dogman wrote:I was browsing ebay, and noticed the 36v motors are only about $80. So as far as smoking a motor goes, that's a pretty cheap one.
So that upgrade makes sense.
I think your misinturpeting the idea of upgrading to 36v. By changing a 24v motor with a 36v motor is no real change in torque or speed. The ide is to run a 24v rated motor at 36v therefore, significantly increasing the RPM (speed and torque). of the motor. This does work well and many people have had good long term luck doing this. DrkAngel said is he has 6,000 miles on several bikes. But Drk please clarify ....is that on each bike or cumulative between all the bikes you are speaking of. If I remember correctly that's cumulative between all 3 of your EZips. Correct?
6000 miles@36v, on 2 EZip Mountain Trailz, #2@3000+ and #1@3000-. They were early 2008 models, so the controller supported 36v with no modification. #2 received 36v from day 1, much later I added the 16T upgrade, in conjunction with street worthy tires and the 11-32T 7spd upgrade. With pedal assist, 30 mph is obtainable. I've maintained 30mph for several miles with either a tail wind or drafting behind a larger vehicle. Above 20 mph, wind resistance is the major limiting factor. #2, I left geared for lower speed, and am presently running through its second winter, yes, I added studded tires.
The EZip oem 24v motor, run at 36v increases speed & torque by nearly 50%! 16mph > 23mph & power output increased from 450watts to 675watts. 750 watts = 1hp.
EZip #3 is a Trailz, not Mtn Trailz, slightly newer so it would have required a 36v controller. It was my testbed for the 16T freewheel upgrade and my 25.9v Li-ion build. Also tried a 24v Nimh build, using 20 - 7000mah D cells, it was better than SLA, but nowhere near Li-ion. Also added an 11-28T 7spd freewheel. Cruise speed is 22 mph, I can maintain 25 mph for brief periods, pedal assisted for a mile or 2.