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  #1  
Old 09-07-2016, 07:33 PM
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HemiFever vs. DiabloSport tunes

On the dyno the 91 and 93 octane tunes from DiabloSport made the best overall power and torque when compared to (2) HemiFever 93 octane custom tunes. The overall winner was the 91 octane tune from DiabloSport with the best peak AWHP, AWTQ and area underneath the curve. Please note, I use 93 octane gasoline all the time due to the knock that is seen by this vehicle.

At the dragstrip the best time I got from either tune was the following: DiabloSport 91 octane tune: 14.591@94.97 MPH
HemiFever 93 Octane tune: 14.580@95.18 MPH

So who's the winner? In my opinion, you can't lose with either choice.



So what's next in the performance department for my 2014 JGC 5.7L? I honestly don't know. Nitrous was an option but most people don't like it on this 5.7L engine due to how close the ring-lands are to the top of the pistons. I tried a cat-back exhaust system from Corsa and saw no HP or TQ improvement. Plus, I hated the sound.....so I sold it. I may try a throttle body but my experience tells me it won't make a difference but the company that makes the one I'm considering, swears up and down it will pickup power.......so I haven't decided as of yet what to do next. Maybe I should sell this Overland and pickup a 2014 or 2015 JGC SRT

Thanks and I hope this helps someone
Michael Plummer

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  #2  
Old 09-07-2016, 11:09 PM
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Re: HemiFever vs. DiabloSport tunes

Cool! I got both and can't really decide what's the best, it's more torque on low rpm with the Hemitune, I think I gonna ask for Hemitune to tweak my custom tune a little.

Let me know what you decide to do more, I only got the k&n air filter and muffler delete with straight pipe, I like the sound like that, with the tune so far.
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  #3  
Old 09-08-2016, 07:03 AM
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Re: HemiFever vs. DiabloSport tunes

Hey Sweed,
Are you checking any dadtalogs on how active your knock sensors are? Honestly, there is only so much power and torque you can get out of a stock engine. Making more tweaks and more tweaks really doesn't gain anything except maybe more activity from your knock sensors.

Muffler deletes, cat-back systems are all subjective to the owner. If you like a more aggressive note than that's cool. I swapped (3) different mufflers on my Mustang to get the sound I wanted.

Surprised you haven't looked into a Pedal Commander or Sprint Booster. Either one will decrease the delay from your stk. drive-by wire throttle system. Personally, I prefer the Pedal Commander because of the many different modes you have access to vs. the two you have with Sprint Booster.

Michael Plummer
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Old 09-08-2016, 12:23 PM
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Re: HemiFever vs. DiabloSport tunes

jeeps are not made really to run against mustangs and camaros, but they can rear end gearing is different, if you start shooting nitro down into the 5.7 not ready for it it will spend more time being rebuilt then running.
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Old 09-08-2016, 01:03 PM
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Re: HemiFever vs. DiabloSport tunes

Quote:
Originally Posted by Michael Plummer View Post
At the dragstrip the best time I got from either tune was the following: DiabloSport 91 octane tune: 14.591@94.97 MPH
HemiFever 93 Octane tune: 14.580@95.18 MPH

So who's the winner? In my opinion, you can't lose with either choice.
Michael - this helps a lot of people. Thanks for spending the time and money on this!

This goes to show that FCA did their homework when they developed the 5.7. They didn't leave anything on the table, and there's only so much tuning you can do to squeeze the last 10 HP out of the motor.

The limitations clearly aren't the intake, exhaust, and tuning. Next stop is hard parts - Cam and Heads.

You may find gains with a larger TB, but you may be trading HP/TQ at different parts of the powerband.

I am a pretty disappointed with the results of the Hemifever tune - but again, that's only one data point with your vehicle.
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Old 09-08-2016, 05:21 PM
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Re: HemiFever vs. DiabloSport tunes

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Originally Posted by dallas1 View Post
jeeps are not made really to run against mustangs and camaros, but they can rear end gearing is different, if you start shooting nitro down into the 5.7 not ready for it it will spend more time being rebuilt then running.
I know the pros and cons of Nitrous having run it before in 3 different vehicles but I didn't know about the Jeep 5.7L engine. After doing some research I decided it wasn't for me with this vehicle.
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Old 09-08-2016, 05:24 PM
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Re: HemiFever vs. DiabloSport tunes

AJ's tunes will always be the best in my book. That being said be patient with his response times when he's working late on the dyno.
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Old 09-08-2016, 05:37 PM
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Re: HemiFever vs. DiabloSport tunes

Quote:
Originally Posted by DrSpeed View Post
Michael - this helps a lot of people. Thanks for spending the time and money on this!
You're welcome


Quote:
Originally Posted by DrSpeed View Post
This goes to show that FCA did their homework when they developed the 5.7. They didn't leave anything on the table, and there's only so much tuning you can do to squeeze the last 10 HP out of the motor.
Agreed but the one thing I don't have is a stock baseline for my Jeep. Granted it picked up HP and TQ from the little mods I added but it would be nice to see what a stk. 2014-2016 JGC 5.7L runs.


Quote:
Originally Posted by DrSpeed View Post
The limitations clearly aren't the intake, exhaust, and tuning. Next stop is hard parts - Cam and Heads.
Agreed 100%


Quote:
Originally Posted by DrSpeed View Post
You may find gains with a larger TB, but you may be trading HP/TQ at different parts of the powerband.
Personally, I don't think the gains will be that significant.


Quote:
Originally Posted by DrSpeed View Post
I am a pretty disappointed with the results of the Hemifever tune - but again, that's only one data point with your vehicle.
Correct, my results are from my vehicle and that's it. Everyone (people at the dyno and my friends) were looking forward to the Hemifever dyno and dragstrip runs but the gains were simply not there. I shared my dyno results with Hemifever but he kept questioning that something wasn't right with the dyno or the way the dyno was being run with his tunes. Honestly the people at Enhanced Performance ran the dyno the same no matter what tune was being used.

Hemifever felt his tunes would show their worth at the dragstrip with quicker elapsed times but we simply didn't see a huge or reasonable increase with performance. Again, you're correct when you said, there is only so much you're going to get out of the stk. engine with computer tuning.

Thanks
Michael Plummer
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Old 09-08-2016, 05:39 PM
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Re: HemiFever vs. DiabloSport tunes

Quote:
Originally Posted by thor363 View Post
AJ's tunes will always be the best in my book. That being said be patient with his response times when he's working late on the dyno.
Who's AJ?
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Old 09-08-2016, 06:02 PM
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Re: HemiFever vs. DiabloSport tunes

Quote:
Originally Posted by Michael Plummer View Post
Who's AJ?



AJ Berge
President
Hemituner Performance
100 Dale Street Westbabylon,NY11704
516-603-9276



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Old 09-09-2016, 09:48 AM
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Re: HemiFever vs. DiabloSport tunes

I believe it's AJ helping sponsor this also in Virginia.

2016 HEMItuner Performance MSHS @ ATCO | Modern Street HEMI Shootout
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Old 09-10-2016, 09:30 AM
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Re: HemiFever vs. DiabloSport tunes

Quote:
Originally Posted by Michael Plummer View Post
I tried a cat-back exhaust system from Corsa and saw no HP or TQ improvement. Plus, I hated the sound.....so I sold it.
damn was it that new one 14991? Cuz i just installed that and I get a hard on when I drive my jeep now.
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