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Modified JK Tech Tech related bulletin board forum regarding subjects such as suspension, tires & wheels, steering, bumpers, skid plates, drive train, cages, on-board air and other useful modifications that will help improve the performance and protection of your Jeep JK Wrangler (Rubicon, Sahara, Unlimited and X) on the trail.

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Jet module or K&N air filter?

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Old Aug 30, 2007 | 10:20 AM
  #11  
WranglerChuck's Avatar
Thread Starter
JK Newbie
 
Joined: Aug 2007
Posts: 10
Likes: 0
From: Kettering, Ohio
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Originally Posted by phreakgeek
the first thing i would do is find out your gearing
if you have the 3.21 or 3.73 on 32s or 33s its going to be crap...
4.10s on those size is what you should have...
just my thought.......
That brings up another subject...

Where do you go to get an upgrade on the axle ratio and how much should it cost?

Yeah, mine is 3.21. :sad:
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Old Aug 30, 2007 | 10:22 AM
  #12  
SabrToothSqrl's Avatar
JK Super Freak
 
Joined: Dec 2006
Posts: 1,002
Likes: 2
Default lol

Originally Posted by WranglerChuck
Your story sounds like mine! I got the bigger tires knowing that there would be a difference, but after fighting to keep this vehicle going exactly 70 miles and hour with the 6th gear, I need to change something.


how about gears? change to FIFTH gear... problem solved

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Old Aug 31, 2007 | 03:39 AM
  #13  
b1pig's Avatar
JK Enthusiast
 
Joined: Feb 2007
Posts: 274
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From: ray city, ga
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Originally Posted by kryptos1
I purchased the Jet Module thinking it was the best HP for the Buck value (they claim 25Hp). Mistake on my part, hardly know the difference and waste of 250+ bucks. Maybe it does need additional mods to notice. When it arrived, seemed to be a generic Chrysler module and not Jeep specific.

My 2 cents....
i'll give ya $30 shipped.
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Old Aug 31, 2007 | 07:16 AM
  #14  
Bubbamacrei's Avatar
JK Newbie
 
Joined: Aug 2007
Posts: 32
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From: Kensington, Maryland
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I just did both on my Jk.
I have 33's.
I used the Jet PackII and cold air, Air force air jam. Results right away. Even better after a few days. I've got a 6 speed. I've heard that it's not as noticable on automatics.
I think it was a good investment.
According to the specks i added about 37 - 40 hp. I don't have access to a dyno tester to know if that is true or not but I did feel more power.
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