Pietenpol-List: Magneto Questions
Posted: Thu Aug 04, 2016 9:58 am
Original Posted By: Ray Krause
Thinking about a Model A Ford engine. I have located a head with 2 spark plugsper cylinder. My question is how to fire the plugs. I have model A cars withWICO model XVD-2339 magnetos mounted on the head and driven by the oil pumpshaft. WICOs have 12 degrees of Lag. I have located a casting to allow meto mount a SLIKK magneto run off the cam gear. Some use the SLIKK 4330 RH magnetowhich has 25 degrees of Lag. And the plans show a magneto driven off crankshaft.Here are my questions :1) what are people using for crankshaft driven magnetos ?2) while 12 degrees lag is great for cars, is 25 degrees lag needed for fasterturning airplane engines. What Lag is best ?3) what other magnetos are worth looking at ?John________________________________________________________________________________
Thinking about a Model A Ford engine. I have located a head with 2 spark plugsper cylinder. My question is how to fire the plugs. I have model A cars withWICO model XVD-2339 magnetos mounted on the head and driven by the oil pumpshaft. WICOs have 12 degrees of Lag. I have located a casting to allow meto mount a SLIKK magneto run off the cam gear. Some use the SLIKK 4330 RH magnetowhich has 25 degrees of Lag. And the plans show a magneto driven off crankshaft.Here are my questions :1) what are people using for crankshaft driven magnetos ?2) while 12 degrees lag is great for cars, is 25 degrees lag needed for fasterturning airplane engines. What Lag is best ?3) what other magnetos are worth looking at ?John________________________________________________________________________________