JoeH Posted July 2, 2019 Share Posted July 2, 2019 I know you set injection timing to whatever the engine tag says, usually 18* or so at idle. I assume it advances as rpms increase. How many degrees advance is typical for a diesel? Specifically thinking about etech engines. Playing with some toy robot programmable microcontroller. Curious if it could handle a diesel engine. Quote Link to comment https://www.bigmacktrucks.com/topic/57941-timing-advance/ Share on other sites More sharing options...
Mackpro Posted July 2, 2019 Share Posted July 2, 2019 On the VMAC 1 engines , they had a 10 degree econovavce which was later bumped to 20 degrees and was carried over to the VMAC 2 engines. The fuel pump was static timed to 5-8 degrees (depending on emissions year) then the econovance would advance or retard the timing as needed. On the ETECH engines, I never found any data on timing Quote Link to comment https://www.bigmacktrucks.com/topic/57941-timing-advance/#findComment-426750 Share on other sites More sharing options...
JoeH Posted July 2, 2019 Author Share Posted July 2, 2019 So on the econovance E7 the injection advance runs from 5* to 28*, depending on emissions and specific engine characteristics. How exactly are the vmac1&2 injections done? Are they PLN with the econovance that acts like a points&condensor spark advancer? Anything electronic about the pump and injectors other than the econovance? Quote Link to comment https://www.bigmacktrucks.com/topic/57941-timing-advance/#findComment-426756 Share on other sites More sharing options...
Mack Technician Posted July 3, 2019 Share Posted July 3, 2019 Electromechanical rack positioning. Electrohydraulic Econovance. Timing sensor. Quote Link to comment https://www.bigmacktrucks.com/topic/57941-timing-advance/#findComment-426773 Share on other sites More sharing options...
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