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Do CAI's actually make power on the Hemi?

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6K views 13 replies 10 participants last post by  Evolv0 
#1 ·
Hi folks, new to the GC but not new to modding! I just purchased a '14 V8 Overland and I absolutely love it. Curious if anyone has REAL WORLD proof that the intakes add power. I have searched and can't seem to find anything on the forum, other than added MPG benefits and butt dyno impressions. Seems like most folks are going the aFe route vs Mopar. But I can't find a dyno sheet or any info that shows that these things actually improve HP and TQ.

Can anyone here shed some light for me? I'm coming from a BMW M car where the intakes didn't add a bit of power. My first modded car was a Nissan and it picked up 12 or so HP from a CAI so I know it depends on the car.

Thanks for your help!
 
#6 ·
That link had a good thread that went downhill quickly. My take is you won't get much out of an intake system. I know the dyno in that thread showed 50 rw ftlbs increase, but I don't buy it. Dyno runs are not 100 percent and the operator can change the outcome.
Running it down a track is going to show you a more accurate increase of power.
 
#7 ·
K&N provides horsepower and torque numbers for their CAI.

Mopar does not provide numbers, but the throttle response is definitely better.
 
#8 · (Edited)
I also have a 2014 Jeep Grand Cherokee Overland with the 5.7L Hemi and I can say that the mods that I have done on mine have helped. I removed the OEM exhaust and installed a Magnaflow #16929 Stainless Cat-Back Performance Exhaust System. I also installed the Mopar OEM Cold Air Intake Kit. I removed the stock OEM throttle body and installed the Moe's Performance Ported Throttle Body 87MM. All that helped but Jeep has the 5.7 Hemi so locked down I went ahead and got the DCX in Tune I-1000 Tuning System. Sean at HemiFever wrote me a 93 octane program and I installed it and MAN the Hemi came alive. Best thing that was ever done when I applied this to my engine. You can reapply the stock program anytime. The unit keeps the factory stock program so if you need to take your Jeep to dealer it will have the factory program in the PCM. Have done mine several times when my Jeep was taken back to dealer. Then when I get it back home I reinstall the performance tune back into the PCM. All in all I am very happy with my mods. Jeep sounds good and runs great. :)
 
#10 ·
I don't know if what I did would be considered prove of gain or not. Anyway, I ran my car against a Ram 1500 before and after. Before installing Volant CAI, I stayed in front until 60 mph and then the Ram pulled me and pass me at around 80-85 mph. After CAI, he pulls me a little slower and as soon as he pass me, he hits the speed limiter which is 105 mph.

Also, from my day to day driving, I feel the car lighter on low to mid rpms after I installed CAI. So, I would say there's some gain at least in TQ.
 
#12 ·
Got the same model. Just picked her up 4 days ago. Looking into these. Don't know where to start though.
 
#13 ·
I can tell you if the PCM is anything like the Hemi PCM that was on my 05 Magnum R/T the computer has "adaptives". What ever you do (CAI, Cat Back etc) the computer figures it out and eventually the HP number goes back to where they were from the factory. The only thing that will have a lasting effect is a tune. Some even said back then that the adaptives were in play after Super Chips tune was loaded(I don't know if thats true or not). If you like the sound you new Intake or Cat-back makes enjoy it. I sure do
 
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