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Thread: Dyno results: MS4 & PRC Stg. 2.5 5.3l 59cc heads

  1. #1
    Lifetime Member Kevin Doe's Avatar
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    Default Dyno results: MS4 & PRC Stg. 2.5 5.3l 59cc heads

    My combo:

    93 RX-7 (FD)
    2004 GTO LS1
    MS4 cam, and PRC dual spring kit
    LS7 lifters
    PRC Stg. 2.5 5.3l CNC ported heads. Milled down to 59cc chambers
    60 lb/hr injectors
    LS6 manifold
    Shaner S3 ported and filled stock TB
    Dual 3.5" ramhorn style intake system.
    1 7/8" long tube ceramic coated headers
    True dual 3" with X-pipe, and no cats.
    3.55 gears

    The dyno was done on dynapacks, in 4th gear.

    Peak numbers:
    487 hp
    435 ft-lbs



    I also included the tune file for those that are interested.
    Attached Files Attached Files

  2. #2
    Lifetime Member mr.prick's Avatar
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    512k RoadRunner Firmware 12.14R
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  3. #3
    EFILive Developer Site Admin Blacky's Avatar
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    Wish I could find the time to get to a dyno and play with my ride for a while
    Paul
    Before asking for help, please read this.

  4. #4
    Joe (Moderator) joecar's Avatar
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    Nice work Kevin...

    If do you drive on the street, be sure to get the low rpm high map AFR/PE richer.

  5. #5
    Lifetime Member Kevin Doe's Avatar
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    Joe, what makes you say that? I developed the fueling curves/maps based upon what fuel made the most torque at that point.

  6. #6
    Joe (Moderator) joecar's Avatar
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    Kevin,

    I'm assuming VE table is correct for the top right corner of B3647... see my comment in the attached image (include the next few rpm rows also)...

    I am not saying you did it wrong... I am saying "what if this condition occurs"...

    Cheers
    Joe
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  7. #7
    Lifetime Member Kevin Doe's Avatar
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    Quote Originally Posted by joecar View Post
    Kevin,

    I'm assuming VE table is correct for the top right corner of B3647... see my comment in the attached image (include the next few rpm rows also)...

    I am not saying you did it wrong... I am saying "what if this condition occurs"...

    Cheers
    Joe
    I don't really think its a concern. 13.5 AFR should be fine I would think. But then again, I'd never floor it at 1000 rpms anyhow. All the dyno pulls I did were 2000-7000 rpms. At 2000 rpms WOT the AFR was good. I was never more than 1% off on my BENs by the end of dyno tuning.

  8. #8
    Joe (Moderator) joecar's Avatar
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    That's fine... I was just thinking of if that condition ever did happen, and I see that it wouldn't...

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