One thing I've noticed it that Tire Rack shows very different R/Mile than http://www.miata.net/garage/tirecalc.html http://www.tirerack.com/tires/Spec.jsp?make=Sumitomo&model=HTR% 2B&tirePageLocQty= 205/55VR16
811 vs... 848
On Nov 17, 2007, at 11:52 AM, John Bange wrote: > here are 63360 > inches per mile, 60 minutes per hour, so (conveniently) 60mph = 63360 > inches/minute. 63360 divided by 81 gives you 782 wheel RPM, which > multiplied > times 4.09 for the differential gives you about 3200RPM ideally. > Torque > converter slippage will trend that a little higher, how much being > determined by headwinds, hills, air resistance which increases at > higher > speeds, etc., but 10% makes a good high end guess, so divide by .9 > for 3555 > RPM. That means you should be indicating 3200-3500 RPM at 60mph. |
Please note - During the past 17 years of operation, several gigabytes of
Vanagon mail messages have been archived. Searching the entire collection
will take up to five minutes to complete. Please be patient!
Return to the archives @ gerry.vanagon.com
The vanagon mailing list archives are copyright (c) 1994-2011, and may not be reproduced without the express written permission of the list administrators. Posting messages to this mailing list grants a license to the mailing list administrators to reproduce the message in a compilation, either printed or electronic. All compilations will be not-for-profit, with any excess proceeds going to the Vanagon mailing list.
Any profits from list compilations go exclusively towards the management and operation of the Vanagon mailing list and vanagon mailing list web site.