Procharger Stage 2 Help With Knock

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

  1. 80FoxCoupe

    80FoxCoupe Well-Known Member

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    What pulley is on it now?
     
  2. SheepDog

    SheepDog Well-Known Member

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    I recommend driving it as is until you can do a fuel system, then you can crank up the boost a little. What is you elevation? What rear end gearing do you have? At 12 psi, and sea level you should being seeing somewhere around 700whp. Of course that can go 50 hp either way depending on a million other factors. If you trust that your tuning is spot on, and there are no mechanical problems, leaks, etc, then it should be pretty darn fast.
     
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    5hlucky

    5hlucky Well-Known Member

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    Stock 4.75 one that came with it.
     
  4. 80FoxCoupe

    80FoxCoupe Well-Known Member

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    Yeah, pulley down for sure. 4.25 to start.
     
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    5hlucky

    5hlucky Well-Known Member

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    673’ for altitude. Car has 95# DW injectors and a JMS - those aren’t good enough for a smaller pulley? From my searches that could take me to 800whp roughly. 3.31 rear end.

    I do need to get some actual numbers, either from a local dyno or a draggy or something. I should be able to do that in the next couple weeks.
     
  6. SheepDog

    SheepDog Well-Known Member

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    I meant that if you wanted to "safely" run at 14 PSI, you should probably have a return system. I think 800 WHP on a P-1SC is pretty much maxing it out on pump gas, .
     
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    5hlucky

    5hlucky Well-Known Member

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    Fair enough, makes sense. I appreciate the insight.
     
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    5hlucky

    5hlucky Well-Known Member

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    That should be like 12psi by 7k?
     
  9. SheepDog

    SheepDog Well-Known Member

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    You can always do a wastegate setup. Good luck sir, I bet if you put it on a Dyno you will be happy with the results.
     
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    5hlucky

    5hlucky Well-Known Member

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    I’ve considered that, best of both worlds from a centri and pd blower. That said it’d require custom fab that I can’t do. It might be something Ill upgrade to next year. I was just looking to get a bit more torque earlier on simply and cheaply right now.

    Only downside about a WG setup is wouldn’t it require more belt tension hence more pressure on the crank?

    I’m not so much concerned about what the dyno says and more how the car feels.
     
  11. SheepDog

    SheepDog Well-Known Member

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    get a Griptec pulley. Then you wont need to crank down on the belt so hard to prevent slip
     
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    5hlucky

    5hlucky Well-Known Member

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  13. SheepDog

    SheepDog Well-Known Member

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  14. SheepDog

    SheepDog Well-Known Member

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    You will definitely need a retune dropping that many sizes of pulley if your current one is 4.75.
     
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    5hlucky

    5hlucky Well-Known Member

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    Yeah for sure. Even dropping to a 4.25 without a WG setup I’d pull some logs and have them check it.
     
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