on July 10, 2008, 07:57:52 PM
37" is a "BIG STEP" in jeep speak........clayt, join the club you will not regret it.
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Post by: greggmo on July 10, 2008, 09:33:12 PM
or better still go with 35's and throw a 360ci in it. just like fatso. 8-)