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Thread: correct rear gear

  1. #1
    Member MASTER JOURNEYMAN
    Join Date
    May 2004
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    43

    correct rear gear

    I have purcased a new car and want to know what gear would be better.The car is a square tube chassis Camaro that will weigh right at 2450 lbs with me in it, the motor is a sbc 383 stroker with about 650hp and I'm using a power glide with a 1.82 firts gear and a 55oo stahl converter..The rear is a narrowd 9 inch with a 31x10.5x15 tire..What gear would be best..??
    Thanks

  2. #2
    Senior Member RACING JUNKIE
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    Sep 2007
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    Belleville, IL
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    Kinda need to know redline on the motor...

    But, I'm thinking 4.88s or 5.13s.

  3. #3
    Member MASTER JOURNEYMAN
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    May 2004
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    I usually don't go any higher than 6800, shift at 6400

  4. #4
    Senior Member RACING JUNKIE
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    Quote Originally Posted by nova2206
    I usually don't go any higher than 6800, shift at 6400
    5.14

  5. #5
    Senior Member RACING JUNKIE
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    san antonio, texas
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    yea the 31" tire will work great with the 5:14 ratio :wink:

  6. #6
    Senior Member MASTER BUILDER
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    Competition Engines & Hardcore Engine Parts
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  7. #7
    Senior Member RACING JUNKIE
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    May 2006
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    2,044
    I would think where you'll be racing most would be a factor.
    I.E> 1/4 verses 1/8?
    If the 1/8 I would start out with a 513 and see what the motor likes, maybe up to a 538 or down to a 488 remember the more motor you have the less gear you need, but likewise the less gear you have the harder on parts it will be.
    In the 1/4 I'd start out with a 430, or 456 and go from there to see what the motor likes and where the rpms are in the traps. But what do I know.
    Goodluck, Charles
    ***IN GOD WE TRUST***

  8. #8
    Senior Member RACING JUNKIE
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    4,143
    Quote Originally Posted by cepx111
    .
    Racecar spelled backwards is, racecar.....

    haha...never noticed that b4.


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