Emag/Pmag uses manifold pressure and RPM to determine the spark advance depending on which ignition profile is selected. ?Manifold pressure tells it how much you are asking of the engine, so when you throttle back or are at high altitudes, the manifold pressure is way down and the ignition will advance. ?Using the aggressive profile, 2500 rpm and 30" MAP and the ignition will be at 25* BTDC. ?2500 rpm and 19" MAP and the ignition will be at 39* BTDC. ?Everything else is going to be somewhere in between as determined by the processor. ?I should also note that the ignition retards back to 0* for startup and is retarded for idle. ?Makes the O-200 idle like my Honda. :o)
-Jeff Scott Los Alamos, NM > ----- Original Message ----- > From: Bob Lee > Sent: 07/13/13 06:34 AM > To: 'KRnet' > Subject: Re: KR> Additional testing data with P-mag timing > > Jeff, > > You wrote: << However, the additional timing advance will allow you to save > fuel by burning more of it in the cylinders and less of it in the exhaust, > especially if you fly throttled back or at high altitudes. >> > > Your post begs the question: How do it know we "fly throttled back or at high > altitudes"? What additional data besides ignition trigger does the P-mag have > to decide to advance the ignition? > > Regards, > > Bob Lee > KR-2, 90% done only 68% to go! > Suwanee, GA USA > > > _______________________________________________ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options
