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Thread: 250hp Punto GT with GT2554r

  1. #31
    Punto Enthusiast
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    Quote Originally Posted by DR_EVIL View Post
    If you look at the afr graph you can see why, between 6 and 7000rpm it was running leaner, the next run had more fuel and made less power.
    Yeah but it could be that No1 Run was with cooler engine components (intercooler, intake, engine) So cooler charge, more oxygen, leaner AFR.
    And atlower revs you lean out some, but you make less HP.
    I dont think 0.3 AFR can make 6hp+ difference.

  2. #32
    PSC Trader DR_EVIL's Avatar
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    Quote Originally Posted by Ngt View Post
    Yeah but it could be that No1 Run was with cooler engine components (intercooler, intake, engine) So cooler charge, more oxygen, leaner AFR.
    And atlower revs you lean out some, but you make less HP.
    I dont think 0.3 AFR can make 6hp+ difference.
    Run number one started with 85 degrees water temp and 36 degrees air temp cooling to 13 degrees at 5000rpm. Duty cycle reached 67%

    Second run started with 80 degrees water and 37 degrees air temperature cooling to 11 degrees at 5000rpm. Duty cycle reached 71%

    I have the runs datalogged.

  3. #33
    Super Mario Superman's Avatar
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    Smooth Pete, smooth!

  4. #34
    Punto Lover
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    Pete was this with standard cam and pulley?

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