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Hemifevertuning.com using Diablosport Trinity

47K views 198 replies 55 participants last post by  Boer 
#1 ·
Oh my god, is all I can say. I was fairly happy with my 87 tune I installed using my Diablosport Trinity, but then I found out about a company called hemifevertuning.com and how Sean Powell provides a custom tune utilizing your Trinity or Intune. He offers either an 89 or 93 tune.

I installed the 89 tune and it's night and day when comparing the stock Diable 87 performance tune to Hemifever's 89 tune. The most noticeable difference is that Sean actually reprograms the TCM. Now I have zero hesitation when stepping on the gas. He'll also have you send a data log so he can makes final tweeks to the tune to get the optimum performance out of it and yes, he adjusts for those that have bolt on's such as my Mopar CAI!

The great news, is that this only cost $125 if you want to download it to your Diablosport Tuner or if you don't have one, he is a Diablo Dealer and offers a discount with his tunes already installed. It's the best $125 I have spent!
 
#2 ·
I've only heard very positive reviews on his tunes. If you buy the Trinity form him, his custom tunes are free! I don't know why one would buy from anywhere else...I hope to get one for my Ram within a year.
 
#3 ·
I already had my Trinity that I used on my 05 5.7 GC, so it was money well spent. It is night and day compared to the canned tune you get from Diablo. Throttle response is greatly improved and shifts are snappy and quick. You can't beat his customer service either. It's a no-brainer.
 
#4 ·
hmmm...very tempting and although this read like an ad, i've heard and seen nothing but good things. I may bite the bullet on this although i'm not satisfied with the shortcomings/bugs of the intune itself.
 
#6 ·
That's the biggest complement you can pay. All that is advertised on his website is the truth. I had the regular Diablo 87 performance tune installed and had it for about 3 months and I can tell you it is night and day with his tune. What's also great is that he wants you to send him the data log and he will tweak the tune specific to your vehicle.
 
#7 ·
Same experience here with my local NYC tuner. The canned tunes are great but the custom tune is where the hemi really shines. No lag, snappy and quicker shifts and overall a great driving experience. A custom tune should be on everyones list of mandatory mods. I picked up 60bhp with custom tune, CAI ported 85mm TB and corsa catback.
 
#10 ·
As long as the trinity is not married to another vehicle yet you can. You tune the vehicle with one of the Diablo Tunes, either 87 or 93 octane and email Sean both the original factory tune and the diablo tune for your vehicle. He then sends back a tune via email and you download it to your trinity then to you jeep. It's not hard to do at all.
 
#14 ·
Ordered the intune dcx from hemifevertuning. Sean is shipping it out today and already sent me basic instructions to send him my info for him to tune once i've installed the stock tunes.

He did mention thathe recommends to switch to a 180 degree tstat, anyone else done this?
 
#16 · (Edited)
This information gets me interested in a tuner but I'm confused about MPG. I'm already suffering here in So Cal with lame city driving MGP, and while I don't expect MPG gains, I don't want to lose any more. Installed the Hypertech harness and pleased with throttle response and MPG doesn't seem affected. Never understood how improved perfomance with a tuner could come with better MPG as some advertise, and recently saw someone on the forum selling their Intune because of the significant decrease in MGP. Anyone offer any thoughts on how much MPG you can expect to lose, or is there actually a way to get better MPG and power? Seems counterintuitive. Thx.
 
#17 ·
My personal experience was that the diablo tune canned 87 tune actually reduced my MPG's by 2. I was not happy. As it turned out when I used my 89 tune from hemifevertuning.com they went back to factory results but with incredible improvements in shifting and all around power vs the diablo tune.
 
#18 ·
Here's my 0.02. The custom tune is not what hurts your mpg. The car shifts better, doesn't struggle looking for gears and the throttle response is greatly improved. Now, with all that said.......stepping on the pedal a bit more BECAUSE of the tune is what gets you in trouble and lowers mpg. I have a custom tune and I fill up once a week. I do 90% city driving during my work week. I'm happy with that.
 
#21 ·
This makes sense to me. I've had to go WOT on occassion just to get the power I need...I am sure that takes quite a bit more gas than if the tranny held gears a bit longer.

I am mainly looking for the improved throttle response and shifts, if there are increases in power, cool. I find that the Hemi puts out enough power, it's just not used nearly as effectively as it could be.

The one question I do have...does the tuning have the same impact in all of the selec-terrain settings? I drive around quite a bit in "sport" and am wondering if I will see the same improvements in that setting as "auto"...anyone have an answer?
 
#29 ·
I love the sport mode setting where the front end lowers a bit and 30/70 ratio or something like that for the back axle. Ideally what I would want and once I get my exhaust and CAI installed i'm going to send my log to diablo and Request if I could have different settings ( sports mode aggressive sports shifting and more horespower, and then in auto mode MPG fuel saver.) Don't get me wrong diablo trinity get more out of the hemi. But with a little bit of programming from the diablo boys, i'm sure we could unleash a real beast or a decent fuel economy ride.
 
#30 · (Edited)
Well my intune-dcx is in. I plan to load the diablo tunes later then pull the logs and send to Sean at hemifever. Ive gotta take the Jeep in tomorrow to have them look at replacing one of my side views, and will be reverting to stock after work tonight. Will probably take it for a spin after work to see how the diablo 87 octane tune feels (have a full tank of 87).

Update: Loaded the 87 tune and drove around a bit and left it in auto. It definitely drove far better than stock and there was no longer that annoying upshift that killed power when taking turns. I can't say I noticed any improvement in power but I figured this would be the case with the 87 tune. The driveability is definitely improved but it still suffers from a very delayed downshift when you are trying to get on it...it's abrupt and you never know when it's going to happen. Looking forward to what Sean can do.

Also, his tunes are not already on the tuner, unless it's different for the Trinity. He sent me a standard intune dcx and asked that I load one of the Diablo tunes. I then send him the last tune written and he will then modify the tune to get me the most out of it.
 
#32 ·
Add me to the list of very satisfied Hemifever Tuning customers. I loaded Sean's 89 tune last night, and holy crap what a difference it made. I was previously running Diablo's canned 91 tune. I won't re-hash what others have already said, so in short: get a custom tune. Whether it's Sean's, Johan's, your local speed shop´s, etc. As long as they know what they're doing you'll find that it is money very well spent.

Sent from my Galaxy S3 using Tapatalk 2
 
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#38 ·
The tune only works in Auto. Switch it to sport mode, and it will revert to the factory Sport mode settings.
 
#39 ·
This is not true. The differential setting,s % of front and rear remain as factory settings, but the Jeep keeps it's tune and crisper shift points. Snow does still start in second....I tried it this am. The Select Terrain is not touched by the tune, only the transmission and engine performance. Sport still lowers the vehicle and turns off traction control.
 
#44 ·
Damn, I've been all excited about the new tuning developments so this news of the custom tunes not working on the 11's feels like a kick in the junk...

Hopefully they sort it out soon but if not I wonder if you can run an 2012 PCM in an 11 as a workaround?
 
#45 ·
^I hear you 604. Sean at Hemifever said that Diablo was working on the '11 glitch preventing custom tunes to be loaded, and to keep checking in with him/them. Interesting idea on using the workaround with a '12 PCM, what do they go for?
 
#46 ·
I'm guessing they aren't cheap from the stealer but if you could track down a used one might not be too bad. Nothing on eBay atm...

If Diablo is working on the issue then I will prob hold off for now but if that doesn't pan out at least it may be an option.
 
#47 ·
As of noon today, DS sales is saying they support the 11's and to contact Hemifevever for a custom tune. Dubious.

Still a bit of a cluster on the 11's. I will keep pressing, suggest others do the same, please and thanks.
 
#48 ·
As of this AM, Sean is still pressing and feels they are getting closer with DS on determining the glitch preventing custom tunes to be loaded on the 2011. Thanks to JG member's feedback and Sean's continued responsiveness, I will buy a Trinity with Hemifever tune as soon as it is ready.
 
#49 ·
Thanks for keeping us informed. My 11 is going to wait until they get this ironed out before I buy a custom tune and DS tuner as well. I hope it's soon!

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