waynebergman
100 kW
Thought I would share my opinions on the two different motors I have been running on my 2004 Giant DH.
The bike is fairly heavy at 85 lbs with the HS3540 and it weighs around 80 lbs with the Mac 10t. So around 220 lbs for bike and rider. I am running an Infineon 35 amp controller with two Samsung 48v 10ah Lith Mang batteries. Running the batteries in parallel so 48v 20 ah. Controller is sending around 1600 watts to motor with the present set up. My pin outs for hall and phase wires are set up so I can just swap out the wheel and plug in and go for easy changes between the two motors.
After having my Mac 10t up and running now for the last week I have been able to ride some of the same stretches of road and sections of trail to compare performance and AMP HOURS used for each section of testing. I have been using the same bike sets up except for swapping out my wheel sets. I have an HS3540 laced up to a 24 wheel set and my new Mac 10t laced up to the same 24" rim diameter with the same tire mounted on both.
Top speed on the HS3540 on the flats with no pedal assist around 31mph and on the mac around 26. I am running wide 24" tires so the circumference is 2003mm so a bit larger diam than a narrower 24" tire I think.
Torque for climbing hills is no contest. The little Mac 10t seems to be in its happy zone the whole range from 0 to 26 MPH. This little motor works really nice for hill climbing. The HS3540 is a big disappointment for climbing hills unless you can help it up to speed with pedal assist (at least with my low wattage) which means if the hill slows you down to less than 15 MPH the motor is not happy and you can hear it labouring. You have to pedal very hard on the steep stuff or get off and walk. So this HS3540 seems to be a good motor BUT with my 1600 watts and wanting to ride up trails and not just down them I have found the HS3540 to really bog down and sound unhappy at slow speeds climbing medium to steeper trails. Straight out pavement riding its fine and its cool to cruise along the country roads by my place at 30MPH.
The real nice things for me on the Mac 10t are………..
1. Lighter in weight
2. Smaller diam hub flanges which I think make for a stronger wheel and easier to lace up.
3. It coasts like a dream. Unlike the HS3540 which seems to have a huge amount of drag when coasting.
4. It seems pretty efficient for the riding I do. I realize the DD HS3540 would be more efficient if it was in its happy zone more but seeing as I ride a few hills I am finding much better AH per kilometer on the MAC 10t. (stats below)
5. It has some real good torque or good enough for me considering I am only running 1600watts. Photos attached shows the view from a 300 or 400 foot elevation climb I did today.I used 1.5 AH to climb this hill. Pretty steep switch backs for most of the climb up. Short climb for sure but no heat at all on the motor just warm to the touch after reaching the top of this short climb. I had it pinned the whole way. This same trail on the HS3540 just forget it. You be walkin.
6. It is very quiet. It is not as quiet as the HS3540 but very close.
On my HS3540 for most of the riding I would do like rolling hills mixed in with flat section I would pretty much pin it most of the time and I would find if I rode 16 kilometres I would use 8 AH. The same stretch of county road on the MAC 10t I used 5.5 AH and of course I would be going 5 MPH slower on the MAC. Maybe the HS3540 would have the same efficiency if I went a bit slower as well but I doubt it…..also its hard to nurse the throttle to 80% of full with my controller and twist grip, its easier on my bike to just pin it. So on this ride I do often the Mac is about 40% more efficient I figure.
I realize that what I am saying about the Mac in this comparison does not mean its a better motor for you, but for me its the winner in just about every way. Why this Mac is so cool for me is it lets me ride the type of riding I mostly want to do on 1600 watts. If I want more speed and or have a need for big watts then my comparison may not be very relevant for such a high watt set up. One more disclaimer, I am new to the electric biking world so there is a lot I don't know or may be wrong about in my efforts to do this comparison but for what it is worth this is how I feel about this wonderful little motor.