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RPM on IX 4th gear w/ 26" Hoosiers?

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Old May 10, 2010, 08:51 AM
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RPM on IX 4th gear w/ 26" Hoosiers?

I have the unfortunate reality of using IX gearing on my sheptranny (due to me not switching gear ratios when i had my fpgreen =/ )
Anyways, i'd like to take a few passes before i yank the transmission again... so I was wondering what the trapspeeds are on IX 4th gear using 26" tires like the Hoosier DRs? I know VIII 4th gears can break 140mph around 8500-8600rpm.
Anyone familiar w/ how much higher a IX 4th gear would go?
this info would be great!

(IX 4th gear w/ 26" tires)
MPH at 8500rpm
MPH at 9000rpm
MPH at 9500rpm
Old May 10, 2010, 08:51 AM
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and obviously the stock final drive...
Old May 11, 2010, 09:26 AM
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On a 26" tire and a IX 4th gear:

8500rpm= 132mph
9000rpm= 140mph
9500rpm= 147mph

On a 26" tire and a VIII 4th gear:

8500rpm= 141mph
9000rpm= 149mph
9500rpm= 157mph
Old May 12, 2010, 08:53 AM
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great info!!! thanks!!




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