Completed Cams/PI Swap Dyno Numbers

Discussion in '96-04 - 2V Specific' started by kenny150r, Aug 27, 2014.

  1. kenny150r

    kenny150r Member

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    Hello!

    Just got back from Dyno-Comp in Scottsdale, AZ. My PI swapped and cammed 98 GT went for 251 RWHP @5500 RPM / 273 RWTQ @3750 on a Dyno Dynamics dyno. The guy said on older mustangs a drivetrain loss of 30% was commonly seen. According to that, that puts the mustang at ~ 325 HP / 355 TQ at the crank.

    Just wanted to share!
     
  2. Gregor185

    Gregor185 Well-Known Member

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    Full pi or just headswap?
     
  3. kenny150r

    kenny150r Member

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    Both PI heads and intake with Comp Cams xe268h. Stock intake manifold, TB, exhaust manifold.
    [​IMG]
     
  4. RichV

    RichV Well-Known Member

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    30% ?!? That sounds legit. lol

    Your #s are where they should be.
     
  5. kenny150r

    kenny150r Member

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    I know... haha I expected them to say the drivetrain losses are around 10%. But on the other hand I've read Dyno Dynamics dynos can read low from time to time!

    This is also in 105 degree Phoenix weather!
     
  6. PikesPeakPony

    PikesPeakPony Member

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    Is it an auto? I'm about ready to pull the trigger on a ported P.I swap for my 96.
     
  7. kenny150r

    kenny150r Member

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    It's a 5 speed!
     
  8. kenny150r

    kenny150r Member

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    PikesPeak: It's worth it, but it was a total pain. Finding all the parts and putting it together took about 4-5 solid days worth of work. I did learn a whole lot though! In hindsight, I would have removed the engine from the car and possibly rebuilt the block (forged/stroked), but I am still happy with the way it came out!
     
  9. PikesPeakPony

    PikesPeakPony Member

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    good to know man. I feel like the PI is the only thing this 4.6 is missing to be a decent performer. I have a t45 as well.
     
  10. 96blak54

    96blak54 Legend

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    Be sure to post your dyno results into the dyno section! Sounds to me like a job well done! Congratulations
     
  11. 1997GT4.6

    1997GT4.6 Well-Known Member

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    With aftermarket cams only 250ish? Don't mean to sound rude, I just always thought they made closer to 300 wheel with PI intake, heads, and aftermarket cams.
     
  12. kenny150r

    kenny150r Member

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    I think their dyno must read low... My short block was in great shape and everything down to injectors and hoses were replaced during the swap (and all the carbon was cleaned off the pistons and other parts). The car feels like it has more than 250 RWHP; maybe that's why they give a 30% loss factor when calculating the crank HP?
     
  13. Burninriverdiver

    Burninriverdiver Well-Known Member

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    Good numbers, I might have to do this over the winter too
     
  14. RichV

    RichV Well-Known Member

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    I read the mods as PI heads and PI cams. I agree, if you have aftermarket cams, you should be making some more power.
     
  15. white95

    white95 Apex Junky Admin

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    Time to attack the 1320 for a trap speed figure to shed light on the true HP #!!
     
  16. 1997GT4.6

    1997GT4.6 Well-Known Member

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    So did I. But read post #3, the OP states that he has comp cams. Which, if that is the case, then the car is underpowered or the dyno is reading really low. Which the latter is possible.
    Yeah I think the dyno must read low. I have some friends that gone to dyno comp, I'll ask them their experience.
     
  17. DropTopPony

    DropTopPony Administrator Staff Member Admin SN95 Supporter

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    Thats pretty good with stock exhaust and no bolt on upgrades.

    Mid pipe would give you a good 10-15 hp.
     
  18. 96blak54

    96blak54 Legend

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    Cams with stock exhaust logs is killing it. Should get up there with long tubes
     
  19. twovalveterror

    twovalveterror Active Member

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    to be fair, the 268 is their most mild cam isn't it?
     
  20. kenny150r

    kenny150r Member

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    The cams I have are comps "stage 2," apparently they lose a bit of power in the low range when they're the only mod done.
    [MENTION=13702]1997GT4.6[/MENTION] please let me know what the peiple you know say about dyno comp! The place seems top notch, I know dyno numbers don't mean much when it comes to speed but still would be nice to know if others think their dynos are low balling!

    I'll have to take her to the strip once I get a chance!