Procharger Stage 2 Help With Knock

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

  1. ahl395

    ahl395 Well-Known Member

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    A 3.9" will just about max out a P1SC and make around 14psi.

    If you're on 93 the most you'll want to safely run is usually about 12psi. I too vote for the 4.25". On the current pulley you're probably seeing like 8psi which explains why you're underwhelmed.

    I'm all for wastegating personally. It really wakes up the midrange. You could pulley down to 3.9" and wastegate to 12psi. Same overall boost but you'd get into it a little quicker. I don't tension my belt much tighter on my gated setup than I did beforehand. It can put more stress on the belt/blower/crank but I've been 40k miles so far without issue. Made an incredible difference in my car, you can check my build log for more info on my setup. The difference would be less drastic on a P1SC but definitely still noticeable.
     
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    5hlucky

    5hlucky Well-Known Member

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    Ok I’ll probably pick up a 4.25 and go from there for the remainder of this year. I see about 9psi MAX by 7k, and maybe 10 by 7200.

    I have seen you’re build, that’s what started me on the road to thinking about it. I’ll have to go check it again. Just sucks there’s no “kit” for it, have to have somebody local set it up custom.

    What do you do for the belt slip? You run a gates pulley or just able to size everything appropriately? Are you on the stage 2 8 rib setup?

    Thanks for the input!
     
  3. ahl395

    ahl395 Well-Known Member

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    Yes it's the 8 rib setup so belt slip isn't an issue. I run a Gates HD green belt but I ran an AutoZone belt in the past too lol. The stage 2 tensioner is stout. I tighten it so I can just about twist the belt 90 degrees at it's longest stretch, which is generally the standard for belt tension. No belt slip issues even when wastegating from 20+ psi to 12.
     
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    5hlucky

    5hlucky Well-Known Member

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    This is interesting...your blower bracket looks different than mine even though we’re both running the stage 2. Did the design change in the past 2 years? 483DB153-FB09-4A2C-A918-8AAC114314A6.jpeg
     
  5. ahl395

    ahl395 Well-Known Member

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    I have never seen that before.... Maybe someone else can shed some light on that.

    I assume it's a new tensioner design?
     
  6. turnswrench

    turnswrench turnswrench

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    Yes, new design. Acts more like a normal gates tensioner.
     
  7. 80FoxCoupe

    80FoxCoupe Well-Known Member

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    Who knows, I'm not concerned with boost pressure. 4.25 is easily doable on your fuel system with pump gas. As others said before, get some logs and send to tuner.
     
  8. Sawyerjames

    Sawyerjames Well-Known Member

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    I'm not sure on the differences between how the 17' and the 18' motors react to the PC set up, but I can tell you that my P1SC Stage 2 kit was spinning my 305's going WOT at 55-60mph. I am now running 325's in the rear and they still spin at WOT in 3rd with the 10 speed auto. I have to do my WOT pull logs for Lund in 4th gear and still spin a little once boost really kicks in, and that is with 325's...
     
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    5hlucky

    5hlucky Well-Known Member

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    Is it a better design or provide more consistent tension?
     
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    5hlucky

    5hlucky Well-Known Member

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    OK, 4.25 pulley ordered along with a gates k080660hd. Will update after parts arrive and I get some logs.
     
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    5hlucky

    5hlucky Well-Known Member

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    I think a huge diff between your car and mine is the 10 speed auto, 3rd for you isn't going to be 3rd for me. And obviously the differences in the motor. You know what pulley you're running?
     
  12. MyLilPony

    MyLilPony Naw It's Stock

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    The wastegate adds no additional pressure to the crank; it is completely separate. I have been kicking around selling my wastgate setup. You can see it on my build thread. Works perfectly but I debating going to twins and right now I am making more whp than I can use on the streets right now so I really don't need it. I loved it when I was using it, smash and go, really wakes up the mid range! Think about it and let me know... You would need the red race valve though if you don't have it.
     
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  13. whatsup62

    whatsup62 Well-Known Member

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    @5hlucky is this on a D1X?
    I just made the switch to a D1X and Red Race Valve from P1SC-1 . Went with a 4.5" pulley on the D1X stage 2 from a 3.85 on the P1SC-1.
    Went backwards in the fast dept.
     
  14. ahl395

    ahl395 Well-Known Member

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    How much boost are you seeing on the D1X setup vs the P1SC setup? Even if running the same max amount of boost, the D1X takes a little longer to make it. P1SC will be stronger in the midrange while the D1X will really take off up top and that could be why your car feels slower. The D1X would definitely benefit from a wastegate if that is the case. If not then you may just need a smaller pulley on the D1X.
     
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    5hlucky

    5hlucky Well-Known Member

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    Ok - so it sounds like as long as you aren't cranking down on belt tension it's no different really. What exactly would you be getting rid of in your setup, and how much are you looking to dump it for? I don't have a RR valve, but would likely want to consider other options that aren't quite as loud.
     
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