Thread: Knocking when it shouldn't

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  1. #1 Knocking when it shouldn't 
    GT Level Member Dadkota's Avatar
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    Hey guys,

    I have an '01 GTP with a few mods. PLog to 3" DP to 3" catback, intake, ZZP 1.0 PCM, 3.5 pulley, poly mounts, 104 plugs and 180 t-stat.

    First gear pull today with newly installed Aeroforce gave me shocking results. 3.5* KR and 1.5 LT at WOT shift point. I was sure these supporting mods would have been good for the 3.5 pulley but apparently I was wrong lol

    Anyone have any insight on why? I don't know much about tuning KR fuel trims but I figured I would start here by recommendation from other 3800 people.
    '01 GP GTP- Intake, Plog, 3" DP and Exhaust, DHP tuned by me, GMPP sway bars, 3.5 MPS, cold plugs and tstat
    -180,000 miles and climbing
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  2. #2 Re: Knocking when it shouldn't 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    Aslong as the fuel trims are within 5% of zero, they are fine. So thats not even something I'd be looking at here.

    I wonder how much timing advanced it's calling for, it might just be too much with a canned tune.

    Figure if it asking for 17-18, thats too much and it might like 14-15 better.

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  3. #3 Re: Knocking when it shouldn't 
    GT Level Member Dadkota's Avatar
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    Can I check for that on the Aeroforce? Ignition advance would it be?
    '01 GP GTP- Intake, Plog, 3" DP and Exhaust, DHP tuned by me, GMPP sway bars, 3.5 MPS, cold plugs and tstat
    -180,000 miles and climbing
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  4. #4 Re: Knocking when it shouldn't 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    Yeah, you can.

    It might be hard to know what the real number is though. Because if it start to knock, it will pull timing out and thats the number you will see on the gauge. But you may be able to catch it at whatever number it is before it see's kr.


    Drive it around again and see if it knocks in 2nd gear or when you roll into it at 50-60mph or something.

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  5. #5 Re: Knocking when it shouldn't 
    GT Level Member Dadkota's Avatar
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    So it seems that my WOT timing is about 15.5* but HOLY FALSE KR. Spiking all over the place, hitting 7* then coming back down to about 2* then hitting 5* and coming down again. I don't think true KR is much higher than 2* or so near shift point
    '01 GP GTP- Intake, Plog, 3" DP and Exhaust, DHP tuned by me, GMPP sway bars, 3.5 MPS, cold plugs and tstat
    -180,000 miles and climbing
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  6. #6 Re: Knocking when it shouldn't 
    GXP Level Member GTPpower's Avatar
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    I'm betting your kr is real.

    Log your kr with timing.

    Sounds to me like you just need more mods.


    2001 GTP Drag Car - XPZ, Tischler heads, Upsidedown M90 IC'd, e85, Gen V, 2.3 w/ 5%OD
    2005 F350 6.0 - studded, deleted, tuned
    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
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  7. #7 Re: Knocking when it shouldn't 
    GT Level Member Dadkota's Avatar
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    Just for the 3.5 pulley!? On the tread about "safely modding 3800 cars" the only thing I don't have is a ported SC case and LIM. Do you think I just got a bad tune from ZZP?
    '01 GP GTP- Intake, Plog, 3" DP and Exhaust, DHP tuned by me, GMPP sway bars, 3.5 MPS, cold plugs and tstat
    -180,000 miles and climbing
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  8. #8 Re: Knocking when it shouldn't 
    Killa Bee Scottydoggs's Avatar
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    if you had a tuner, you could fix that kr. its not that the tune is bad, your engine just dont like it. why canned tunes are hit or miss.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  9. #9 Re: Knocking when it shouldn't 
    GT Level Member Dadkota's Avatar
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    Blah that's what I feared. So what are my options here?
    '01 GP GTP- Intake, Plog, 3" DP and Exhaust, DHP tuned by me, GMPP sway bars, 3.5 MPS, cold plugs and tstat
    -180,000 miles and climbing
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  10. #10 Re: Knocking when it shouldn't 
    Turbo is the way to go. REDCRAPGP's Avatar
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    Find someone who can give you a in car tune.. Not that generic mail order crap. It's a hit or miss.


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    Squirrels are my engine. I need a Ford Regal
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  11. #11 Re: Knocking when it shouldn't 
    GT Level Member Dadkota's Avatar
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    How much would that cost? I'm on a tight budget, college and **** lol
    '01 GP GTP- Intake, Plog, 3" DP and Exhaust, DHP tuned by me, GMPP sway bars, 3.5 MPS, cold plugs and tstat
    -180,000 miles and climbing
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  12. #12 Re: Knocking when it shouldn't 
    Killa Bee Scottydoggs's Avatar
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    depends on who your working with. some may want 50 others may want 100. you need to find someone first.

    i got a tuner, not sure if you want to drive to NJ tho.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  13. #13 Re: Knocking when it shouldn't 
    GT Level Member Dadkota's Avatar
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    NJ is like 5.5 hours away lol I can afford $50-$100, not as bad as I thought. I'm gonna see if there is anyone in New England but if it comes to it... I might be driving down to NJ hahaha I appreciate the offer btw
    '01 GP GTP- Intake, Plog, 3" DP and Exhaust, DHP tuned by me, GMPP sway bars, 3.5 MPS, cold plugs and tstat
    -180,000 miles and climbing
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  14. #14 Re: Knocking when it shouldn't 
    Killa Bee Scottydoggs's Avatar
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    there used to be more active guys who tune up there. seem to be slimming out. best to start a thread in the ne region area looking for a tuner.


    i know NJ is a trip. but is closer to 3 hours. im at the top of NJ right over the GWB in hackensack. i know that makes it a shorter trip. lol not by much tho.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  15. #15 Re: Knocking when it shouldn't 
    GT Level Member Dadkota's Avatar
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    That actually isn't too bad, I have driven to Maryland before right through that area.

    I'm actually apart of a NE page with about 20k members lol not a Wbody specific page but there are some of our people on there haha
    '01 GP GTP- Intake, Plog, 3" DP and Exhaust, DHP tuned by me, GMPP sway bars, 3.5 MPS, cold plugs and tstat
    -180,000 miles and climbing
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  16. #16 Re: Knocking when it shouldn't 
    Killa Bee Scottydoggs's Avatar
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    that page sounds like the place to start then. if you find people with hp tuners that can be used, but you may need to pay to unlock your car, you need to buy credits per car its used on for hpt.

    dhp is free to use these days.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  17. #17 Re: Knocking when it shouldn't 
    GT Level Member Dadkota's Avatar
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    Thanks for the help man, I really appreciate it. Trying to get this motor to be a decent DD with some fun haha all I have left really is to install my 10mm wires, maybe a larger TB, and this tune lol
    '01 GP GTP- Intake, Plog, 3" DP and Exhaust, DHP tuned by me, GMPP sway bars, 3.5 MPS, cold plugs and tstat
    -180,000 miles and climbing
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  18. #18 Re: Knocking when it shouldn't 
    GXP Level Member GTPpower's Avatar
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    Put on a larger pulley, stay out of the throttle, or save up for an intercooler. You could tune it out with a tuner, but it's not going to make you much more power than going to a 3.6 or stock pulley.


    2001 GTP Drag Car - XPZ, Tischler heads, Upsidedown M90 IC'd, e85, Gen V, 2.3 w/ 5%OD
    2005 F350 6.0 - studded, deleted, tuned
    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
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  19. #19 Re: Knocking when it shouldn't 
    GT Level Member Dadkota's Avatar
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    I don't hammer on it very often, its my DD so its gotta last haha. I'm searching around now for people who can tune it out. I'm just curious on what you think it would make with power as it sits with 0KR?
    '01 GP GTP- Intake, Plog, 3" DP and Exhaust, DHP tuned by me, GMPP sway bars, 3.5 MPS, cold plugs and tstat
    -180,000 miles and climbing
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  20. #20 Re: Knocking when it shouldn't 
    GXP Level Member GTPpower's Avatar
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    Maybe 220-230 whp.


    2001 GTP Drag Car - XPZ, Tischler heads, Upsidedown M90 IC'd, e85, Gen V, 2.3 w/ 5%OD
    2005 F350 6.0 - studded, deleted, tuned
    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
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