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Old 11-13-2009, 09:36 PM
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Join Date: Nov 2007
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that logic with gearing works well for a light vehicle. once you start tossing in the weight factor normal thoughts are thrown out. Youre tahoe is easily over 5k in weight might even be close to 6k. youre standard height tire is about 31.5 and running a 373 might not be enought to help you get off the line. Ppl forget the fact that gearing as always helped a heavy vehicle make up for some lack of power. I went from 488s to 410s with a calculated 30" tire and i actually lost mph in the 1/8th. I gained more on the topend but lost it where i needed it the most. If i had a 32" tire i probably wouldnt hesitate on running a 430 gear combo to be honest if i was 6k in weight. The weight of the overall package also helps load the turbo so keeping a gear that will help you accelerate i think is more important then a lower [numeric] gearing.

also another way to look at is gear the vehicle for the mph you intend on running. Its better to be in the middle to peak of youre power band then the lower part crossign the traps. So figure on your mph and desired rpm then select gearing to go along with these based on your tire size.

your weight and rotating weight will help spool the turbo
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