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Thread: Jeep WK 5.7 Hemi 2005 NGC3 268Compcam + K&N Tune

  1. #1
    Tuner in Training
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    Jeep WK 5.7 Hemi 2005 NGC3 268Compcam + K&N Tune

    Hi!
    I've rebuilt my Jeep heads with new springs, polished intake, exhaust. Added 268H-13 Comp Cam, and K&N CAI.
    I've uploaded stock tune, and started to make some modifications, but for sure nothing spectacular effects yet.

    If someone could lead me to proper path.
    I've changed part Throttle advance - partial +2
    WOT +3 below 1152RPM, and +0,5 after.
    TQ Management - Shift TqRed Time = 0.

    VCM Scanner - readings from my PCM are really pain in the ass. Refreshing time is about 5 sec. No Knock sensor readings. :/

    FA stoich ratio is set to 14.4:1 (0,0694) by factory. It's kind to much for me. Also Enrichment map starts from 0,08 (0,0694+0,0106) to 0,088 what is equal to 11:34:1.
    What you suggest to focus on?

    oryginaly.hpt
    4 - WOT.hpt
    4 - WOT.hpl
    Last edited by Pablito[PL]; 12-10-2018 at 01:47 AM.

  2. #2
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    So i've made a next step.
    After little spark advance adjustment i 4 - WOT.hpt. I've started with VE adjustment. During the readings STFT average was aroung 5% so even without tuning was almost perfect. Of course, MDS, and all suppoted corrections were disabled.
    Now i have adjusted VE map by approx 2%.

    5 - VE means after adjustments.
    If i got such low short trims, should i continue with spark advance?

  3. #3
    looks nearly same as mine

  4. #4
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    Quote Originally Posted by benjohns View Post
    looks nearly same as mine
    I've made a step back, and now i'm testing map below.
    Stoich has been changed to 0,068 (14.7), and WOT enrichment until 4160 rpm is 0,012, what should gave me 12,5:1.
    Past this rpm fluently rising to 0,017, whats giving me 11,7:1. In this area of high rpm i'm affraid of slow flame propagation accordingly to high spark advance, so i've made it a little richer.
    If i'm doing something wrong, please let me know.

    5 - WOT 1 - zmieniony stoich (nie testowany)-.hpt

  5. #5
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    Can someone please explain me, why does my 2005 NGC3 has so slow data readings?

    5 - WOT - zmieniony stoich testowany.hpl
    Last edited by Pablito[PL]; 01-03-2019 at 04:54 PM.

  6. #6
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    Progress

    i've made a little progress.
    Changed Power enrichment in WOT to 12:3 in whole area (for tests).
    Finally i have reached 14.6s on quarter mile.
    Have problems with start beacuse of slippy road (wet).
    Maybe in dry conditions results could drop to 14.3-14.4.

    Finnaly made a progress. It seems that AFR was to rich before.

    6 - testy - obroty i power enrichment 3.hpt

  7. #7
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    Progress

    Hello,
    Nobody's talking about MBT table, so i will.
    It is essential to raise MBT spark values in particle cells that we are considering to change in WOT table.
    Otherwise we will change WOT spark with no effect.
    If we pass last rpm column in PE, PCM start to overrich fuel, so i've decided to set max PE to 0,0869 (11,5AFR) from stock value 0,103 (9,7AFR).

    I've also improved VE tables. Now LTFT stays below +/-5%.

    ostatni wgrany 20190330 15test10.hpt
    Last edited by Pablito[PL]; 03-31-2019 at 05:58 AM.