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Valvetrain noise after cam swap

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  • Originally posted by gectek View Post
    can you pm me the file or email it to me. im interested to see what you came up with.
    this is the bin ive been working with. i still need to figure out exactly what's causing the high positive LTFT fuel trims.

    theres a bin and a quick scan from the same day. ive got a few, well 3 to be exact scans that are about 30 minutes long ill add up later gotta pull them off the laptop.


    im getting no KR at all so its good in that area. still getting some hesistation on accel.

    crusing the LTFT's are in the range of 15ish area but when i hit the gas they either zero out or go ever so slightly negative.

    heres the 3 scans i was talking about. scan depot has a 1meg limit and they kinda come in over that.






    there kinda long mainly because i forgot they were still logging
    Last edited by geldartb; 07-07-2009, 05:17 PM.
    sigpic
    99 Grand Am GT
    3400/3500 -Solid trans mount--TCE 65mm T-body---85mm LS2 maf---1 1/4' TCE intake spacers with 3400 upper--SLP Catback with flowmaster 80--TOG headers
    Modded 3400 lifters with LT1 springs---Comp Cams 26986 Springs
    1357 cam 227 233 .050 dur
    515 515 lift 112 lsa
    15.232@88.85mph on stock 3400---New time to come


    Comment


    • Thats odd... What is your IFR set for and what injectors are you running? Fuel pressure?

      My setup actually shows neg numbers with stock 3500 VE tables... I've just finished doing my VE and now I'm on to my MAF tune.

      I think my injectors are flowing more than what I have my IFR set at so thats why I get neg numbers, You may be flowing less than what your IFR is set for.

      Got Lope?
      3500 Build, Comp XFI Cam 218/230 .050 dur .570/.568 lift 113LSA
      Fully Balanced, Ported, 3 Angle Valve Job, 65mm TCE TB, S&S Headers.
      Stage-1 Raybestos/Alto 4t60e-HD, EP LSD, 3.69FDR
      12.61@105 Epping NH Oct 2015 Nitrous 100shot (melted plugs) 13.58@98.8 N/A 3200LBS

      Comment


      • IFR is 280
        28 lb fattie style 3800 series 1 injectors
        43.5 psi for fuel pressure


        i was gonna double check the fuel pressure but i got got out in the massive downpour yesterday and that pissed me off.

        i changed the fuel filter yesterday. dont know if it helped but the one i had on was on there since 05.

        ive got a set of 36lb series 3 injectors to use just gotta get the brackets from ben for the fuel rail.
        Last edited by geldartb; 07-08-2009, 10:09 AM.
        sigpic
        99 Grand Am GT
        3400/3500 -Solid trans mount--TCE 65mm T-body---85mm LS2 maf---1 1/4' TCE intake spacers with 3400 upper--SLP Catback with flowmaster 80--TOG headers
        Modded 3400 lifters with LT1 springs---Comp Cams 26986 Springs
        1357 cam 227 233 .050 dur
        515 515 lift 112 lsa
        15.232@88.85mph on stock 3400---New time to come


        Comment


        • No need for bigger injectors, a pos LTFT does not show that... if you were getting a very high duty cycle at WOT then yes you need larger ones.

          My IFR is 278 since I'm running the 28lb MII ones, but I think my 65+ psi of pressure puts them to 30 at some times.

          Got Lope?
          3500 Build, Comp XFI Cam 218/230 .050 dur .570/.568 lift 113LSA
          Fully Balanced, Ported, 3 Angle Valve Job, 65mm TCE TB, S&S Headers.
          Stage-1 Raybestos/Alto 4t60e-HD, EP LSD, 3.69FDR
          12.61@105 Epping NH Oct 2015 Nitrous 100shot (melted plugs) 13.58@98.8 N/A 3200LBS

          Comment


          • heres the info from today


            i keep forgetting the scanner is running so thats why the files are big. to bad this wasnt my VE tune id have oodles of data to go off of.

            scared the shit out of myself today. was pulling out of a street got on the pedal a little bit heard a big pop/crack so i let off the pedal but it was just shit in the road.
            though i fragged an axle.
            sigpic
            99 Grand Am GT
            3400/3500 -Solid trans mount--TCE 65mm T-body---85mm LS2 maf---1 1/4' TCE intake spacers with 3400 upper--SLP Catback with flowmaster 80--TOG headers
            Modded 3400 lifters with LT1 springs---Comp Cams 26986 Springs
            1357 cam 227 233 .050 dur
            515 515 lift 112 lsa
            15.232@88.85mph on stock 3400---New time to come


            Comment

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