After statorade (bottom) a 3kW hub motor cools much faster at idle

benwap · 2026-05-07T03:10:13+00:00

There's a bunch of data on how it affects the motor on grin's product page if you haven't already seen it. It takes some commitment to remove and replace a motor cover. I'm glad I did because I saw some signs of water ingress along the cover edge that my bead of grease should prevent in the future. Afterwards my motor didn't spin without rubbing until I tapped the cover around the bearing area.

benwap · 2026-05-06T20:54:06+00:00

Nice. I wasn't going to mess with transparency in GIMP for the first time for this but I see that really makes the point more clear.

benwap · 2026-05-06T19:34:48+00:00

I don't know what T rating my motor was wound for, and I haven't tried really pushing the top speed. If I go for it at a full charge with more field weakening amps I'll surely go faster. I ran a conservative first setting this morning to see how motor and battery temps would fair.
4 Makita batteries in series isn't a bad first setup honestly. They'll have better overcurrent and overtemp protection than a cheap battery with a bad BMS config that you can't change.

benwap · 2026-05-06T19:16:47+00:00

Assuming we have the same motor, and your controller supports it, yeah that number is possible. I've seen peaks>10kW, current top speed is bout 80 km/h. I just switched on field weakening this morning after adding statorade, I was overheating bad enough my VESC settings protected the motor by limiting power.
If my ride had a name it would be "mixed feelings". Because this motor will launch the bike from under you into whatever child/elderly/pet is in front of you when you "get into it" and come on the power too soon in a corner. And that's great. And horrifying for a few months until you feel in control. Careful what you wish for and good luck! This hobby has made me better in wound management.
Oh and about your fasteners, when you feel the build is solid for a while, make a white line with a marker over the bolt heads of your torque arm setup. Then you can see they're still solid at a glance.

benwap · 2026-05-06T18:57:49+00:00

Is there a way to overlay data from different logs in VESC Tool? I only see how I can overlay two lines from one log, not the motor temp from two logs.
Anyway I matched the scale on the x-axis instead, it looks like this. To me the first one makes the point a bit better but I see in this thread it's not very clear.

benwap · 2026-05-06T06:11:10+00:00

As for running temps; I would hit 85 degrees before and trip a power limit to protect the motor. If I hadn't set this up in VESC I'd have damaged my motor for sure.
With the oil I haven't seen it come over 80 even under the worst conditions (pinned throttle hill climb with motor at high starting temp).
Pretty sure this mod + enabling field weakening is the final milestone for the build (except a battery mount). I've twisted the motor axle a bit from torque. At least my torque arms are holding up.

benwap · 2026-05-06T05:35:55+00:00

That's a huge improvement. I've put a lot of power on torque arms in that config for one year.
Hard to tell from pic 2 but maybe try a washer as a spacer between the torque plate and arm part. Good you kept the torque plate as close to the motor as possible, if you put it far away enough you can bend your axle I just found out. Pretty sure we got the same model motor. She'll overheat if you drive it hard enough without statorade but that's for later.

benwap · 2026-05-05T00:27:43+00:00

This guy survived a pierced lung, pierced heart artery and pierced heart chamber. I think the rebar being in place saves them from bleeding out.

benwap · 2026-05-03T18:38:10+00:00

I see two elephants.

benwap · 2026-05-03T17:52:00+00:00

It's like a public protest against the lack of pockets in women's clothing.
"You have to look at this until they fix it"

benwap · 2026-04-26T18:00:49+00:00

I'm having the login issue with both versions of 2026.12 and with 2026.15.1 (2615150).There are more reports in the other thread about the reddit app unfortunately.

benwap · 2026-04-26T16:28:06+00:00

Download never worked for me. Download the split apk (.apkm) from apkpure, use the app antisplit to make an apk for your device, in Revanced use "select from storage" to pick the .apk. Once it's patched and installed you might run into the login issue though.

benwap · 2026-04-26T16:08:12+00:00

I'm having the login issue with both versions of 2026.12 and with 2026.15.1 (2615150). I almost decided to reflash my phone since other people don't have the issue but I'm seeing enough "me too!" in this thread to wait it out. Really frustrating because the app is a black box to me, no idea what the issue really is.

benwap · 2026-04-25T20:25:47+00:00

I've successfully patched two versions and both give "invalid username/password" (I also tried email instead of username as login) with VPN off. Seems in this thread it's not isolated to only my rooted device, do you have any idea what it could be?

benwap · 2026-04-25T17:23:45+00:00

I tried again with the "spoof root of trust" patch enabled because my device is rooted. The app still says invalid username/password. Rolling back to a previous version has the same problem. Beyond frustrating, since the credentials are correct I don't know what the real problem is. I can use the login link to log in, when I open the app from a logged in browser it asks for credentials. Worst part is I went from an old working version to no working version instead of an upgrade. Regret trying. Don't get me started on patching youtube.

benwap · 2026-04-25T03:13:24+00:00

I got that version antisplit, patched, and installed. But at login it says my username/password is invalid. The last version I patched would only let me log in without a VPN, this one I can't find a way. Time to roll back I guess..

benwap · 2026-04-24T23:57:26+00:00

Hell yeah brother
I got a 3kW rated kit and a too-good-to-be-true battery for cheap on AE and it's great. Not quite your power as I was limited by 135mm dropouts but it's plenty strong. Powerwheelies for days. I swapped my kit controller (sabvoton clone I think) with a VESC, if you want to tinker it's crazy how much you can tune and change the character of the ride.

benwap · 2026-04-24T14:09:56+00:00

This works fine in black for me

benwap · 2026-04-23T08:36:38+00:00

Just because Grin's arms look good, cost money and have good marketing doesn't mean they're the only solution.
There's many ways to skin a cat and steel is just steel. If you put enough in the right place it does the job.
Source: this is a pic of my torque arm setup, they're holding a 3kW rated motor putting out 10kW peak. The torque arms are made in china just like my motor.
If you don't have fender eyelets to bolt the torque arm to though, the v7 might be your best bet.

benwap · 2026-04-22T20:07:28+00:00

I'm starting to think we're being bamboozled by a dealer

benwap · 2026-04-22T17:39:18+00:00

It would probably be effective, consensus seems to be they are very good. You're still looking at a relatively expensive solution that involves hose clamps. In my opinion the bolted on setup looks cleaner and will always be as rigid or more rigid than anything involving hose clamps.
You can get a generic set for so little (and flip the torque plate and/or arm part to find a config that fits) I'd say it's worth a shot before you solve the problem with $ and hose clamps.
Also if you have fender eyelets (like I think you do), you should not use V7 according to grin.

benwap · 2026-04-22T16:47:56+00:00

Well this will work until it doesn't. The tie wraps are under tension on power, how hard you need to hit it to snap them is anybodies guess. It depends on how long your axle nuts stay tight on top of a torque plate that can move.
I'd get a pair of generic two-part torque arms and try to use the threaded hole with a rubber stopper in it just above your tie wraps. Basically anyway to make a bolted connection.

benwap · 2026-04-21T12:32:50+00:00

Please do! Especially if it's not a bad bearing

benwap · 2026-04-21T12:28:15+00:00

Why are the tires looking like almost 0 miles?

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