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Can anyone help this calculation ?

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Old 11-17-2002, 09:57 PM
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Question Can anyone help this calculation ?

My last test got a few readings,I'd like to know the speed of an Mercedes auto transmission car.
V8 redline 6000 rpm, 5th gear 0.83, final axle ratio 2.82
stock tires : 245/40R17 => mods : 275/35R18
This's for calibration use.
What's the speed when the 5th gear hit the redline ?

Thanks !
Old 11-17-2002, 10:20 PM
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2002 C230K
195 mph
Old 11-17-2002, 10:42 PM
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Originally posted by dswildfire
195 mph
Thank you !
The D'/D = the calibration factor to actual speed ?
Old 11-17-2002, 10:58 PM
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2002 C230K
80.36/77.65 is the ratio of new rolling circumference to old. both number are inches per revolution. so yeah, your old max speed should've been 188. hope that helps.

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