I've got a new Reedy Quad Magnet 'spec' motor. I've dynoed it, but never ran it on the track due to lack of time. On the dyno I could tell no differance if I put the arm in a Ti can or if I ran it in the Quad can. I've played with the Ti arm in both cans, and the same results on the dyno... virtualy no differance based on wether the can had 2 or 4 magnets in it.
I've played with a Trinity Binary 19 turn motor too... and pretty much the same results with this... virtualy no differance between quad and two magnet setups... I've even got some track time in on the Trinity motors...
Oh... the Trinity based motors seem to put out more power at 4 cell voltages, at least on my dyno. On the track so far my Trinity based stuff is also faster.
I've heard that some Touring car guys are running the New Reedy 19 turn big comm motors with good results...
I've cut the timing tab on my Reedy... At any timing setting. the Reedy big comm armature seems to be lower RPM then the smaller comm arms of either Reedy or Trinity at a simmilar timing setting... So... Fantom dyno users are likely to never seen big numbers comming from their big comm arms... My Robi still shows the arms putting out simmilar power, but there is noticable differances in RPM. (and this seems totaly unrelated to the number of magnets in the can that is used)