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  1. Thread: MPG log

    by Obsolete489
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    2,880

    Can you take a screenshot of your math expression...

    Can you take a screenshot of your math expression so I can compare?
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    Your injector harness should be fine, just might...

    Your injector harness should be fine, just might have to lengthen one side of it. You'll need new fuel rails, and some lines. Honestly I'd ditch the factory FPR at this point too.
  3. Little late to be updating this, but to anyone...

    Little late to be updating this, but to anyone curious the mark VIII fan will not keep up with any sort of load on my truck. Highway cruising was fine, seemed to keep cool at idle and low speed, but...
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    Looks like i missed that there were more posts...

    Looks like i missed that there were more posts here.. I thought i had this pretty well sorted, then switched to straight 91 from e85 since gas is so cheap.. and back to playing with it. Also going...
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    Here is what I'm at currently. Still testing the...

    Here is what I'm at currently. Still testing the 1600 rpm range, not as often i see high airmass there. It'll still kick some kr occasionally but it is much improved. Please not I've only been...
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    I'll try running in that area and see what...

    I'll try running in that area and see what happens, and report back. Hopefully this takes care of the 1600 rpm range, down in the 1400-1500 range I pretty well eliminated kr and it really made a...
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    What cyl airmass are you commanding that at? It...

    What cyl airmass are you commanding that at? It is usually .5-.6 that I'm seeing issues. Perhaps i need to jump more in those areas? Or maybe I am just letting this thing hold its gear too long and...
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    This seems to be working for me as well. I...

    This seems to be working for me as well. I haven't gotten everything to go away yet (1500-1600 rpm is being a bitch), but I'm seeing improvements. I'm taking increases slow, a few percent at a time.
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    It really doesn't seem to be an issue, but I'd...

    It really doesn't seem to be an issue, but I'd still like to get rid of it if I can. If I figure out anything with SOI I'll post back.
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    I desensitized the knock sensors some in the low...

    I desensitized the knock sensors some in the low rpms areas, this reduced kr but it's still present. What's annoying is when it does throw a bunch of kr it knocks me into single digit timing, even on...
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    So you limited the allowable knock retard?

    So you limited the allowable knock retard?
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    That sounds about perfect. Thanks

    That sounds about perfect. Thanks
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    I am curious, how do you like the exhaust? Been...

    I am curious, how do you like the exhaust? Been thinking about upgrading on my truck but damn those borla systems are expensive.
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    I originally cobbled this together using both a...

    I originally cobbled this together using both a 5.7 and 8.1 tune and tuned it for my personal truck, then refined it from there for the guy that i was helping. If you're needing help PM me your email...
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    Hell yeah, and no worries on the response timing....

    Hell yeah, and no worries on the response timing. I manually subscribe with emails for all threads i want to follow ha
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    I'd certainly take a file if you wouldn't mind....

    I'd certainly take a file if you wouldn't mind. [email protected]
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    I'm glad that it's going better now lol

    I'm glad that it's going better now lol
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    I see a lot more of my KR from 1300 to 1600,...

    I see a lot more of my KR from 1300 to 1600, occasionally I'll see it higher up but for the most part that's where i see it. It makes sense that high load and low rpm can cause some knock but it...
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    So anymore thoughts on what to run with? Run with...

    So anymore thoughts on what to run with? Run with lt1 values? Something in between stock and LT1?
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    I saw it in both.

    I saw it in both.
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    I also see kr in these areas, I'm very close to...

    I also see kr in these areas, I'm very close to stock timing running E85 and it still shows up.
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    I have no help to offer here.. but i have a...

    I have no help to offer here.. but i have a friend with an 08 titan that want's a tune so I thought i'd check into using my hp tuners instead of him pay $600 for a mail order tune or whatever it...
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    Ha I bet a TOW is a little more involved....

    Ha I bet a TOW is a little more involved. Googling the custom os change would be your best bet, it's an option in the OS tab. Screen shots or a video are much better at explaining it, but it makes...
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    That would be an awesome birthday present lol I...

    That would be an awesome birthday present lol I have one nearby that I keep telling myself I'm going to schedule some time on if/when i get my pickup to a point that I'm going to leave it alone for...
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    Yeah I'm not saying its anywhere near ideal not...

    Yeah I'm not saying its anywhere near ideal not knowing if the fueling is on point, nor would i be doing a bunch of WOT pulls, but it's probably fairly safe. If you do ever get yours on a dyno, I'd...
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