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So after playing with EFI Live for a bit I've made some pretty decent progress. While I did write a big race tune, I also made some lesser HP tow safe tunes that should really do well. The Performance-tow tune shown below actually has VERY little added fuel in it while the economy-tow has even less yet. These aren't going to win any performance awards, BUT we need to stay below the 700 lb/ft mark for the stock transmission. You'll notice that both tunes finish harder than the stock tune which rolls off hard as RPM's climb. This should help nicely against those pesky stoplight racers etc...
http://www.kennedydiesel.com/photoga..._Tow_Tunes.jpg
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Here's the race tune in it's present form. I'm still honing it, but it works quite well so far:
http://www.kennedydiesel.com/photoga..._Race_Tune.jpg
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Sweet tunes. Is that w/just the efilive or w/ any other mods (boost stick, intake, etc....)
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Otherwise stock except for the EFI Live/KD exhaust.
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I wondered how long it would take you. I'm impressed. I thought of downloading the software, but not really knowing what needed changing where and what its affect might be until it was tried, stopped me. I don't have a dyno like you do. So is the idea to burn these to a CD and sell to those with a lap top, or are you going to offer a download to a scan2. What are your thoughts. I know not everyone has a lap top with the proper connections, let alone a scan2. An enterprising guy like yourself might just offer a complete package with downloads from your web site as you tweek and store the programs and let us try and see what feels the best for our particular situation. I would think one would want with stock trans, a tow program, an running empty ultra fuel mileage, and a performance for saturday night drags. With a stage 5 SC who knows what one might want? I see a lot potential. If I wans't so busy....Am I thinking on the right track here?
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At this point in time I'll be doing exchange ECM's. They will be switchable bewteen A and B tunes. This is the only way to keep the tunes proprietary for now.
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I am very happy with John's tune on the LLY. Runs very strong and I am hoping for a great showing at the Suncoast dyno event.
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Be sure to take your laptop with you. I'll be on the dyno Friday and may have something worth trying...
ALMOST makes the LLY drive like the LB7 doesn't it?
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I sure get that nitrous like smile when that 1000 foot pounds of torque ramps in.....
It made driving home in the rain the other day very entertaining. I really had to resist the urge to do some donuts with it like some silly high school kid... :D
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John is this the same tune you had when Aaron and I rode in your truck?
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No, that one was quite a bit less power than this one....
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John:
I was reading on the other place that a certain person is concerned and is stirring up quite a todo about the dowel pins in the crank pulley stub and the cam drive pulley stubs. Do you have any concerns about your high horsepower and torque production in regards to these pins shearing or near shear off causeing a shift in cam timeing or a catostrophic failure or is this a cry of wolf?
Denny
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I've sheared the cam dowls in big HP gas engines and now double dowl them, but I don't think these low rpm engines need'em. I've never heard of anyone twisting a gear off in a duramax so I'm calling it a wolf cry.
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I think that it could well be very serious issue/defect in our engines, but how many will actually fail remains to be seen. Probably very few. I won't lose sleep over it, but it is a concern and something I would definitely address if I were in a teardown situation.
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upon further investagation into the concern I must say I was amazed at what I saw. I've never seen one that jacked up. I think a better fix would be to add a second dowl. I don't like keys. I wouldn't tear an engine down to check it out but if I had it out already..... I know when these fail in gas engines they make a serious mess.
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Thanks Guy,
The LLY finally runs and responds like a Hot Juiced LB7 only less smoke and even a bit more responsive with a earlier TQ peak.
The real beauty is that you can hardly tell the difference between the Race tune and the lesser units until you really call for the power. We'll be getting the switchable setup to Brandon soon although from the sound of it, He/Dayle will seldom use anything but the high HP tune.
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I currently have about 400 miles of windshield time running JK
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We put Brandon er uh Dayle up at 471RWHP at Suncoast this past weekend with this tune! Not bad, beat the heck out of everything but the big mod stuff!
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When are you going to run it at the track?