Auto Restorer Community / Auto Restorer Forums / Auto Restorer Discussions / formula for computing RPM / Latest PostsInstantForum.NET v4.1.2Auto Restorer Communityhttp://www.autorestorermagazine.com/ar/board/forums@bowtieinc.comSat, 22 Nov 2008 15:39:29 GMT20RE: formula for computing RPMhttp://www.autorestorermagazine.com/ar/board/Topic303-4-1.aspxYou can find many automotive math calculators including one that will find engine rpm based on tire diameter, and gear ratios at: <A href="http://www.csgnetwork.com/automotiveconverters.html">http://www.csgnetwork.com/automotiveconverters.html</A></P><P>You can find all kinds of other calculators at the home page:</P><P><A href="http://www.csgnetwork.com">http://www.csgnetwork.com</A></P><P>I hope this helps <img align="absmiddle" src="http://www.autorestorermagazine.com/ar/board/Skins/Auto/Images/EmotIcons/Smile.gif" border="0" title="Smile">Mon, 30 Jun 2008 01:27:48 GMTGearhead Girlformula for computing RPMhttp://www.autorestorermagazine.com/ar/board/Topic303-4-1.aspxAbout 4 or 5 years ago an article in Auto restorer included a formula for computing engine RPM by knowing speed, gear ratios and wheel diameter. At the time it worked fine for me but I have misplaced the article. Similar articles I have seen don't seem to compute correctly like that one did.Wed, 25 Jun 2008 13:20:36 GMTpaul helman