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Thread: 3/8 Mile Gearing?

  1. #1
    Junior Member
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    3/8 Mile Gearing?

    New to this sport and not sure what gear set I should run for a 3/8 mile track with mild banking. Running an oil-cooled Suzuki GSXR 1127. Rear-end is a 10 bolt Toyota and a 390 gear set is in now. I recieved a 358 and 341 along with the car. Any input would be great.

  2. #2
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    The 358 should work good in second gear if the 390 is bogging down in third gear.

  3. #3
    Senior Member rat95's Avatar
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    If it is a short 3/8 358 in second. depending on tire size. I would say start with the 358. We also run a track that they call a 3/8 it is closer to a 1/2. 390 in 3rd there.

  4. #4
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    How do I interpret the gear ratio charts? I understand changing the rear-end ratio will decide the overall ratio, but what information does this value give me? Are there any type of calculations I can use to determine how far the car will pull before hitting the rev limiter? Thanks for the help.

  5. #5
    Senior Member rat95's Avatar
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    The chart is a basic set up info. It gives you a starting point. I will ive you an example of what I did. We run a track that is big. So I was running my 373 in 4th. It was doggy getting off the corner. So I went to the gear chart, and found a tranny/rear gear combo that was a little shorter. I could have went with a 341 in third. But for my motor the 390 in 4th was a better ratio. It's just really for your motor and driving style. Try the 358 find the final gear, if it is doggy or short. Find a final ratio that is closer to what you need.

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