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I also have my idle set at 800 and when put in gear it drops to about half that. I know the 268 cam has a somewhat loopy idle




No alarm bells going off here guys?




Care to elaborate with some useful info or being sarcastic about something?


I think the remark was to illuminate the mechanical advance dropping back from say 10 degrees BTDC to say 4 degrees BTDC when put in gear, the less initial advance will make the motor drop more RPM when put in gear One of the accepted standards on RPM drop on initial timing and the mechanical ignition curve as well as setting the carb. up to idle on the idle circuit only is to have only 200 RPM drop from nuetral to in gear with a automatic trans that has a standard non racing converter, IE idles at 800 RPM in nuetral and drops to 600 RPM in gear The less initial advance you have at idle can lead to a bigger RPM drop if the total mechanical advance has to much in it IE if you have 13 degrees mechanical(26 total crankshaft degrees) advance in the distributor and you want to have 34 degees total advance you have to set the initial at 8 degrees BTDC, but if the distributor has 3 degrees mechanical advance in it at 800 RPM and drops 2 distributor degrees at 600 RPM you end up with 4 degrees initial in it at idle, most motors don't like to have 4 degrees advance at idle They do like 12 to 16 BTDC though at a 600 RPM idle speed Is that clear Lots of ways to make are hotrod motors run better, but it requires working on and modifying some of the parts to make them better


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)