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Knocking in motor at high RPM's

This is a discussion on Knocking in motor at high RPM's within the Internal Engine forums, part of the LSx Technical Help Section category; ...

  1. #1
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    2001 WS6 TA

    Knocking in motor at high RPM's

    I have a 01 WS6 with minor bolt ons. GMAFS, lid, K$N, Smooth bellow and that is all of the Engine mods. The car has 35000 miles on it and rarely gets driven. I am having a problem with the motor ‘Knocking’ between 5300 and 5900 RPM. It almost sounds like Octane knock but I have put Octane booster and 0 -60 in the tank. I had it on an AutoTap early this year and the guy thought that my timing was off a little at high RPM’s and I cleaned the MAFS. Any ideas??? I am going to put the stock MAF in the car and see if my GMAF is bad.

  2. #2
    member since may 2000 nhraformula's Avatar
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    2000 nhra edition formula

    all aftermarket MAFs suck and cause the ping you are getting.

    the stock maf flows well beyond 400 rwhp.
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

  3. #3
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    So is it a bad MAF or just the way they are designed?

  4. #4
    Rollo Tomassee AKIRA's Avatar
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    I cant help ya..

    But does cleaning the MAF sensors help with pinging? My engine pings too...
    How cleaner spray is used for the maf again..?
    99 T/A M6
    LS6 intake, Hooker Coated Long Tubes, Y-pipe w/1 carsound cat, Hooker Catback, MTi Clear Lid, FRA w/ Holley Power Shot, ASP crank pulley, 1.8 RRs, 3.73s w/TA girdle & Eaton Differential, Granatelli SFCs, Pro 5.0 Shifter, LS6 Clutch, Diablo, TByrnes Maf Ends (in winter), All the Free Mods

  5. #5
    member since may 2000 nhraformula's Avatar
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    get rid of that aftermarket peice of shit.
    the car didnt start pinging till after you install the maf.

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