Wow! I dont remember where i read that 187hp at the wheels was the number for the 3.6l. Thanks, now just wait and see what it does with the intake and exhaust, my guess is about 16-20 hp more!

 

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Interesting stuff. There is a clip on you tube where a stock 2012 JK with standard tires put out 187. I'm surprised the 35in tires didn't lower horsepower.

I am installing the exhaust tomorrow. I have 1700 miles on my rig. I hear the computer limits the motor for the first 2000 miles for break in.

I plan on getting mine dynod next Saturday. I'm a man of my word, it will be done.

 

I was just glad I found your post before I made any engine performance mods. I wish I had thought to baseline it while it was fully stock. At least I have this now with the 35s and can benchmark it again once I figure out what mod(s) to do. I find this very interesting and $75 isn't too high a price to satisfy my curiosity. (I have plenty of other satisfactions that cost me more)

 

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That's a lot of power lost between the motor and the wheels on the '12. The '07 checked in at 152 and the '12 (90hp more) checked in at 187. I know one was an auto and one was a manual but I would have expected more of a difference between them.

 

Not only will this string help people understand the benefits of intake /exhaust restriction, it will show the effects of tire size and gear ratio on the horsepower and torque to hit the ground.

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I think the delta I saw once was 202 HP for the 3.8 and 285 for the 3.6. That's an 83 HP delta. I don't know what the '07 driveline was and can't say what his tires were to account for any differences in weight, rotational / rolling resistances. Hopefully we can hear from some folks with more knowledge than I can offer at this point. I wonder how much HP the 5-speed auto trans takes to spin?

 

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I hear that!