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    Author Topic: T/a radials 275 60 15  (Read 993 times)

    Offline Moparal

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    T/a radials 275 60 15
    « on: December 26, 2007 - 03:07:38 PM »
    At 2200 rpms, with the bf goodrich tires 275 50 15 on the car with 323 gears, should this be around 55 mph?
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    Offline vinb

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    Re: T/a radials 275 60 15
    « Reply #1 on: December 26, 2007 - 03:21:13 PM »
    275/60/15 tire, 3.23 gear, auto trans that sound pretty close give or take 100 rpm...
    http://www.moparts.com/Tech/tech/img/AUTOMATICchart.xls
    « Last Edit: December 27, 2007 - 08:50:43 PM by vinb »
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    Offline Moparal

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    Re: T/a radials 275 60 15
    « Reply #2 on: December 26, 2007 - 04:26:27 PM »
    Good. I also forgot to mention 4 spd.   I was hoping it was close to that.  I need to fix my speedo.
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    Offline 73Chally

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    Re: T/a radials 275 60 15
    « Reply #3 on: December 26, 2007 - 04:41:16 PM »
    vinb - Thanks for the link.  That's pretty cool.  I don't currently have a tach so I've been real curious what I'm turning on the highway with 3.91s.
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    Offline 422STROKER

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    Re: T/a radials 275 60 15
    « Reply #4 on: December 26, 2007 - 10:29:26 PM »
    If you have a portable GPS unit you can take it with you to verify MPH's.

    Mine says 70 when going 60.LOL

    Tom
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    Tom
    12.77 @ 108.87 15" Street Drag radial tires 3.23 gear

    Offline Carlwalski

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    Re: T/a radials 275 60 15
    « Reply #5 on: December 27, 2007 - 09:28:51 AM »


    Just for reference, I have 3.91 gears and in OD they equate to 3.05.
    I'm running 60mph @ 2,200rpm, perhaps slightly lower if anything. That's with 275/60s.


    :thumbsup:
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    1970 Dodge Challenger R/T
    White, License Plate, 0A-5599
    540ci Aluminium Hemi, F.A.S.T EFI
    TF-727 Gear Vendor OD, Dana 60
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