1LikesThread: 20+mpg small block with carb.
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10-08-2012 12:39 PM #5
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2.73 times the .7 overdrive will produce a final rear gear ratio of 1.91
3.42 times the .7 overdrive will produce a final rear gear ratio of 2.40
3.73 times the .7 overdrive will produce a final rear gear ratio of 2.61
4.11 times the .7 overdrive will produce a final rear gear ratio of 2.88
The spread on the 700R4 is so dramatic that with the 2.73 gear you'd have a nearly unuseable 4th gear and with the 4.11 gear you'd have a nearly unuseable 1st gear. 3.42 or 3.73 would seem to be a good compromise, or use a 2.73/3.08 rear gear with a TH350.
Rear tire diameter will make a difference also.Last edited by techinspector1; 10-08-2012 at 12:42 PM.
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