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Thread: Bolt on upgrades to increase HP for 01 Bullitt

  1. #21
    SlipperyVic
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    That's a real bummer. I've fought with going 3.73 or 4.10's for my car and I was leaning towards 3.73's before and this confirms it.

  2. #22
    Club Supporter Laffs's Avatar
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    That RPM seems super high. I was only around 2500 RPM at 120kmh on my stock T45 w/ 4.10s IIRC.

    What size tires are you running and how was the speedometer calibrated?
    Quote Originally Posted by ludacris View Post
    I'm Supercharged with the HideAway License Plate

  3. #23
    Member JZ67's Avatar
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    Quote Originally Posted by Laffs View Post
    That RPM seems super high. I was only around 2500 RPM at 120kmh on my stock T45 w/ 4.10s IIRC.

    What size tires are you running and how was the speedometer calibrated?
    Stock 245/45/17. Speedo wasn't calibrated. Forgive my ignorance, how would speedo calibration impact rpm?

  4. #24
    Member bbriann's Avatar
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    The rpm will be accurate at if actually doing 60 mph.rpm guage will always be accurate.

  5. #25
    Club Supporter Laffs's Avatar
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    Quote Originally Posted by JZ67 View Post
    Stock 245/45/17. Speedo wasn't calibrated. Forgive my ignorance, how would speedo calibration impact rpm?
    If your speedometer is off how would you verify you are actually going 120kmh? RPM would be accurate regardless of indicated speed yes.

    Based on this calculator you should only be turning 25xx rpm

    https://www.cjponyparts.com/resource...rpm-calculator
    Quote Originally Posted by ludacris View Post
    I'm Supercharged with the HideAway License Plate

  6. #26
    Super Moderator Stephen06GT's Avatar
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    Quote Originally Posted by JZ67 View Post
    Stock 245/45/17. Speedo wasn't calibrated. Forgive my ignorance, how would speedo calibration impact rpm?
    Do you have a GPS you can use to confirm your actual speed?

  7. #27
    Member JZ67's Avatar
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    At 60mph (gps measured) the rpm was at 2500.

  8. #28
    Super Moderator Stephen06GT's Avatar
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    Quote Originally Posted by JZ67 View Post
    At 60mph (gps measured) the rpm was at 2500.
    5th gear?

  9. #29
    Member JZ67's Avatar
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    Sorry, I neglected to mention that I was using a gps to determine actual speed/rpm.

  10. #30
    Member JZ67's Avatar
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    Quote Originally Posted by Stephen06GT View Post
    5th gear?
    yup

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