The RPM to MPH conversion charts are on the DMC-News web site. http://www.dmcnews.com/Resource/rpm2mph.html Hope that helps! Mark N VIN 6820 At 03:25 PM 6/3/2003 -0000, you wrote: <snip> >Was able to calculate tach Xrefs on I-95 using mileposts, but could >use some for lower gears in town. My terrain is flat so hills don't >need to be factored in. Could someone eMail >(brobertson(AT)carolina.net) or post a URL. <snip>