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What gear ratio

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Old 02-08-2013, 11:28 PM
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Default What gear ratio

Car is a M6 28" tall rear tire.
76MM turbo right now making mid 500's to the rear.
Going to turn it up once I get a new rear end goal right now is 650-700 to the tire( havn't decided what im going with yet ) street / strip car.
What do you guys recommend?
Thanks
Old 02-09-2013, 11:32 AM
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Probably something in the 3.50 to 3.73 range. What mph and rpm do you expect to trap at? What is the peak hp rpm?
f-body.org/gears calculator,
28" tire 6k rpm with 3.73s=134mph

You've got some figgerin' to do.
Old 02-09-2013, 10:43 PM
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Do you plan on tracking the car a lot? Long gears are great with turbos. If you plan on doing highway pulls and such, a 3.42 gear like stock would work great. If you plan on tracking the car more a 3.73 or even a 3.90 may work. A local made 695whp thru his turbo LS1 and with 3.73s and a stick the gears matched quite well.
Old 02-10-2013, 12:47 AM
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i'd say 70 % street with highway rolls 30% track. Of couse i say that.
Right with stock rear and 3:42 is pretty damn good right now. turing 1700ish RPMs at 70mph. Car is pretty quick from a 50 roll leaving in second. Maybe ill stick with 3:42 ish.
Old 02-17-2013, 03:58 PM
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im pretty much in the same boat, will be running 28s with a m6. car now has 4.10s and n\a but am purchasing the on 3 turbo kit soon and will need to change gears also. looking to make 600whp ill be more then happy with that



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