francisjohn
Active Member
Something scrolled across my screen just now, and let's chat about these higher ohm magnetos.
My thoughts? Pointless.
Have I owned one to have this opinion? No.
Circa 2008-2010, the magnetos that came in the kit were rated for around 400-450ohms and they were blowing CDIs. Specifically, Don Grubee then went to a 250 ohm mag but the engine would have a hard time starting. The 320-350 ohm range appears to be the sweet spot for these.
I don't doubt the magnetos themselves are the ohms they claim to be. What concerns me is the CDI though. I have found two different vendors who sell these fat magnetos and state there is a "high performance CDI" that goes along with it. However I don't think it can be ignored that these "high performance CDIs" are in the exact same casing as a stock one, almost as if it is.
I just bought the Parmakit CDI that has a retarded ignition curve at higher RPMs for my saw. I would say the magneto would handle just fine with that CDI. On a stock build, I genuinely can't see the point in a higher ohm rated magneto. I'm not sure what performance gain people expect other than a stronger spark, because if the spark is stronger, that results in what outcome then?
My thoughts? Pointless.
Have I owned one to have this opinion? No.
Circa 2008-2010, the magnetos that came in the kit were rated for around 400-450ohms and they were blowing CDIs. Specifically, Don Grubee then went to a 250 ohm mag but the engine would have a hard time starting. The 320-350 ohm range appears to be the sweet spot for these.
I don't doubt the magnetos themselves are the ohms they claim to be. What concerns me is the CDI though. I have found two different vendors who sell these fat magnetos and state there is a "high performance CDI" that goes along with it. However I don't think it can be ignored that these "high performance CDIs" are in the exact same casing as a stock one, almost as if it is.
I just bought the Parmakit CDI that has a retarded ignition curve at higher RPMs for my saw. I would say the magneto would handle just fine with that CDI. On a stock build, I genuinely can't see the point in a higher ohm rated magneto. I'm not sure what performance gain people expect other than a stronger spark, because if the spark is stronger, that results in what outcome then?