This is the fate of B testers. But he rides very well
SZZS specific CEF50-main thread (initial builds and troubleshooting related only)
- Thread starter TCFlowClyde
- Start date
masahirov
New Member
Fate...If it's fate then there's nothing we can do but accept it.This is the fate of B testers. But he rides very well
Good morning everyone, I'm writing from the north east of Italy.
First I want to thank you for inspiring me in the creation of this beautiful bike, this is not the first build, as I already have experience with the Dengfu E09 and E10 frames.
I present to you with great pleasure the final result:
The weight of the bike is 18.3 kg with 480wh 48v battery
Daniele.
First I want to thank you for inspiring me in the creation of this beautiful bike, this is not the first build, as I already have experience with the Dengfu E09 and E10 frames.
I present to you with great pleasure the final result:
The weight of the bike is 18.3 kg with 480wh 48v battery
Daniele.
I will give you that if you are riding motor out of the design range then 48v is going to allow you to run more into the red zone. The M820 is a lightweight low power motor in anybody's book. Every other motor in the Bafang range has more power. The BBSHD is a 750w motor. It is all a matter of perspective.
I maintain that if you are using the bike the way Bafang designed it then you are not going to notice the difference.
Thought I would chime in to confirm this. My street commuter build is a bbshd with an aftermarket controller for easy tuning and more power. On 52v I would hit thermal rollback on my bike almost every ride. I built myself a 72v battery early this year for more range and power. Now I'm running the same amps (or roughly a 40% increase in watts!) and I've only hit that rollback a few times. The temp difference is massive, with a huge decrease going to 72v. Speak to anyone in the diy ebike community around going higher voltage and they will tell you the same thing.
I find it interesting bafang doesn't suggest a higher wh battery due to concerns about overheating, when on the hardware side they could have just installed a temp sensor and had power rollback when needed. It really should have one anyway (assuming it doesn't). I would love to hear from someone who's tested both a 36v and 48v m820 though. I'm actually a little confused about how bafang can claim the 85nm of torque for it even with the higher voltage offering which we know is the same hardware just different software with reduced peak amps. Seems like only the 36v system would peak that high. But this would directly affect torque produced, but shift the rpms to higher as well. One could just gear the bike slightly lower to compensate for this but then the cadence / where the power is would be different. Seems like the 36v could be the most punchy
TCFlowClyde
Active member
- Thread starter
- #4,026
Sounds like a YouTube Bafang challenge for Neeko to me.
Hey Bafang, ship Neeko DeVinchi both motors with appropriate batteries please.
Also, Neeko, can you some how get a infrared heat sensory set up on a drone too...you know in order to follow you up a climb for peak output at night?
Now that actually would be seriously cool!
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92se-r
New Member
Im in socal and i have an ir temp gun. Come visitSounds like a YouTube Bafang challenge for Neeko to me.
Hey Bafang, ship Neeko DeVinchi both motors with appropriate batteries please.
Also, Neeko, can you some how get a infrared heat sensory set up on a drone too...you know in order to follow you up a climb for peak output at night?
Now that actually would be seriously cool!
I never imagined myself riding an unknown brand bike , I own several big brands bike before n never been so satisfied with it. Most top 5 ews enduro model bike I basically own it once. Now with DH casing n ohlins 38 still under 20kg. My next conversion it's 165mm linkage..
Friuli-Venezia Giulia or Alto Adige?
TCFlowClyde
Active member
- Thread starter
- #4,030
Hells yeah!
That would be an awesome video adventure opportunity in some great weather. Could test it doing a stout shorter climb at Whiting Ranch/Laguna Hills, or bigger Santiago Canyon, or even the ultimate climb up the big San Juan trail epic all Orange County rides. Don't forget another lung buster Noble Canyon "near" San Diego. (Shoot, I'm getting homesick.)Point being, it would be a fun test in some challenging terrain. It would give Neeko's channel a wider viewer audience. Maybe, get Bafang sponsorship for Neeko (pay of the trip) to showcase the M820 riding in the huge market economy of California.
today was the first ride. the bike is great, the engine is amazing. I think the m820 is the best Bafang motor. enough power, minimal battery consumption.
I rode mostly T and S, S+ and for the test B a few meters on the climb. enough power on the climbs, only in B mode did the E09 drop out, maybe the firmware would solve that.
the engine has very good power modulation, it is not as smooth as Brose, Giant, Bosch, but it is excellent.
since I have an 11s 3p 17.5ah battery, on the first ride I had 100% left. means that the voltage did not drop below 42v during the 900-meter ascent (full battery before driving at 46.2v)
I rode mostly T and S, S+ and for the test B a few meters on the climb. enough power on the climbs, only in B mode did the E09 drop out, maybe the firmware would solve that.
the engine has very good power modulation, it is not as smooth as Brose, Giant, Bosch, but it is excellent.
since I have an 11s 3p 17.5ah battery, on the first ride I had 100% left. means that the voltage did not drop below 42v during the 900-meter ascent (full battery before driving at 46.2v)
92se-r
New Member
On the factory 36v battery, is it a 10s or 11s? I am wondering if it is power limiting you in boost. What bms do you have?
factory 36v is 10s. and it seems to me that it is the engine protection or maybe an error in the firmware. I'll try a few things and we'll see.
voigtkampff
Member
I also experienced E09 2 times so far. Both happened after steep ascent, 2nd time in B mode, soon after displayed battery level drop occured. I've checked a moment ago that upgrading firmware to version CRX30PC4813E102004.3 I got from Jean today didn't solve the battery level issue, dunno if this will help with E09. Bafang docs says "engine phase error, replace the engine". In my case E09 was displayed for like 1-2s on the screen and disappeared without my intervention, engine works like nothing happened.
so do I, it shows an error and after a few seconds it disappears and the engine starts working. probably some protection. did you ask about that mistake, where did you buy it?
My FW CRX30PC3615E102003.3
voigtkampff
Member
I have ongoing discussion about this issue with Jean, she forwarded this to technical staff and I'm awaiting their response. I need yet to see if the firmware she sent helped with E09, so far I didn't have a chance to put this into action.
please let me know if the new FW helped. thank you
Nice bro what bms u have there , any link
Thanks I will try to ask linda if she could integrate the smart BMS my friend battery, I am building another 4pc ohlins tune bike for my friend.
92se-r
New Member
Is that 3d printed? What material? Are you trying to tap and thread plastic?
kaylee.s
Member
I'm in socal too. Let's ride sometime!
No pic
Linda send that to me , all my new frame will be getting this bracket instead of aluminium bar.
TCFlowClyde
Active member
- Thread starter
- #4,049
Have a 3rd party make a carbon or aluminum custom one....then do a group buy to save money once they have the dimensions.
Here's one in the UK.
Rockguardz - handcrafted carbon fibre frameguards and mudguards
Handcrafted carbon fibre mountain bike frameguards and mudguards. Protecting great bikes from bad line choices since 2015.
rockguardz.com
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We need some materials which is safer then carbon else our frame screw or nut area will breakHave a 3rd party make a carbon or aluminum custom one....then do a group buy to save money once they have the dimensions.
Rockguardz - handcrafted carbon fibre frameguards and mudguards
Handcrafted carbon fibre mountain bike frameguards and mudguards. Protecting great bikes from bad line choices since 2015.
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