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AccuTune Off-Road JK Build

12K views 29 replies 9 participants last post by  tapcola 
#1 ·
Hey all, we bought a JK and been wrenching and wheeling away.

Got it the week before EJS and immediately started changing things.

40" BFG KR3's
BTR Wheels
5.13 gears
Arb and 35 spline Nitro rear axle
Fox 2.0 shocks and Fox IFP air bumps
Our prototype rear springs
4.5" lift, 5" up Travel, 12" Total Travel
 

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#3 ·
Spent lots of time flexing it out, adjusting air bump height (threaded air bumps for the win!), and cutting things.

Ended up realizing the front bumper couldn't clear 40's
 

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#4 ·
Ditched the PSC bumper and upgraded to a really nice VKS Fab bumper (love this thing!) and Warn Zeon winch (has already seen lots of use).

Did a little urban wheeling and got ready for EJS.
 

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#5 ·
Went wheeling at Moab with some new friends.
 

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#8 ·
Hit some rocks while out at Johnson Valley. Also used the winch to rescue the race truck from the mud.
 

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#10 ·
Went back out to J.V. making it two weekends in a row. They say it's not a job when you love what you do, and they're correct!

Woke up early and did more shock tuning on the Fox 2.0 JK shocks. Now have two tunes. The original is good for exploration type wheeling with a super smooth ride, but will still let you play in the whoops a bit. The new "Johnson Valley Tune" is good for going fast. JK's with 5"+ of up travel and air bumps can straight get after it!
 

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#11 ·
Then I took the JK up Clawhammer and Wrecking ball with a bunch of Toyota's and an Ultra 4 car. It was a ton of fun, and also full of carnage. Time for one tons and better sliders.
 

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#12 ·
More pics, more carnage...
 

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#21 ·
Should have known that was going to happen .
He broke what appears to be a stock axle shaft after multiple trips. Depending on year model he could even have the puny version of those shafts. Id say that's pretty good considering that according to pretty much everyone on this site the second you bolt on a 40" tire the axle is supposed to grenade as you tighten the last lug nut.
 
#20 ·
We went out tuning again the other week. Got some more video of the JK and some of the TJ on trailing arms that we tuned.

 

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#22 ·
#23 ·
Then we started testing IBP's with only 3" of lift and 4" of up travel. Pics from Thanksgiving at JV.






We were also managed to bend the front axle. Testing is hard on vehicles!
 

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#25 ·
Testing went really well and I was blown away how well it worked for the first time in the dirt with IBP's and 4" of up travel. With that little up travel every tiny bit of travel needs to be perfectly controlled to deliver the ride quality and performance expected from bypass shocks. We still have more to do, but it's pretty damn close. Hope to have it wrapped up in the next month.
 
#26 ·
We've been tuning and wheeling up a storm, as well as testing some new products.


Here are some pics from wheeling at New Years.
 

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