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Thread: any 5.3 tunes?

  1. #11
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    My PE delay is 0seconds.

    On B3609 the whole table is set at zero. Where should it be?

    I have lowered my tps enable about 10-20%.

  2. #12
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    i set my pe enable at 50% tps and the 3618 table to .85
    should i change the timing tables and 5908?or leave the high octane/low octane and 5908 alone

  3. #13
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    I raised my high octane table. The way I get it is you are suposed to ramp up timing to around peak torque(5.3 ~4000rpm) then when you get there drop the timing 3-4 degrees then after peak torque return to a maximum of 24-28 degrees.

    When I have my high octane table at around 22-23 peak timing it always seems to run at 24-29 degrees no matter what with all the adders added in.

  4. #14
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    Quote Originally Posted by dynarex
    i set my pe enable at 50% tps and the 3618 table to .85
    should i change the timing tables and 5908?or leave the high octane/low octane and 5908 alone
    Without a dyno you should do a couple of things to start.

    1: get a wide band O2 and install it.
    2: Learn to use the scaning tool

    If you want to mess with timing set up a set of PIDs to log all the timing stuff including knock retard and throttle position. After you have some baseline advance the areas of timing you think need it a few degrees at a time and scan again. If you hit knock retard or if you hear knock you've gone too far. Just go slow, gas cars are a lot more likely to break than diesels if you push too hard.

    Ira

  5. #15
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    thanks for all the help guys
    im sure ill be back soon!!!

  6. #16
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    If your seeing random KR like 4-6 degrees for no reason, Tordne said to zero out the Burst Knock Retard tables.

    I was seeing the random 4-5 degrees of timing being pulled in the middle of 2nd at WOT. I could not figure it out and thought it was becuase I had a 2000pcm or the sensitivities where wrong so I messed with them.

    But zero out the Burst Knock Retard tables. It fixed my random knock retard.
    It is supposed to pull timing becuase of large changes in cylinder pressures too prevent knock from even happening. If your seeing that random knock try it it worked for me. Its wierd that this was made to stop knock but really starts it.

  7. #17
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    Quote Originally Posted by dc_justin
    Well, you'll want to remove the delays in the tune (B3608, B3609, B3610).
    By default, PE isn't enabled until you're above 90% throttle. I'd lower that quite a bit to get into PE a bit sooner.
    B3618 is usually a bit rich from the factor for a naturally aspirated vehicle. You'll want to target something in the 12.5 - 13:1 range rather than the default 11.x:1 at WOT.
    When PE activates, it not only will richen the mixture up to the values in B3618, but it will also increase timing as specified in table B5908.

    I am looking at my b3618 chart and cant figure out what .87 at 0 means I think I seen where there was a conversion to air fuel ratio but cant seem to find where I seen it. can some one post the equation ?
    also I changed b3610 from 5000 down to 3000. is that enough or should i go lower?

    this gets addictive. trying to learn on my avalanch before i try getting my futral tuned T/A to idle right

  8. #18
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    also keep in mind ,i am towing a 6700 lb camper and dont want to mess up anything while towing. thanks

  9. #19
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    Quote Originally Posted by Aint Skeered
    I am looking at my b3618 chart and cant figure out what .87 at 0 means I think I seen where there was a conversion to air fuel ratio but cant seem to find where I seen it. can some one post the equation ?
    also I changed b3610 from 5000 down to 3000. is that enough or should i go lower?

    this gets addictive. trying to learn on my avalanch before i try getting my futral tuned T/A to idle right
    Post an image of your B3618...

    see post #1 or #2 of this thread: showthread.php?t=3064

  10. #20
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    I am trying to figure all that out. I will post it when i do
    2000 NBM trans am.
    427 Dart ship block,Lme ported Ls7 heads 12.5 compression
    246/262 .730/.712 112+4 low lash solid roller
    Rmvb 4l80 with transbrake, 8" FTI converter
    12 bolt Moser rear end with 4.10 gears

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