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gearing with a th350

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Old Aug 2, 2006 | 11:18 AM
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Default gearing with a th350

I am looking to pick up my 60'. I was wondering if I can run a 3.70 gear with a 28in tire and still run in the 1/4. What is the formula for top speed? Revs will be 6800.
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Old Aug 2, 2006 | 01:12 PM
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I run 4.1 w/ 28" and shift at about 6900, which gets me t0o about 102 in the eighth, if that helps, so figure another 25-28mph on top of that for 1/4.
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Old Aug 2, 2006 | 04:39 PM
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Originally Posted by n2o
I am looking to pick up my 60'. I was wondering if I can run a 3.70 gear with a 28in tire and still run in the 1/4. What is the formula for top speed? Revs will be 6800.
Nitrous car? Small shot you should be ok.
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Old Aug 2, 2006 | 04:58 PM
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Gear ratio x trap speed x 336 / tire size.
Example: 3.70 x 135 mph x 336 = 167,832/28 (inch tire height) = 5994 rpm. Add about 300 rpm for converter slip for an auto so about 6300 with an auto at 135 mph. This formula is dang close.
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