OP
TJ Intake Shootout w/ Dyno Results (JP Magazine)
- Thread starter Fouledplugs
- Start date
sgtjdgelinas
TJ Enthusiast
Makes sense that the Mopar kit showed the most gain. And a 13 hp bump isn't too bad for one mod.
In our shop that was referred to as an "Assometer".
Many here are correct about running a vehicle on a chassis dyno. An indicator, not an instrument is a good way of discriping a chassis dyno. If you're serious about checking horsepower you need to dyno just the motor on a regularly calibrated, instrumented ENGINE dyno.
Also, Jerry is spot on about the amount of dirt a K&N filter passes compared to stock. I've seen the proof in lab testing. Stick with a stock filter especially in the dusty deserts of the SW
Head Lice
TJ Addict
A fat torque curve that comes on early and stays fat to 5250 rpm is generally what you'll feel in the seat of your pants.
Folks kinda' get hung-up on horsepower numbers ..... torque curve shape is more important.
In reality, an 'intake only' modification doesn't mean much all by itself, unless the OEM intake system is severely restricted.
Folks kinda' get hung-up on horsepower numbers ..... torque curve shape is more important.
In reality, an 'intake only' modification doesn't mean much all by itself, unless the OEM intake system is severely restricted.
Which of course the TJ's is definitely not. The TJ's air intake is wide open and easily flows more air than the engine can pull at redline rpms.
Last edited:
The previous owner of my Jeep had the K&N CAI installed. It was the first thing I removed. I sold it and put the stock air box back on it. Living in Arizona and dealing with the dust and dirt on a regular basis didn't instill any confidence with the K&N setup. Upon removal, there was visible dust on the inside of the K&N tubing. Stock air box with ACDelco filter is the option I'm comfortable with.
Last edited:
Learned a good lesson viewing this site. I removed the throttle body spacer, and the CAI, went back to full stock. The jeep runs fantastic, and gas mileage is about the same without a head wind...... hit 19mpg on the last trip to California. 
Still dreaming for that 22-23 mpg.......Ha !
Still dreaming for that 22-23 mpg.......Ha ! 
Jughead
Member
I just took off an AEM Brute Force intake and TB spacer and installed the factory system. It might just be in my head but I swear it feels if the Jeep is running better.
badlieutenant
TJ Addict
I will -never- spend my money on a K&N. It's disappointing how a company can sell such an inferior product in terms of both gains and filtration (much more important than gains) and charge what they do. On top of that, cleaning and oiling the filter is a PITA. I just buy ACDelco or Fram and throw it in my stock air box.