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

    Vehicle(s):
    16 GT, 80 Fox
    Joined:
    Mar 28, 2018
    Location:
    Cincy, OH
    Posts:
    653
    Likes Received:
    283
    Rating:
    100%
    1   0   0
    What pulley is on it now?
     
  2. SheepDog

    SheepDog Well-Known Member

    Vehicle(s):
    2017 Mustang GT
    Joined:
    Nov 3, 2018
    Location:
    Colorado
    Posts:
    151
    Likes Received:
    54
    0   0   0
    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.
     
  3. OP
    OP
    5hlucky

    5hlucky Well-Known Member

    Vehicle(s):
    2017 S550
    Joined:
    May 7, 2019
    Location:
    IL
    Posts:
    85
    Likes Received:
    5
    0   0   0
    Stock 4.75 one that came with it.
     
  4. 80FoxCoupe

    80FoxCoupe Well-Known Member

    Vehicle(s):
    16 GT, 80 Fox
    Joined:
    Mar 28, 2018
    Location:
    Cincy, OH
    Posts:
    653
    Likes Received:
    283
    Rating:
    100%
    1   0   0
    Yeah, pulley down for sure. 4.25 to start.
     
  5. OP
    OP
    5hlucky

    5hlucky Well-Known Member

    Vehicle(s):
    2017 S550
    Joined:
    May 7, 2019
    Location:
    IL
    Posts:
    85
    Likes Received:
    5
    0   0   0
    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

    Vehicle(s):
    2017 Mustang GT
    Joined:
    Nov 3, 2018
    Location:
    Colorado
    Posts:
    151
    Likes Received:
    54
    0   0   0
    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, .
     
  7. OP
    OP
    5hlucky

    5hlucky Well-Known Member

    Vehicle(s):
    2017 S550
    Joined:
    May 7, 2019
    Location:
    IL
    Posts:
    85
    Likes Received:
    5
    0   0   0
    Fair enough, makes sense. I appreciate the insight.
     
  8. OP
    OP
    5hlucky

    5hlucky Well-Known Member

    Vehicle(s):
    2017 S550
    Joined:
    May 7, 2019
    Location:
    IL
    Posts:
    85
    Likes Received:
    5
    0   0   0
    That should be like 12psi by 7k?
     
  9. SheepDog

    SheepDog Well-Known Member

    Vehicle(s):
    2017 Mustang GT
    Joined:
    Nov 3, 2018
    Location:
    Colorado
    Posts:
    151
    Likes Received:
    54
    0   0   0
    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.
     
  10. OP
    OP
    5hlucky

    5hlucky Well-Known Member

    Vehicle(s):
    2017 S550
    Joined:
    May 7, 2019
    Location:
    IL
    Posts:
    85
    Likes Received:
    5
    0   0   0
    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

    Vehicle(s):
    2017 Mustang GT
    Joined:
    Nov 3, 2018
    Location:
    Colorado
    Posts:
    151
    Likes Received:
    54
    0   0   0
    get a Griptec pulley. Then you wont need to crank down on the belt so hard to prevent slip
     
    08fordgt likes this.
  12. OP
    OP
    5hlucky

    5hlucky Well-Known Member

    Vehicle(s):
    2017 S550
    Joined:
    May 7, 2019
    Location:
    IL
    Posts:
    85
    Likes Received:
    5
    0   0   0
  13. SheepDog

    SheepDog Well-Known Member

    Vehicle(s):
    2017 Mustang GT
    Joined:
    Nov 3, 2018
    Location:
    Colorado
    Posts:
    151
    Likes Received:
    54
    0   0   0
  14. SheepDog

    SheepDog Well-Known Member

    Vehicle(s):
    2017 Mustang GT
    Joined:
    Nov 3, 2018
    Location:
    Colorado
    Posts:
    151
    Likes Received:
    54
    0   0   0
    You will definitely need a retune dropping that many sizes of pulley if your current one is 4.75.
     
  15. OP
    OP
    5hlucky

    5hlucky Well-Known Member

    Vehicle(s):
    2017 S550
    Joined:
    May 7, 2019
    Location:
    IL
    Posts:
    85
    Likes Received:
    5
    0   0   0
    Yeah for sure. Even dropping to a 4.25 without a WG setup I’d pull some logs and have them check it.
     
  16. ahl395

    ahl395 Well-Known Member

    First Name:
    Allan
    Vehicle(s):
    2017 Mustang GT, 2006 Infiniti G35X
    Joined:
    Dec 30, 2015
    Location:
    NJ
    Posts:
    2,463
    Likes Received:
    973
    Rating:
    100%
    1   0   0
    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.
     
  17. OP
    OP
    5hlucky

    5hlucky Well-Known Member

    Vehicle(s):
    2017 S550
    Joined:
    May 7, 2019
    Location:
    IL
    Posts:
    85
    Likes Received:
    5
    0   0   0
    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!
     
  18. ahl395

    ahl395 Well-Known Member

    First Name:
    Allan
    Vehicle(s):
    2017 Mustang GT, 2006 Infiniti G35X
    Joined:
    Dec 30, 2015
    Location:
    NJ
    Posts:
    2,463
    Likes Received:
    973
    Rating:
    100%
    1   0   0
    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.
     
  19. OP
    OP
    5hlucky

    5hlucky Well-Known Member

    Vehicle(s):
    2017 S550
    Joined:
    May 7, 2019
    Location:
    IL
    Posts:
    85
    Likes Received:
    5
    0   0   0
    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
     
  20. ahl395

    ahl395 Well-Known Member

    First Name:
    Allan
    Vehicle(s):
    2017 Mustang GT, 2006 Infiniti G35X
    Joined:
    Dec 30, 2015
    Location:
    NJ
    Posts:
    2,463
    Likes Received:
    973
    Rating:
    100%
    1   0   0
    I have never seen that before.... Maybe someone else can shed some light on that.

    I assume it's a new tensioner design?
     
Loading...

Share This Page