MEFIburn

The way we read the MEFI 3, it shows a minute meter value for the total time the controller has been on a running engine. Keep in mind the same controller may have been run on a few different engines through out its life, so this is an accumulated total. It also displays current run time in seconds, which is since the engine was last started. This is useful to know if the engine has been running for 30 seconds or 30 minutes when you are viewing logged data.

The MEFI 4 shows an hour meter value which is again an accumulated value, in addition to times at various rpms and knock time. The MEFI4 will also show max rpm for the life of the controller. I always find this value interesting to look at on various engines. When I see a large long stroke big block value past 7000 rpm one day, and then a high winding small block value of 4600 rpm the next, it says a lot about their owners!