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  1. #1
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    Default Still getting KR...

    How's it going,. Car is a 2000 GTP sedan with 150k. Mods are hot air intake, headers with catless down pipe. 180tstat, trans go shift kit and 3.5 mps and zzp canned tune. Autolite 104s. I'm scanning on an areoforce.
    At cruising speed and part throttle no KR but at work I'm seeing 3.5 to 6ish.
    I know a canned tune isn't the best way to go but in my area there isn't any good tunners that I know of and can't afford hp tuners at the moment.
    I just ordered a 3.6 pulley but also have a set of autolite 103s. Might try those until the 3.6 comes in.


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  2. #2
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    Default Re: Still getting KR...

    throw a wideband in to scan what your AFR is and see what it looks like regarding the zzp canned tune. that or the timing is too high. are the AL104s gapped at around 0.050-0.055? whats your elevation in NM?
    old setup-Z7 Turbo Kit w/T66, A2A I/C, stock cam & valvetrain/LS1 MAF/Ported 99TB/PowrTuner/AFC/Devils Own/LS1M Scanner/PRJ FP/42# Injs=12.3@118mph street tires -
    (Sold)BACK TO M90 Vs cam w/3.5" pulley/meth/25* timing+bolt-ons
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  3. #3
    GrandPrix Junkie SgtMarshal's Avatar
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    Default Re: Still getting KR...

    I wouldn't bother with the 103's, they are only necessary for builds with like 15 lbs of boost.

  4. #4
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    Default Re: Still getting KR...

    Quote Originally Posted by SgtMarshal View Post
    I wouldn't bother with the 103's, they are only necessary for builds with like 15 lbs of boost.
    Okay, thank you. I'll just wait for the 3.6pulley and see what she does.

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  5. #5
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    Default Re: Still getting KR...

    Quote Originally Posted by SgtMarshal View Post
    I wouldn't bother with the 103's, they are only necessary for builds with like 15 lbs of boost.
    Boost has nothing to do with it; it is just the setup in general.

    I ran 103's in everything. I don't care. Old motor; old tech. It works.

    However; canned tunes are USUALLY the issue. I'd check contact with the body, etc on your headers. I'd also put new mounts in it to eliminate any false KR possibilities. The 3.5" shouldn't be an issue though...then again every car is different and with them getting older and older the carbon build up is doing nothing but adding compression lol
    1999 Chevrolet Silverado K1500 Classic Z71 - Intake/Gibson Exhaust - The Daily
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  6. #6
    Donating Users coolone's Avatar
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    Default Re: Still getting KR...

    If you run the colder plugs you've got to shorten the gap!

    Just sayin...
    Overkill BBC Cam, YT 1.8 RR's, Rhodes Lifters, STGII Heads, GenV, Pacesetters, 3" Exh to Tips, TEP Trans. N*, ID 75# injectors/E85 coming soon

  7. #7
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    Default Re: Still getting KR...

    Quote Originally Posted by coolone View Post
    If you run the colder plugs you've got to shorten the gap!

    Just sayin...
    I have the 104s gapped at 55,. My dog bones bushings are shot so I ordered a set of bushing too.

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  8. #8
    GrandPrix Junkie SgtMarshal's Avatar
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    Default Re: Still getting KR...

    55 is a big gap, could close it down to something like 45

  9. #9
    Killa Bee Scottydoggs's Avatar
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    Default Re: Still getting KR...

    try the 104's at 0.50, where i run mine. you can try 48, 52 as well. sometimes you can feel a difference one way or another.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW

  10. #10
    GXP Level Member GTPpower's Avatar
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    Default Re: Still getting KR...

    Your plugs are fine. They aren't going to make a significant difference either way.

    Your problem is the tune and too small of pulley for your mods. Most of the canned tunes advance timing too much. Plus, the mods you have aren't really affecting anything.

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  11. #11
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    Default Re: Still getting KR...

    Quote Originally Posted by fst View Post
    throw a wideband in to scan what your AFR is and see what it looks like regarding the zzp canned tune. that or the timing is too high. are the AL104s gapped at around 0.050-0.055? whats your elevation in NM?
    Elevation is roughly 3600ft and gapped at
    .055

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  12. #12
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    Default Re: Still getting KR...

    Try gapping them at 0.050
    old setup-Z7 Turbo Kit w/T66, A2A I/C, stock cam & valvetrain/LS1 MAF/Ported 99TB/PowrTuner/AFC/Devils Own/LS1M Scanner/PRJ FP/42# Injs=12.3@118mph street tires -
    (Sold)BACK TO M90 Vs cam w/3.5" pulley/meth/25* timing+bolt-ons
    01 Z28 A4 HP-self-tuned, LTs, FTRA 13.1@110

  13. #13
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    Default Re: Still getting KR...

    Quote Originally Posted by 2000GTP243 View Post
    I have the 104s gapped at 55,. My dog bones bushings are shot so I ordered a set of bushing too.

    Sent from my E6810 using Tapatalk
    Dog bones won't matter that much.

    Now if your lower mounts are shot along with the DB's there is always the possibility of false KR.

    HOWEVER; still is probably the garbage tune.
    1999 Chevrolet Silverado K1500 Classic Z71 - Intake/Gibson Exhaust - The Daily
    2004 Chevrolet Corvette MRM A4 - AFE S2 Intake/TSP Catless LT's/3" ORX/C6 ZR1 Wheels/Exhaust Tips
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  14. #14
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    Default Re: Still getting KR...

    if you know how the zzp tune is setup and if the IAT is setup to add/subtract timing could put the correct diode resistor in the IAT connector to pull timing and scan again.
    old setup-Z7 Turbo Kit w/T66, A2A I/C, stock cam & valvetrain/LS1 MAF/Ported 99TB/PowrTuner/AFC/Devils Own/LS1M Scanner/PRJ FP/42# Injs=12.3@118mph street tires -
    (Sold)BACK TO M90 Vs cam w/3.5" pulley/meth/25* timing+bolt-ons
    01 Z28 A4 HP-self-tuned, LTs, FTRA 13.1@110

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