Search found 1243 matches

by brumbrum
Jan 06 2019 4:11am
Forum: E-Bike General Discussion
Topic: 200a Breaker Switch.
Replies: 12
Views: 249

Re: 200a Breaker Switch.

Any ideas guys on a shop I can find me a 200a breaker for my build please? Already have a 125a but my battery build should be good for 200a burst so want all I can get from it. Any help would be good help😁 Try out the 125a breaker first. You will probably find it will be ok. If you were drawing a c...
by brumbrum
Jan 04 2019 3:21am
Forum: E-Bike General Discussion
Topic: Need help picking ebike for 60-something Dad
Replies: 9
Views: 281

Re: Need help picking ebike for 60-something Dad

The specialized turbo levo is the must have emtb at the moment for sure. The new 2019 model has had a big overhaul and redesign from previous versions, so it maybe worth paying a little extra and getting this model rather than the 2018. Just buy the cheapest version and upgrade later if ever needed ...
by brumbrum
Dec 29 2018 1:16pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Andrew's LMX 161 Chain-drive massacre Build Log
Replies: 74
Views: 3843

Re: Andrew's LMX 161 Chain-drive massacre Build Log

Regnardin wrote:
Dec 29 2018 1:08pm
I have already contacted the support but no news! :?
It reminds me of the ignition wire you get on Lyen/infineon controllers.
by brumbrum
Dec 28 2018 6:35am
Forum: E-Bike Build Threads / Photos & Video
Topic: Andrew's LMX 161 Chain-drive massacre Build Log
Replies: 74
Views: 3843

Re: Andrew's LMX 161 Chain-drive massacre Build Log

maitilupas wrote:
Dec 28 2018 3:39am
is that a circuit breaker and a shunt? in my shunt i use the negative not the positive and than connect the positive iginition ( 7 in case is kelly) also to the shunt
Maybe it is? I thought it was a circuit breaker with a pre-charge resistor built in.
by brumbrum
Dec 28 2018 2:47am
Forum: E-Bike Build Threads / Photos & Video
Topic: Andrew's LMX 161 Chain-drive massacre Build Log
Replies: 74
Views: 3843

Re: Andrew's LMX 161 Chain-drive massacre Build Log

Hello to you, I wanted to follow this pattern but unfortunately the result is not conclusive. Can you help me using my schema? I would be very grateful to you! http://image.noelshack.com/fichiers/2018/52/4/1545937128-wiring.png Have you tried measuring voltage across the various parts of your circu...
by brumbrum
Dec 19 2018 2:57am
Forum: E-Bike Non-hub Motor Drives
Topic: LMX 64 : Freeride Ebike with dual drive and torque sensor
Replies: 80
Views: 5465

Re: LMX 64 : Freeride Ebike with dual drive and torque sensor

Well done guys. The lower the noise - the more the customer.., simples! Less noise on chain drive systems is the holy grail in RnD.

Thanks for the updates :D
by brumbrum
Dec 12 2018 3:08pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3014
Views: 176347

Re: Sur-Ron - New Mid drive Bike

Chainsaw oil :wink:
by brumbrum
Dec 08 2018 3:15pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3014
Views: 176347

Re: Sur-Ron - New Mid drive Bike

Qulbix Q76R looks much better than Sur-Ron :D :D Looks like it costs nearly twice as much as a Sur-Ron (177%), has a smaller capacity battery, and a hub motor. Not to mention the Sur-Ron's forged frame looks infinitely more professional. I doubt that. It was self built. Quilbix frames are excellent...
by brumbrum
Dec 08 2018 12:25pm
Forum: Battery Technology
Topic: Tested my Panasonic cells (Opus), unsure of results
Replies: 8
Views: 323

Re: Tested my Panasonic cells (Opus), unsure of results

The cells need to be warm to get the best out of them. I am pretty sure that internal resistance will be a lot higher in cold temp. I found that my samsung 30Q cells give much less capacity when cold.

Also if the cells are new, i would cycle rhem a few rimes before testing
by brumbrum
Dec 05 2018 2:45am
Forum: E-Bike General Discussion
Topic: Qulbix Q140MD - any experience?
Replies: 64
Views: 1922

Re: Qulbix Q140MD - any experience?

You have chosen well. Great bike. Solid parts. Excellent set-up. 8)
by brumbrum
Nov 29 2018 3:51pm
Forum: E-Bike General Discussion
Topic: Qulbix Q140MD - any experience?
Replies: 64
Views: 1922

Re: Qulbix Q140MD - any experience?

Glad to hear the Q76 frame has held up well! I looked at the Vortex too, but it just looks too much like a motocross bike to be able to ride it without any hassle here I think. Performance should be similar though, and I'm hoping the Q140MD will feel natural to pedal on rather than relying 100% on ...
by brumbrum
Nov 25 2018 3:58pm
Forum: E-Bike General Discussion
Topic: Battery Fire.
Replies: 39
Views: 1631

Re: Battery Fire.

Its very weird why the video footage is edited at 3.14. You see a charging cable at 3.13 and then there's a little blip and it's gone. Why would they want to edit out the fact it was charging?
by brumbrum
Nov 23 2018 11:35am
Forum: Motor Technology
Topic: wich choice motor qs273
Replies: 5
Views: 330

Re: wich choice motor qs273

The lower the turn count the higher the rpm. The motor will spin more times per volt
by brumbrum
Nov 14 2018 2:25am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 345
Views: 26190

Re: Nucular electronics - complete kit for ev! [beta]

Give the guy a chance, Haah! The solder has barely had time to cool on the very first board. Ha! TAKE MY MONEY NOW!!! OK...no not really...this controller needs some vetting yet. But I am quite interested!!! My hope is it can do 150 volts. I'm willing to sacrifice some of those crazy 500 phase amps...
by brumbrum
Nov 13 2018 4:16pm
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 345
Views: 26190

Re: Nucular electronics - complete kit for ev! [beta]

Give the guy a chance, Haah! The solder has barely had time to cool on the very first board.

Some lovely torque. How much sag you getting on your pack. Just wondering what it takes to get to 60kph
by brumbrum
Nov 12 2018 12:59pm
Forum: Battery Technology
Topic: Best battery Deals on 11 11 Chinese sale!?
Replies: 9
Views: 669

Re: Best battery Deals on 11 11 Chinese sale!?

no one? .... considering people always looking for cheap batteries and deals on here i thought there would be a little more action... these don't look bad https://www.aliexpress.com/item/100-Original-LiitoKala-Lii-35A-3-7V-3500mAh-NCR18650GA-10A-Discharging-Rechargeable-Batteries-For-Sanyo/32823361...
by brumbrum
Nov 05 2018 2:42am
Forum: Battery Technology
Topic: Samsung 25R Internal Resistance
Replies: 19
Views: 664

Re: Samsung 25R Internal Resistance

I have few new cells from nkon here. Some after few cycles. Samsug 25R shows 11,5 miliohms AC and 18 miliohms DC at 4,08 V. Sanyo GA shows 20,4 (24 new) miliohms AC and 35 miliohms DC at 4,08 V. Temperature during measurement cca 25 C Sanyo GA cells in my one year old battery 10s5p are about 38 mil...
by brumbrum
Nov 02 2018 4:52am
Forum: Battery Technology
Topic: Samsung 25R Internal Resistance
Replies: 19
Views: 664

Re: Samsung 25R Internal Resistance

If I remember correctly, it takes a few cycles for a brand new cell to achieve it's best IR (and capacity), so that might be why you could see a used cell with lower IR than a new cell. Have to agree. I was first dissapointed when building a 20s 27ah samsung 30Q pack. First 3 cycles gave higher sag...
by brumbrum
Oct 28 2018 2:11am
Forum: E-Bike Non-hub Motor Drives
Topic: LMX P2 : Freeride trials motorcycle frame development
Replies: 990
Views: 172878

Re: LMX P2 : Freeride trials motorcycle frame development

#219 chain should be plenty strong enough :thumb:
by brumbrum
Oct 26 2018 1:32am
Forum: E-Bike Non-hub Motor Drives
Topic: LMX P2 : Freeride trials motorcycle frame development
Replies: 990
Views: 172878

Re: LMX P2 : Freeride trials motorcycle frame development

Adam has ordered in some 14t sprockets for the lmx motor. I will be trying this soon with a 100t rear sprocket from eBay. This will give a slightly lower gearing ratio of approx 7.2:1 instead of the original 7.8:1 With the idea of reducing some noise from the original 12t front sprocket. The lmx161...
by brumbrum
Oct 25 2018 1:20pm
Forum: E-Bike General Discussion
Topic: Help magnets in hub motor
Replies: 21
Views: 688

Re: Help magnets in hub motor

Hi all, while I was replacing the hall effect sensors I damaged few magnets inside the stator. couldn't find an alternative! I believe they about 2.2 mm thick * 13.9mm wide *28mm long. Got N50 30mm x 10mm x 2mm from aliexpress that didn't work it's very weak compared with original one. any suggesti...
by brumbrum
Oct 25 2018 1:17pm
Forum: E-Bike General Discussion
Topic: Help magnets in hub motor
Replies: 21
Views: 688

Re: Help magnets in hub motor

Chalo wrote:
Oct 25 2018 11:54am
Are you sure your replacement magnets have their fields aligned the same as your old magnets?
This is possible but unlikely as they tend to repel each other when Sliding into place.
by brumbrum
Oct 25 2018 1:16pm
Forum: E-Bike General Discussion
Topic: Help magnets in hub motor
Replies: 21
Views: 688

Re: Help magnets in hub motor

Jonno wrote:
Oct 25 2018 12:27pm
Hi Doit,
I have some spare magnets (out of an scrap hub)
size approx 27 x 13.9 x 2.8mm
Have a re measure and I'll send you some if it helps.

Jonno

Just make sure they're in a large enough box not to get magnetized to the inside of a post office truck :wink:
by brumbrum
Oct 25 2018 8:48am
Forum: E-Bike Non-hub Motor Drives
Topic: LMX P2 : Freeride trials motorcycle frame development
Replies: 990
Views: 172878

Re: LMX P2 : Freeride trials motorcycle frame development

Adam has ordered in some 14t sprockets for the lmx motor. I will be trying this soon with a 100t rear sprocket from eBay. This will give a slightly lower gearing ratio of approx 7.2:1 instead of the original 7.8:1 With the idea of reducing some noise from the original 12t front sprocket. The lmx161 ...
by brumbrum
Oct 20 2018 10:09am
Forum: Motor Technology
Topic: Custom made #219 pitch sprockets?
Replies: 9
Views: 430

Re: Custom made #219 pitch sprockets?

DanGT86 wrote:
Oct 20 2018 9:53am
I have no international shipping experience whatsoever. How much do you think it would cost to have one sent from the middle of the US to you?
I'm in zip code 63116
Not much, If sent by normal airmail in a padded jiffy envelope. Probably only 10 or 15usd