Search found 136 matches

by n2mb
Jan 15 2019 6:11pm
Forum: E-Bike Non-hub Motor Drives
Topic: GNG X1-pro 3000w
Replies: 186
Views: 13009

Re: GNG X1-pro 3000w

5kW on a mountain bike was a bit much for me in my last build. It was an accidental wheelie monster.

I have that now on my Sur Ron and it is much more manageable. 2-3 kW seems pretty good for a sub 50 lb mount bike.
by n2mb
Jan 15 2019 4:56pm
Forum: E-Bike Non-hub Motor Drives
Topic: GNG X1-pro 3000w
Replies: 186
Views: 13009

Re: GNG X1-pro 3000w

Torque should be pretty much set by the max current, if the gear reduction and motor winds are about the same. But, I don't see how it matters as much with a mid drive, since we can increase torque by changing gearing. Horsepower should matter more. I'm hoping I can put my bike in the lowest gear po...
by n2mb
Jan 09 2019 12:55pm
Forum: E-Bike Non-hub Motor Drives
Topic: GNG X1-pro 3000w
Replies: 186
Views: 13009

Re: GNG X1-pro 3000w

Yes; tried to avoid the brand because there are two Luna-haters who would denigrate them, me and/or the product. I weighed the battery, 1499 grams (3.3) pounds) AIR. Total weight of the GT Zaskar bike 10 pound BBS02 and battery about 34 pounds. Nice! My felt virtue one is 32 lbs as-is, so adding th...
by n2mb
Jan 09 2019 10:26am
Forum: E-Bike Non-hub Motor Drives
Topic: GNG X1-pro 3000w
Replies: 186
Views: 13009

Re: GNG X1-pro 3000w

A 52V, 6ah, 30q (14s, 2p) battery can power a 750w BBS02 for off road riding up to 20 miles with 2,000'+ climbing or 1000w rear hub (30 amp) system to 33 mph which it has done for the past year without any complaints. I know it's stressed beyond normal limits, but wanted to determine the capability...
by n2mb
Jan 08 2019 2:17pm
Forum: E-Bike Non-hub Motor Drives
Topic: GNG X1-pro 3000w
Replies: 186
Views: 13009

Re: GNG X1-pro 3000w

My bad for forgetting about that company :oops: That's gonna sag a lot on 3C ( 63A ), so hopefully you won't be pulling that continuous. I think if that pack had Samsung 25Rs in it instead, it'd be pretty ideal. Yeah, it sagged a bit, but didn't seem too bad. How would you draw 63A continuous? I on...
by n2mb
Jan 08 2019 1:46pm
Forum: E-Bike Non-hub Motor Drives
Topic: GNG X1-pro 3000w
Replies: 186
Views: 13009

Re: GNG X1-pro 3000w

Well, it's said to be a 3000w rated motor and GNG has stated conservative figures in the past. I think it's safe to assume it's really a 3000w drive. If you want to hit the 3000W mark with 65A.. a 52V battery is your best bet. Unfortunately you are going to have a hard time finding a battery with t...
by n2mb
Jan 08 2019 1:24pm
Forum: E-Bike Non-hub Motor Drives
Topic: GNG X1-pro 3000w
Replies: 186
Views: 13009

Re: GNG X1-pro 3000w

The BMS will do 50 amps continous, 70 amps peak. The cells will not. Look at the datasheet for the cells, and you will see what i mean. The GA is rated for 3C maximum continuous in a temperature controlled lab. Therefore, 3C is the absolute maximum in that situation - in an enclosed pack, much less...
by n2mb
Jan 08 2019 1:03pm
Forum: E-Bike Non-hub Motor Drives
Topic: GNG X1-pro 3000w
Replies: 186
Views: 13009

Re: GNG X1-pro 3000w

The 52v one will do 50a continuous 70 amps peak. I have to imagine that the current limit will be lower at 72 volts. 65 amps at 72 volts is 4700 watts. I think the motor is only rated at 3000 watts. I'm aiming to go Max of 35 miles per hour, so I probably only need 1100 to 1200 watts continuous. I w...
by n2mb
Jan 08 2019 12:22pm
Forum: E-Bike Non-hub Motor Drives
Topic: GNG X1-pro 3000w
Replies: 186
Views: 13009

Re: GNG X1-pro 3000w

Ok, just ordered a chain version. :flame: Want to have the option to mount it inside the frame. Had a long chat with them on FB, super nice help. The App looks very promising. 3 programmable ride options. Power/PAS/Throttle in any configuration. Very 25kmt/PAS only friendly. I have a 72v 25Ah batte...
by n2mb
Dec 20 2018 8:26pm
Forum: E-Bike Non-hub Motor Drives
Topic: GNG X1-pro 3000w
Replies: 186
Views: 13009

Re: GNG X1-pro 3000w

ScooterMan101 wrote:
Dec 20 2018 6:41pm
Which version of this motor will give the best top speed
The Geared or Chain Version ?

By about how much would you estimate ?

Which version would go up paved mountain roads faster ?
If they have the same reduction ratio, they will perform the same.
by n2mb
Dec 20 2018 9:45am
Forum: E-Bike Non-hub Motor Drives
Topic: GNG X1-pro 3000w
Replies: 186
Views: 13009

Re: GNG X1-pro 3000w

You think that would be a good idea if I'm only using it at 100 rpm at the crank? 120 rpm max? 12s would be perfect for those speeds. Even if I restricted the rpm that low on 20s, wouldn't I be better off going 12s in the long run? The size of the pack is for decent range at 35 mph, a typical cruis...
by n2mb
Dec 18 2018 10:22pm
Forum: E-Bike Non-hub Motor Drives
Topic: GNG X1-pro 3000w
Replies: 186
Views: 13009

Re: GNG X1-pro 3000w

Has anyone received their kit yet? Photos?
by n2mb
Dec 11 2018 12:05am
Forum: E-Bike Non-hub Motor Drives
Topic: GNG X1-pro 3000w
Replies: 186
Views: 13009

Re: GNG X1-pro 3000w

This looks great! But after reading the thread I still can't tell the difference between the gear and chain version. What's the pros and cons of each?
by n2mb
Dec 02 2018 11:58am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3048
Views: 180114

Re: Sur-Ron - New Mid drive Bike

How about putting a small 16s lipo pack in parallel with the main pack? You'd get ludicrous peak amps and a small increase in range. You might want to add another bms to balance the lipos, but it should otherwise be protected from overdischarge by being in parallel with the stock pack, as long as yo...
by n2mb
Nov 26 2018 11:08pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3048
Views: 180114

Re: Sur-Ron - New Mid drive Bike

Luna Cycle has the Sur-Ron X bike on sale for $500 off on Cyber Monday, and I'm thinking about getting one. Good deal! Though, as we are learning, there may not actually be much difference. Though, I think the quieter controller and smoother throttle response is worth $100 more. I'm not sure if tha...
by n2mb
Nov 26 2018 12:20pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3048
Views: 180114

Re: Sur-Ron - New Mid drive Bike

There's no Regen in the latest batch of x controllers. No speed increase as far as I can get. Exactly the same top speed, 42 MPH via GPS on both stock and the x controller.

What does your display indicate for top speed with the tire in the air? I get 52 MPH, so it could be power limited at top speed.
by n2mb
Nov 26 2018 10:05am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3048
Views: 180114

Re: Sur-Ron - New Mid drive Bike

I was able to do a quick ride between rain storms. Below are the CA screen shots. I started with a full pack, hot off the charger. At the end of the ride, the Sur-Ron battery meter was showing 45%. Ride was all sport mode and I took off hard at every stop. Sport Mode1 CA stats.jpg You can see the p...
by n2mb
Nov 24 2018 7:57pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3048
Views: 180114

Re: Sur-Ron - New Mid drive Bike

I just ordered 4 Zippy 2S 8ah batteries to parallel and series in to get some more volts with a stock setup. I am thinking that 2 batteries on each side of the battery pack in between the frame tubes. Maybe a plastic cover that holds 2 batteries on each side with the edges tucked inside the frame. ...
by n2mb
Nov 23 2018 9:03pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3048
Views: 180114

Re: Sur-Ron - New Mid drive Bike

Strava says I just did 50mph on a slight downhill with the 58t sprocket, 19x3.5 trials rear and 18s of multistars. Good fun but makes the stock pack less exciting. Here we go... stonezone tested 18s, but it doesn't seem like anyone tested 20s. It possibly won't work since someone mentioned they bel...
by n2mb
Nov 21 2018 1:04pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3048
Views: 180114

Re: Sur-Ron - New Mid drive Bike

Maybe 2 chains would be better. We don't know until someone measures the consumption of the motor alone. Belt drives can have quite high loss without load (around 3-4% maximum), but under load it usually outperforms the chaindrive. I don't know exactly why this is the case, but it might have someth...
by n2mb
Nov 21 2018 9:50am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3048
Views: 180114

Re: Sur-Ron - New Mid drive Bike

Hard take off (current limiting) I measured 77A. Maybe my controller is 'hotter' than normal? It is the older trapezoidal style. The current limit seems to be very precise and it stays there until the speed picks up enough for the current to drop. Yow! That could be why we're not feeling a huge inc...
by n2mb
Nov 21 2018 8:10am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3048
Views: 180114

Re: Sur-Ron - New Mid drive Bike

It would promptly set itself on fire as it would be discharging at a different rate. Not sure what you mean. It would discharge at the same amp rate since the lipo would be in series with the stock pack. It should work fine. You should use two 4s 16Ah lipos in parallel to try and match the capacity...
by n2mb
Nov 20 2018 8:48am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3048
Views: 180114

Re: Sur-Ron - New Mid drive Bike from China

Looks like Sur-Ron changed their 10A chargers. These are made to be mounted inside the bike, but works just as good as an external one. The 300A kelly on the left in comparison, and It is tempting to swap out original controller to it! IMG_4329.jpg Now, who want to see the battery? I got to tell yo...
by n2mb
Nov 19 2018 9:11am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3048
Views: 180114

Re: Sur-Ron - New Mid drive Bike

At the end of the day the pf is a budget cell......anything above 3A per cell will reduce the overall output significantly. What does the controller pull max? I saw someone post 65A stock and 83A with the X-controller. But, that is peak. Sustained current draw is much lower. From the datasheet, at ...
by n2mb
Nov 15 2018 4:47am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3048
Views: 180114

Re: Sur-Ron - New Mid drive Bike

Just this on the original test bike from Sur-ron #27. The production version was a 20% jump in power and the x-controller adds to that.sur-ron dyno.png I don't think the production bike could be higher than the HP reported there. Someone measured it as 65 amps peak from the battery, which optimisti...