MAC motor + Trek 4300 build

[wineboyrider]

Squeaky clean build. Unlike the crap I throw together.

That's the same thing I do Dogman don't feel bad. I am always doing something different trying this or that, but haven't perfected any of my rides yet....

@ Neptronix: Nice build and well thought out. Your setup is just like mine (except the bike is crap ) I have a BMC 600w (via Lyen) and a 9 fet Lyen controller with 12s lipo I see 31 mph on the flats and I am a 200lb rider. I have a specialized hardrock frame that is stripped, but eventually the BMC will be it's home
I like experimenting with setups riding them and then tweaking them as I go. Problem is I got too many pots cooking..

[toft]

Nice build:) Im lookingfor a new motor and this mac from cellman now is my numero uno, but... second option is dd drive. And the question is: Onthe movies this engine sounds loudly? Its true is it loud?

[neptronix]

are they long hills or reasonably short?

I have yet to test the long term hill climbing. But at ~26mph for a few blocks on ~7% grade on 14s, i think it does well..

Same hill.. 10s.. i did about 15-18mph..

And that is one of those hills that there is no way you can pedal up... you have to walk !

Nice build:) Im lookingfor a new motor and this mac from cellman now is my numero uno, but... second option is dd drive. And the question is: Onthe movies this engine sounds loudly? Its true is it loud?

It is not as noisy as in the video, really. All geared motors make noise though. Fact o' life.

Wineboy; cool man. Yeah, don't let the pile accumulate too far. I suppose i am on limited $ so if something doesn't work for me, it's sold in short time to go towards the next project.

I am really happy with this motor. It does everything i want it to do. Of course i will probably need the green/gray gears soon if i keep abusing it like this ( 1500-2000watts ran through it already.. ).

[toft]

I cannot see driver... It is inside frame bag? This 30A infineon is from cellman?. You bought this driver with a motor? from ceelman?

[neptronix]

I cannot see driver... It is inside frame bag? This 30A infineon is from cellman?. You bought this driver with a motor? from ceelman?

Yep, the infineon 30a 9fet is in the topeak seat bag.
I got the 9fet and MAC motor from cell_man, all as one package.

[Hillhater]

. But at ~26mph for a few blocks on ~7% grade on 14s, i think it does well..

Same hill.. 10s.. i did about 15-18mph..

And that is one of those hills that there is no way you can pedal up... you have to walk !.

I am confused ?
you say 26mph on a 7% grade .. ? which is a hill you cannot pedal up ..??
Why can you not pedal up a 7% grade ?
I am the first to respect a hill and admit defeat, but even i can pedal up a 7% ...most cyclists would not flinch on a grade double that steep.

Conversly... 26mph on a grade that is too steep to pedal up ...is really impressive !

[neptronix]

I am confused ?
you say 26mph on a 7% grade .. ? which is a hill you cannot pedal up ..??
Why can you not pedal up a 7% grade ?
I am the first to respect a hill and admit defeat, but even i can pedal up a 7% ...most cyclists would not flinch on a grade double that steep.

Conversly... 26mph on a grade that is too steep to pedal up ...is really impressive !

Long hill. One that would be difficult to walk up. 220lb, and out of shape due to winter

This is my test hill. This data is according to google.


Yeah, it is not all 7%, but sections of it are close. It is the steepest hill i know of.
How could i more accurately measure grade?

[Hillhater]

wow 1 ..7% grade is the steepest hill you know ? !..seriously ?
That is not much more than a SLOPE to most folk !

[neptronix]

:shock: wow 1 ..7% grade is the steepest hill you know ? !..seriously ?
That is not much more than a SLOPE to most folk !

Hillhater
Location: Sydney ..(Hilly part !)

Ahh.....
There are some steeper grades, but yeah it is fairly flat here.
I'm a bit of a wimp because i have cardiovascular problems. But i also don't see any other bikers on this hill, unless they are walking up it.

Where i live is relatively flat. The road from where i live to get into Portland is a non-stop 2%-10% grade though. This goes on for about 3-6 miles. Many bicyclists avoid it and drive or take the local transit instead.

[Hillhater]

...I'm a bit of a wimp because i have cardiovascular problems. .

Aahhh ! dito here too. (HOCM ..Hypertrophic cardiomyopathy) .. hence the powered bikes.
I have also developed a inbuilt ability to detect any slight incline ,whether cycling or walking, and gauge my ability to make it up or not !

[o00scorpion00o]

Does anyone know what current the mac motor will take before the phase wires fry ?

I know the bmc's had major problems!

[BlackArrow]

Does anyone know what current the mac motor will take before the phase wires fry ?

I know the bmc's had major problems!

The melting phase wires occurred most of the time on the BMC 1000 Watts V3 motor with fast winding, needs higher current to get up the hill, BMC V2 600S or T (torque) didn't seem to have that kind of issues. A Mac motors is really close to a BMC 600 Watts therefore the risk off melting phase wire is reduce.

Good day!
Black Arrow

[neptronix]

Does anyone know what current the mac motor will take before the phase wires fry ?

I know the bmc's had major problems!

I don't know, but they look like they are 16 gauge . Oh well, nobody ever said geared motors were good for high amps.

[o00scorpion00o]

Thank's for the reply guys,


Happy Saint Patrick's day !

[psycholist]

Nice clean build Neptronix! Admiring those beefy flat dropouts. I have an Ironhorse Warrior and fabbing the torque plates is going to be a little challenging. Are those nordlock washers on your axle? Whered ya gettum?

[neptronix]

nah, just the standard stuff that came with the MAC motor.

[Alan B]

The grooves in stock hubmotor nuts often look somewhat like NordLocks, but they are only attempts at one way ridges. They may help but don't have the features of the NordLock - that requires the system to get tighter before it can loosen, which tends to keep it where it is, in a little "valley" at the low energy point, and not loosen.

I got some NordLock washers at Mcmaster Carr.

[neptronix]

Thanks for the feedback, i saw the thread on those, but i think with the torque plates they are not necessary.
No axle rotation is possible, and the torque plates are certainly overspecced for my power level ( below 2000watt )

The pictures don't show it, but the dropout angle is at a backwards rake of an angle, meaning that i'd have to be going backwards at a high speed over a jump with the axle nut loose in order to have the wheel fall off.

[wineboyrider]

Thanks for the feedback, i saw the thread on those, but i think with the torque plates they are not necessary.
No axle rotation is possible, and the torque plates are certainly overspecced for my power level ( below 2000watt )

The pictures don't show it, but the dropout angle is at a backwards rake of an angle, meaning that i'd have to be going backwards at a high speed over a jump with the axle nut loose in order to have the wheel fall off.

Yep. I agree. My bike might be a cheap one that I have my BMC motor on, but it's nice and secure in there.

[Danos]

Hey Neptronix, did the MAC 500w motor come as part of a complete kit from cell man or was it just a motor in wheel? I've had sporadic contact with cell man, he seems pretty busy. I'm after a complete kit with motor, rim, controller, throttle, etc for my first build...would rather buy a complete kit than peice it together from numerous different sources. Cheers.

[neptronix]

Hey Neptronix, did the MAC 500w motor come as part of a complete kit from cell man or was it just a motor in wheel? I've had sporadic contact with cell man, he seems pretty busy. I'm after a complete kit with motor, rim, controller, throttle, etc for my first build...would rather buy a complete kit than peice it together from numerous different sources. Cheers.

Yeah he is quite busy.
I got the motor in a rim, controller, and throttle all in one from him. He has been talking about making a kit but i think the gray gears are the holdup. I am sure he can sell you the same thing.

[Danos]

What speed wind is your MAC? Cell man told me he has a couple of different winds...one's good for about 50kph on 48v and the other about 40kph on 48v but slightly better for hill work. I'd be looking at the slower one to ensure good hill climbing performance.

[neptronix]

No flippin idea.
I am sure this is the 'default wind'. I did not ask him for anything special. I have a strong feeling that the '50kph on 48v' is what i have.

This must be a pretty decent all-around wind though because it climbs hills very well, and has good speed on the flats considering i am only running it on 10S lipo.

[neptronix]

Oh dear. I believe we have a new speed record.

Charged up a 15S lipo to 60v and put it on the bike.

Thanks to the 11t-28t DNP Epoch freewheel, i went 36mph pedaling today on a flat.
That 11 tooth gear really makes pedaling at over 30mph possible.

No pedal speed was about 32mph.

At this wattage, those torque plates are a lifesaver. The motor really wants to knock you back. Not wheelie power, but it will raise the front shock if you are leaning forward.

I see how geared motors can get killed at these voltages or above. That's a lot of torque to dump from a standing start.

I think i will go back to 37v/10S. I am happy with 23-29mph. 14S/15S is really more for show.

[neptronix]

Allright, well i had to do a 15S hillclimb test

Battery charged to 60v, after a little bit of hoonin' around earlier.





Gnarly, no?

There were lots of stoplights, so i was climbing said hill at 20-29mph.
I had no idea it would go this fast up the hill. The torque band on this motor is like the gift that keeps giving.

Peak amps were 43a, which is bad considering the Infineon is only set to 30/80a.. hmmmmm..

Motor case did not get even warm to the touch !! what ???
Controller got pretty damn hot, now i understand why people use the 12fet controllers !! overkill is a necessity!!
The poor 5AH lipos were kinda hot. I suppose a constant 8C draw is a bit much for them, or sitting next to a controller that you could fry an egg on could have been the cause.

Went through 4ah on that hillclimb. Brakes were smoking hot on the way down. Certainly a good stress test, lol.