Hi all: The subject of rams has arisen again so I want to call attention to 2 simple formulas for calculating the desired rpm vs. duration should one wish to opt for a maximum torque at another rpm other than the standard 2800 for long rams. The formulas below are the result of manipulating and simplifying the formulas in the article "All About Rams" in the club's web site. To determine RPM at which maximum torque will be attained when valve duration is known: RPM = (720 - D)6.195 or; To determine required intake valve duration in degrees to attain maximum torque at a preselected RPM: D = 720 - RPM/6.195 Where: D = Intake valve duration in degrees NOTE: In order to attain maximum torque, the cam gear must have the cam locating pin hole retarded 2 degrees! I have prepared a table using the above formulas for a large range of valve durations. It can be seen at the following URL. When you paste this URL into the search engine, delete the "a" in front of http. Also included in the chart are harmonics for each duration. For the life of me, I cannot remember why I calculated these, its been so long ago. ahttp.//www.chrysler300club.com/tech/reitz/formulas.htm Have fun. Dan Reitz Northridge, CA [Non-text portions of this message have been removed] To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/