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Discussion Starter #1
I posted this in the general section by accident but I wanted to post it here since I know a lot of us CTD folks only visit this part of the forum.....
Late last week I decided to take the plunge and purchase a tuner for my 2015 CTD. I did as much research as I thought possible and ruled the Trifecta Tune out bc of reports here of uneven throttle response and an overall uneven power delivery. My goal for car is not to try to make it a "race car" but to eliminate as much torque lag as possible while bumping up the hp/tq as much as possible while maintaining smoothness. So I thought I was going to go with Fleece Performance and decided to call and place an order. The first number I called, the toll free number listed on their website, rang once and played a disconnected message. The second number, their advertised local number, rang 8 times and then disconnected. I emailed them and got a response that said they had some event at their place of business so wouldn't be answering the phone for 5 days. Uhhhhhh, no thanks. I did some research on the Duramax Tuner and was encouraged by their dyno pulls and driving clips on their YouTube page. I called them and was politely told they licensed the rights and selling of their tune to KermaTDI. I have to hand it to Duramax Tuner though, they methodically answered all my questions about the tune they came up with, even if they no longer sold it since they wanted to focus 100% on the Duramax truck market.

Ok, so I ordered the Kermatdi Tuner last Friday and got it the next Monday. It's truly plug and play. You turn the starter to accessory mode, plug it in, flash and license the stock software (3-4 minutes), turn the starter off when prompted and then repeat that process with one of the three available tunes - economy (20hp), sport-econ (35hp), and race mode (50 hp). I started with race mode. Wow. Plant the throttle from a stop and you'll spin the wheels through most of 1st gear. DEFINITELY a huge power jump but a touch too jumpy for everyday driving. I then tried sport-econ mode which gives you almost every bit of that power (from my butt dyno at least) with a huge smoothing of the throttle. The best way I can describe it would be the turbo lag when stock was a full "one-one thousand" second and this mode drops part to barely the "one.." part. Midrange is bumped up and the car surges forward hard from about 1300rpms to 3k rpms. It's totally awesome.

As a totally unscientific experiment I wanted to measure fuel economy in sport-Econ mode so I got on I-40 with no traffic and set the cruise at 65mph the immediately reset the trip meter and mpg gauges. This is the result..... IMG_0228.jpg

All in all, I'm totally pleased! Definitely worth the $600 with free shipping. I'll have more updates as time goes by and will be comparing the different tunes on a dyno locally in a week or so after my July 4th vacation.​


 

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Discussion Starter #3
I'm not sure.... I just cut and pasted from the General Forum; not sure why some of the random words are hyperlinking....
 

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Discussion Starter #5
Yeah, I noticed that too. Tomorrow when I do some testing of the Econ mode on a road trip I'll take a pic of the different mode screens. Here's a pic of the tuner itself. ImageUploadedByAutoGuide1435776793.041094.jpg
 

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Keep us posted on mpg
 

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Good to hear you're liking it. Sounds like things are finally picking up on the diesel tuning side.
 

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Ok, a few new thoughts after a week of driving with it and a 700 mile road trip:

1) I've pretty much settled on the "sport Econ" (middle) tune. The Mild Econ mode is very very close to stock and the full Sport mode is too touchy in everyday driving (requires concentration not to surge away from a red light). I did the first half of my way to Tennessee in full Econ mode and didn't notice any better or worse fuel mileage on the interstate than my preferred sport-Econ mode.

2) This car hates stop and go traffic, I think even more so with the tune. It seems that the car upshifts asap in gentle stop and go city driving and will lurch when you accelerate bc of a downshift. I think this is the case stock but the tune seems to highlight.

3) I haven't had the time or patience to do controlled steady cruising on the exact same roads in each tuning mode but, to me, I can say the tune MAY help mileage in the Econ and Sport Econ mode but definitely does NOT HURT it. This pic is earlier this evening cruise control on I-40 with the cruise set on 70mph for the 19 miles indicated. I coasted to a stop the last .2 mile on the off ramp. The elevation was mostly level with subtle hills up/down. I'm quite satisfied as anything over 50mpg highway cruising far exceeds what I expected.
ImageUploadedByAutoGuide1436318692.196917.jpg
 

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I'm looking into investing in a tuner, so what you are saying is out of the three companies the karma is the best with your daily driver. I drive 60 highway miles total a day to work doing 75mph posted. 30/30. And I hate the turbo lag. I am worried about this regeneration think that will happen. Would I get this problem if I have it set to the sport race mode.
 
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