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Old 01-16-2012, 02:51 PM   #40
DSPographer
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Drives: '13 BRZ Lmtd
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Quote:
Originally Posted by ajc209 View Post
Based on the ratios in the chart, it should hit 61MPH in Second gear @ 7500RPM with the manual gearbox......
My calculation doesn't agree with that value. The ETRTO rolling circumference for a 215/45R17 tire is 1907mm according to here:
http://www.club80-90syncro.co.uk/Syn...calculator.htm
Even calculating for increased circumference at a speed of 100 km/hr for 215/45R17 87W here:
http://bndtechsource.ucoz.com/index/...alculator/0-20
Only increases the circumference to 1909.7mm. So my calculation for 2nd gear at 7500 RPM is:
1909.7/25.4/12*7500/(4.1*2.188)/88 = 59.5 MPH.
This value seems a bit too low for good 0-100 Km/hr. times unless the fuel cutoff is extended slightly in second gear. Given the 3.727 rear end ratio then 2nd gear reaches 65 MPH at the stated 7450 red-line: which seems higher than expected from some of the posted videos. I wonder what ratio Subaru will use in the US?
BTW I noticed that the gear ratios including the 4.1 rear end ratio are exactly as given in the GT-5 game as I posted here:
http://www.ft86club.com/forums/showp...5&postcount=25

Last edited by DSPographer; 01-16-2012 at 02:55 PM. Reason: Corrected tire size typo
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