Tom, What I do on my 300G 413 is to time it by ear. That is, drive it and accelerate, like on a freeway entrance ramp, listen for pinging and retard the distributor a little at a time until I get it just right. Retard it just enough to get rid of most or all of the pinging, but no further. Bob J _____ From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of Chrysler300E@xxxxxxx Sent: Monday, September 07, 2009 3:19 PM To: Chrysler300@xxxxxxxxxxxxxxx Subject: [Chrysler300] Timing on the 413 .................................................... Happy Labor Day to everyone out there in 300 land! Quick question .................... when running the 413 (with twin bbl carbs) on 93 octane fuel, obviously when you "step on it" you normally get some pinging! Assuming you continue to run the engine on today's premium (93 octane) fuel, how many degrees do you recommend advancing the timing after top dead center? Tom Miami, FL (sweltering heat but knock on wood ............. no hurricanes this year ....... yet!) [Non-text portions of this message have been removed] [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 For archives go to http://www.forwardlook.net/300-archive/Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: mailto:Chrysler300-digest@xxxxxxxxxxxxxxx mailto:Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> 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/