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  #145  
Old 10-11-2013, 06:52 PM
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Re: Hemifevertuning.com using Diablosport Trinity

do these tunes only work in auto or do they also carry over to sport setting on the select terrain 2012 gc 5.7?
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  #146  
Old 10-11-2013, 09:08 PM
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My 0-60 times were just about the same for normal and sport settings.
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  #147  
Old 10-12-2013, 07:44 AM
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Re: Hemifevertuning.com using Diablosport Trinity

just wondering b/c i read in previous posts its only available in auto, that would have sucked. mine is never in auto unless im in the starbucks parking lot. i wish it would start in sport and i could select from there.
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  #148  
Old 10-12-2013, 08:43 AM
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Re: Hemifevertuning.com using Diablosport Trinity

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Originally Posted by citiscene View Post
just wondering b/c i read in previous posts its only available in auto, that would have sucked. mine is never in auto unless im in the starbucks parking lot. i wish it would start in sport and i could select from there.
The hemifever tune on my 2013 still works in sport mode. The shift points feel a bit different, and it kicks down a little earlier, but overall, the engine and trans respond so well in auto, that sport is not as much of an improvement as it is when stock.
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  #149  
Old 10-18-2013, 08:20 PM
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Re: Hemifevertuning.com using Diablosport Trinity

What kind of before and after numbers have you guys seen with the tune?
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  #150  
Old 10-18-2013, 10:27 PM
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No one's dyno'd far as I know
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Old 10-18-2013, 10:32 PM
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Re: Hemifevertuning.com using Diablosport Trinity

What about 0-60 or 1/4?
How are the shifts? This is my wife's primary car and dont want it too firm except when getting on it.
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  #152  
Old 10-18-2013, 10:43 PM
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I can tell you that I gained 1/2 second on my 0-60 time after installing the basic Hemifever 91 octane tune.
I still have to log some data and send it to Sean, so that he can get me a custom tune, which will also take advantage of my CAI, ported throttle body and catch can. I'm hoping for another 1/2 second...but I won't hold my breath...
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Old 10-19-2013, 02:23 AM
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Re: Hemifevertuning.com using Diablosport Trinity

Nice. Thanks
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  #154  
Old 10-19-2013, 04:43 PM
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Re: Hemifevertuning.com using Diablosport Trinity

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Originally Posted by Prestone View Post
No one's dyno'd far as I know
Yeah - it's difficult to find 4 wheel dyno's, at least around here, and I'm betting that most JGC's are 4WD.

Rob
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  #155  
Old 10-21-2013, 08:01 PM
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Ok Today I did a 0-60 of 6.95. This was down from the original times of around 8.3. The improvements are a result of Volant CAI, 85mm ported throttle body, and a basic 91 octane tune on the Diablosport Trinity from Hemifever. I just got data logging set up and will gather the data Sean requested, send it back to him for his custom tune. So far so good....My Grand Cherokee has gone from being a total slug to something approaching quick. The biggest gains are the responsiveness...especially while rolling. This 2-1/2 ton beast is slow to get moving, but after inertia is dealt with...it really does OK......I'd like to know what an exhaust system would do. Any of you guys who changed to a Magnaflow, Corsa, Borla etc... I'd really like to know what it did for your performance
What I want...what I really want is one of those SRTs! ...patience....patience....I think I'm coveting my neighbor's goods (Scott)
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  #156  
Old 10-22-2013, 06:33 AM
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Re: Hemifevertuning.com using Diablosport Trinity

Wow what a difference with the V8. I have the V6 and collecting data before and after the installing the 91 octane tune. With the V6 I had with the original settings a 0-60 in 10.7 seconds. With the Diablo Trinity 91 octane tune it improved to 9.5 seconds. My torque improved a lot, by about 40 foot pounds, but did not make a difference in horsepower, I even think the hp went down a bit. The good news, my gas consumption stayed pretty much the same at around 23 mpg in city driving and 25 on the highway. The main improvement is the low end power and no need to rev the hell out of the engine.
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