Good advice always. My tire is the stock size to match the stock speedo, but the speedo is known to run about 12% low so we know we got errors anyhoo. My goal is to check the accuracy of the tach. If ground speed is known with a GPS and the ratios of the engine bone connection to the transmission bone connection to the differential bone connection to the tire bone connection to the road bone are known then engine rpms should be derivable, with windage for torque converter bone slippage tossed in. Will a defective forward clutch in the AT upset any of the bone-to-bone ratios? -- Mike "Rocket J Squirrel" Elliott 71 Type 2: the Wonderbus 84 Westfalia: Mellow Yellow ("The Electrical Banana") 74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano KG6RCR
On 11/17/2007 12:18 PM John Bange wrote: > On 11/17/07, Michael Elliott <camping.elliott@gmail.com> wrote: >> Bitchin'. Thanks, John! > > > one other noteworthy bit: since the speedo is calibrated for 805 revs/mile, > if you have a left front tire that is anything but 25" in diameter > (5280/805*12/pi=25.0535582), your speedo indicated speed will be off a bit. > Personally, I hardly even look at my speedo, insted just using my GPS. > > -- > John Bange > '90 Vanagon - "Geldsauger" |
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Vanagon mail messages have been archived.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.