Roush s/c low power on dyno

Discussion in 'Ford Raptor Engine Discussion and Performance Mods' started by RubyRedRaptor, Feb 12, 2016.

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  1. RubyRedRaptor

    RubyRedRaptor Member

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    Hi,
    I installed a phase 2 roush sc kit to my 2014 over Xmas.
    I didn't have access to ford scan tool to load the roush tune, so I opted for a custom team jdm tune I could load with my SCT.
    I was a bit disappointed with the performance gain with the s/c.
    I took it to a dyno to give it a few runs, more just to check tune was safe.
    I had max power at only 372hp? At 6.7psi.

    Is this normal? Team jdm claim 500rwhp from there kit/tune.

    I'm not sure of what psi they should run at but assumed it would be 8psi.

    Does anyone have any idea of what could be wrong?
    Mechanical or tune?
    Could the bypass be malfunctioning?

    I've attached the last dyno sheet.
    This is a 93 oct tune too

    Please help
     

    Attached Files:

  2. torrin

    torrin Full Access Member

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    What else do you have on it beyond the SC? Did you add exhaust, CAI, etc? What else have you done to let it breath better?
     
  3. RubyRedRaptor

    RubyRedRaptor Member

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    Roush cat back
    Roush cai

    Everything that came with there phase 2 off-road pack
     
  4. mike.s

    mike.s Full Access Member

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    Definitely seems low. I had 330 stock and 450 when my Whipple was first installed. With JDM tune, I was around 485. Roush should be around the same.
     
  5. RubyRedRaptor

    RubyRedRaptor Member

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    Yeah
    So why is the question
    What boost is stock for the 75mm pulley?
     
  6. mike.s

    mike.s Full Access Member

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    Is the line on the bottom your before dyno? Looks like around 240.
     
  7. RubyRedRaptor

    RubyRedRaptor Member

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    No that's the psi graph
     
  8. jokerz

    jokerz Full Access Member

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    Are you sure it's just not the Dyno selection.

    I have had customers Dyno there cars on two different types of Dynos and one Dyno read 806 on a Dyno pac and then went to a dynojet and it read 706.


    Sent from my iPhone using Tapatalk
     
  9. MTF

    MTF FRF Addict

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    They didn't do a base run before mods?

    Boost can vary by 1 to 2 lbs. depending on exhaust and SC pulley size.
    But 8 is the baseline.
    To me, it seems they did not setup the parameters correctly.
    Most dyno shops always display HP & Torque with a boost graph on the bottom for superchargers.

    You may want to invest in a OBD11 adapter and a phone app.
    Our PCM is capable of displaying HP & Torque at the flywheel or rear wheels and Boost plus a lot more.
    Most importantly the fuel trims!!! Short & Long
    This way you'll know if its installed correctly.
     
    Last edited: Feb 12, 2016
  10. jokerz

    jokerz Full Access Member

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    ImageUploadedByTapatalk1455290691.514765.jpg

    Normal Dyno graph for reference


    Sent from my iPhone using Tapatalk
     
    MTF likes this.

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