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JK with 40+ Tires

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Old 04-02-2017, 02:01 PM
  #321  
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Originally Posted by numbah1
Just wondering what everyone here on 40's are getting for their mpg. Mine is a 2012 JKU on 40" ProComp MT2. I'm running 4.88 gears with a Banks CAI and am averaging nearly 17 mixed city/highway. I was getting roughly 15.5 mg (mixed) on 37's before and thought that was good... until now. Is anyone else getting about the same or better?
Damn! I get 12-13 on 37s, but I could stand to regear. Not going to waste the money though, because 1 tons are in my future.
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Old 04-05-2017, 03:34 AM
  #322  
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Originally Posted by numbah1
Just wondering what everyone here on 40's are getting for their mpg. Mine is a 2012 JKU on 40" ProComp MT2. I'm running 4.88 gears with a Banks CAI and am averaging nearly 17 mixed city/highway. I was getting roughly 15.5 mg (mixed) on 37's before and thought that was good... until now. Is anyone else getting about the same or better?
I average about 13.3 mpg with 37's and 4:10 gears.
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Old 04-06-2017, 05:02 AM
  #323  
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UD 60's, Raceline 233's, Cooper STT Pro 40"


Click image for larger version Name: IMG_0990_zpsqxa60wrq.jpg Views: 504 Size: 106.6 KB ID: 669786
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Old 04-06-2017, 07:43 AM
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Old 04-06-2017, 08:16 AM
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Originally Posted by tcdawg
UD 60's, Raceline 233's, Cooper STT Pro 40" <img src="https://www.jk-forum.com/forums/attachment.php?attachmentid=669786"/>
Outstanding
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Old 04-06-2017, 08:16 AM
  #326  
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Sick man
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Old 08-19-2017, 06:53 PM
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Originally Posted by numbah1
Just wondering what everyone here on 40's are getting for their mpg.

Mine is a 2012 JKU on 40" ProComp MT2. I'm running 4.88 gears with a Banks CAI and am averaging nearly 17 mixed city/highway. I was getting roughly 15.5 mg (mixed) on 37's before and thought that was good... until now.

Is anyone else getting about the same or better?
I am averaging almost 17 mpg on 42' tires, Dynatrac PR 60/80 combo; Ripp Supercharger with an about to be released "XL Kit" with new tune with a really nice upgrade in power and efficiency on and off the road.
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Old 08-20-2017, 10:43 PM
  #328  
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Default coilover+bybass??
Good morning please i need help, i have JK 2010 with v8 and 40" tire and i am installing now coilover.. the question do i need to install bypass shocks as well for the front thanks.
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Old 08-21-2017, 05:18 AM
  #329  
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No you don't have to install a bypass unless you want the extra tuning they offer. Todays coil overs are offered with internal bypass and compression adjusters and for the most part will give enough adjustment unless you are racing it.
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Old 08-21-2017, 06:15 AM
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Originally Posted by TheDirtman
No you don't have to install a bypass unless you want the extra tuning they offer. Todays coil overs are offered with internal bypass and compression adjusters and for the most part will give enough adjustment unless you are racing it.
ok thank you
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