Differential (non-HD 3.05 to 3.29) swap questions... - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 11-05-2007, 06:25 PM   #11
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that nice but take a lot of pict doing it and total cost of everything i whant to know if this swap is worth it for 0.24 gear difference .what im doing is running a 1 inches shorter tire in the summer
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Old 11-05-2007, 06:48 PM   #12
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you know that MPH is


rpm x tire
------------
gear ratio x 336

3000 x27=81000
3.05x336=1024.8 81000 div by 1024.8 = 79.3MPH that stock

3000x26 =78000
3.05x336 =1024.8 78000divby1024.8 = 76.11 MPH that what im running in the summer 1 inches shorter tires


3000 x27=81000
3.29 x336=1105.44 81000 div by 1105.44= 73.27 mph that what you be running at whit 27 inches tires in 3rd gear that 6 mph difference from stock


3000x25.5 =76500
3.05x336=1024 76500 div by 1024.8 = 74.8 mph so whit a 1inches and half shorter tires am almost the same that whit 3.29 gear
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