Procharger Stage 2 Help With Knock

Discussion in 'Forced Induction - 5.0L V8 Engine' started by 5hlucky, May 9, 2019.

  1. Jay-rod427

    Jay-rod427 Well-Known Member

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    Post your logs to datazap.me, then share the links here. Can't get the excel to work.
     
  2. huntiez

    huntiez Well-Known Member

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    also check at the end if the tips touch your valen
    also check your tips if they touch the valence it will cause knock
     
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    5hlucky

    5hlucky Well-Known Member

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    5hlucky

    5hlucky Well-Known Member

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    Will do - thanks for the tips.
     
  5. SheepDog

    SheepDog Well-Known Member

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    I meant was the BOV actually getting a boost/vacuum reference? The blower produces boost no matter what, but if the vacuum/boost supply line to the BOV is kinked or isn't connected to the manifold properly, the BOV will not stay shut, or open properly when it should. If you are seeing knock even with the addition of Torco/Boostane you likely have something tapping on the engine or exhaust. Also, switch to Lund, VMP, Palm beach dyno for tuning. They know these cars better than anyone.
     
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    5hlucky

    5hlucky Well-Known Member

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    We hooked up a vac tester to the bypass valve and it opens/shuts when it should be. I traced the line from the valve to the vac block and don't see any kinks. yeah going to a big name shop for tuning has crossed my mind, but i'm not quite there yet.
     
  7. SheepDog

    SheepDog Well-Known Member

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    Also, 47 lB/Min Maf flow at 7000 RPM is basically NA values. Usually the value will be pegged at 96 Lb/Min in the higher RPM's.
     
  8. Jay-rod427

    Jay-rod427 Well-Known Member

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    Perfect. Looks VERY similar to mine did before desensitize. Once it started showing knock it wouldn't go away until basically back to zero throttle.

    Went back and forth with @ProChargerTECH, and he swore up and down it's never needed. But I know multiple people with centris both procharger and others have had similar problem.
     
  9. SheepDog

    SheepDog Well-Known Member

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    I don't doubt that the valve functions properly. Start the car and let it idle, then remove the vacuum tube from the valve and see if there is vacuum present at the end of the tube.
     
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    5hlucky

    5hlucky Well-Known Member

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    did that a couple weeks ago and vac was present.
     
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    5hlucky

    5hlucky Well-Known Member

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    Hrmm...could that be an issue with the tuning parameters or are you more likely to lean towards a mechanical issue?
     
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    5hlucky

    5hlucky Well-Known Member

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    Curious to know what your MAF flow was pre and post procharger tune vs your other tune. In reference to what SheepDog is telling me.
     
  13. Jay-rod427

    Jay-rod427 Well-Known Member

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    My MAF never showed being that weak. Like he said yours looks like N/A in good weather.

    Also I was never on Procharger tune so nothing to compare.

    https://datazap.me/u/jay-rod427/e85r5-6500?log=0&data=1-9-25
     
  14. markmurfie

    markmurfie Well-Known Member

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    Maybe an IMRC not opening issue.
     
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    5hlucky

    5hlucky Well-Known Member

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    sigh...there's about to be a low mile p1sc stage 2 kit for sale in the classifieds...
     
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