Originally Posted by pengaru' date='Jun 4 2003, 10:29 PM

using softer springs on the brushes will increase commutator and brush life.



having a true commutator makes it possible to run even softer springs because the brushes won't start floating due to a comm that is out of round... I don't know what these components will be like in a rx-8 air pump though. but if your comm is out of round it needs stronger springs to keep the brushes in contact with the comm...



I think lowering the voltage might improve the lifespan if the rpm is lowered as a result, just less wear on the comm and brushes.



I wouldnt worry about the internal winds too much as long as the pump doesnt run hot, if it gets hot then I can imagine it's possible to get an internal short if it gets too hot and the insulation fails, causing a premature failure... just don't mount it close to your header