GNG, 1000W 48V BB-drive, $400

http://e-bike-diffusion.com/index.php?module=produit&prd_id=520&url_retour=http%253A%252F%252Fe-bike-diffusion.com%253A80%252Findex.php%253Fmodule%253Dcategorie%2526code_cat%253D24%2526page_start_num%253D1

They also have a GNG style big block for 100€
 
bee said:
Has anyone found a source for the fanphy freewheels, or maybe a stronger alternative? Seems like GNG found a cheaper version to put on their newest kits.

This one looks similar: http://www.aliexpress.com/item/PARIS-STYLE-High-quality-round-great-wall-12-12t-single-12-m18-inside-diameter-bicycle-accessories/1157753537.html

I'm thinking I should just go with the 13t ACS freewheel upgrade, this is the proper adapter, right?

http://www.staton-inc.com/store/products/11_mm_ID_with_4_mm_key_way_Adapter_for_freewheel_sprocket_13_14_15_tooth_30_mm_x_1_0_OD-1860-73.html
Click to expand...

I've been loving my 2nd* 13T ACS on my Stanton Adapter. Stanton also makes an aluminum one if you're concerned about the weight. Also, the steel one you linked does rust. I'd paint the exposed parts of the flange or something. Right now, I usually just wipe it off, then put a thin layer of grease on it. Silicone spray doesn't protect it as well.

* 1st ACS 13T freewheel started taking itself apart. The Bikemotive adapter wouldn't spin the freewheel true after the retaining ring came off and the omega replacement ring started wanting to come off. I decided to just get another 13T in lieu of rebuilding my first one.
 
bzhwindtalker said:
Ive been quoted 135$ (without shipping, taxes and import duties) for big blocks style with 55mm stator. How wide are the GNG type big blocks stators?
Click to expand...

Where is the motor shipping from? I've realized that I can't ship motors outside of the US at a decent price unless I have a cargo container of them slow boated over.

I haven't cracked the case open on the big block that I have yet. I have to in order to machine the spindle. When I do I'll weigh it and take some measurements.
 
Picked up a gear puller and quickly turned the butter soft jackshaft spindle on the new chain drive kits to this:



Whoops. I stuck the 'nut' back in the hole and tried again, this time it finally came off:



I cleaned up my mess with a dremel and pulled out the new set of taps that I have wanted to try out, and thankfully there are enough leftover threads that it should all screw back together:



Not really sure what happened here but my keyway is looking really ugly, it has been widened from the torque of the motor and has changed the shape of the shaft a bit which is why I guess it was so stuck.



Some pics of the new style freewheel adapter:





It is still a 11mm shaft with 4mm keyway, and it's 10mm long so the staton adapter should work ok. After the 10mm section, there is a ridge and the adapter shaft opens up to 12mm to accommodate the nut that keeps it in place. Not sure why this was redesigned, it doesn't seem any stronger than the original jackshaft and is just more difficult to disassemble.
 
LightningRods said:
One setback today. I just saw that Mister Tao had "refunded" my order for 10 GNG spec motors. I PMed them asking for an explanation but have not heard back. There are great deals to be had in China but the waters are treacherous and deep. My order for three 404 big blocks is still processing.
!
Click to expand...

That is exactly what they did to me when I ordered my big block, refund my payment into "their" account rather than refund to my Visa. Earn interest on my money for a few weeks then rebill me with a few unexpected charges and ship me an obviously used motor. Still at $167.92 all up for the motor and shipping it is hard to be too disappointed. The plan is a direct drive without any intermediate reduction, I'm sure this monster will make enough torque to do the job.
 
kiwifiat said:
That is exactly what they did to me when I ordered my big block, refund my payment into "their" account rather than refund to my Visa. Earn interest on my money for a few weeks then rebill me with a few unexpected charges and ship me an obviously used motor. Still at $167.92 all up for the motor and shipping it is hard to be too disappointed. The plan is a direct drive without any intermediate reduction, I'm sure this monster will make enough torque to do the job.
Click to expand...

At least you got a good price on shipping. The total to the west coast of the US is just under $200 US. I have three more motors coming from the same vendor this next week. It will be interesting to see if any of mine look used as yours did. The first one I ordered arrived very dirty but with no signs of having been used at all. All of the vendors on TaoBao lie about how much inventory they have.

I will be cutting and machining the motor spindles for the four big blocks that I have if you want to send yours down. It has to be annealed, cut, machined and then rehardened. Easier and more economical to do in batches. I also have six small block spindles that I'm going to rework. Several of those will be available for sale after they're done. You can replace a GNG spindle to get rid of the junk driver pulley or one of the Mister Tao helical gear versions.
 
LightningRods said:
I will be cutting and machining the motor spindles for the four big blocks that I have if you want to send yours down. It has to be annealed, cut, machined and then rehardened. Easier and more economical to do in batches. I also have six small block spindles that I'm going to rework. Several of those will be available for sale after they're done. You can replace a GNG spindle to get rid of the junk driver pulley or one of the Mister Tao helical gear versions.
Click to expand...

It makes a lot of sense doing a batch, I will send mine off as soon as I am able to pull the motor apart. It would make sense to replace the fan on the end with something better and I am going to put some venting holes in end plates. Given the 3-4 Kw peak some users are getting out of the smaller GNG motors does any one have an estimate on what we might get out of this 5kg beast?
 
Good 'today I made several tests with my big blok of 580W motor wires touched the green engine with the blue controller motor controller controller with green and yellow with green motor controller and the motor rotation enverti am thinking directly connect the pedal but the connection made ​​power meter motor made ​​over energia1900w only half throttle normal when connected only makes the controller 1000w KURT151 colors with colors only makes 147w with the throttle all without mechanical load, I'm thinking machines the shaft and put a kart clutch with 12 teeth and connect directly to the pedals, my question is whether the controller or motor can burn up having everted cables so I netei that the power increase much above about 11 times was normal when connected?
 

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Muapeia said:
Good 'today I made several tests with my big blok of 580W motor wires touched the green engine with the blue controller motor controller controller with green and yellow with green motor controller and the motor rotation enverti am thinking directly connect the pedal but the connection made ​​power meter motor made ​​over energia1900w only half throttle normal when connected only makes the controller 1000w KURT151 colors with colors only makes 147w with the throttle all without mechanical load, I'm thinking machines the shaft and put a kart clutch with 12 teeth and connect directly to the pedals, my question is whether the controller or motor can burn up having everted cables so I netei that the power increase much above about 11 times was normal when connected?
Click to expand...

Hello Antonio!

Antonio here is the reason that we all know about the existence of the big block motors. He ordered a '500 watt' motor off of Mister Tao and was sent a wide case 580 watt motor. I did some more digging based on his information and found the 1,100 watt motor. :mrgreen:

Antonio, I'm hesitant to express an opinion about electrical components here because there are so many people more knowledgeable than I am on this forum. But as I understand it, if you get the phase power supply wires and hall sensor wires in the correct sequence the motor will reverse direction. It shouldn't cause any additional heat. If anyone else knows more on this subject please chime in.

Com os melhores cumprimentos.
Mike
 
hello every one- great thread! I am in between assignments and so have had the time to read this entire thread. it's been like a time machine 14+ months in 5 day's what a ride.
regarding the fan cooled big block, the straight bladed fan is the correct design. curved blades are for overcoming intake or exhaust restrictions. forward leaning blades usually very short and on the outer edge of the wheel are much quieter but can not overcome much restriction. look at top quality brands like Baldor you'll see the same designs there.
also the black plastic cover directs the cooling air to the correct place on the motor. the outer perimeter where the ribs are is the heat sink for a motor like this. the outer windings are where the bulk of the heat originates, from there it migrates out through the outer peripheral heat sink. very little heat gets to the end plates unless the motor is really maxed out past its intended output. the end plates mainly cool the bearings.
I know the added length to the heat sink makes it longer than if it were only as much longer as the windings are wider. but if you plan on lots of amps at lower rpm's that extra length will make a good bit more cooling happen.

lightingrods,
what was the total cost for the thee motors from mr.tao is this the correct link ? http://www.mistertao.com/beta/pages/item/16360173272.html

I need thee of these but am in no rush. if you still think you might try to get 20 or so. I will wait for that. pm me I will pay-pal you some $$ to help with the funding. hopefully some others will do the same then you will not have to stick your neck out by your self. the slow boat rushes for no man. we can take the gamble with you. if we get he shaft we'll get it together.

have you checked to see if the whole shaft on these motors is heat treated ? I have found some Chinese motors only have heat treat on the drive gear itself.
mark
 
So I am having a worse time than usual with Mister Tao:
NoSale.jpg

Two different vendors, neither one had the motors they advertised. The one for $33 says they have 4,545 available. The one for $42.90 says they 9,933 available. Since they couldn't produce 4 or 10 motors respectively when offered cash, I suspect that they were fudging their numbers.

I did successfully order 3 big blocks. They are on their way to me. I also have an order in for a stock GNG belt drive on Mister Tao for electricbike.com to do a comparison test against my scratch built. Hopefully that will come through or I'll have to pay full pop at GNG. The big blocks end up being about $195 delivered to the west coast of the US. The link above is the one I have been using to buy big blocks.

I'm contacting a couple of companies that I sniffed out that have these motors. I'm planning to do a less than container load sea shipment. I still don't know what their minimum order is or what the final cost will be. I have to get motors in order to sell the complete kit.

About a week to go on the wait for the freewheel to 12mm adapter. I bought a freewheel to 11mm adapter from Staton (really nice people) that I hoped I might bore out to tide us over. It fits the freewheel threads but it doesn't have the correct offset to allow the pulley to clear the motor. That's the problem with these parts right now. There are no standards so nothing fits.

Welcome to the forum Mark. I'll see if I can swing the financing on this by myself. Business has really picked up the second half of this year. If I come up short I'll pass the hat. People are pretty quick to step up here.
 
--freeride-- said:
The Cyclone 6KW Motor could be the the Bigblock even more big right?
Click to expand...

I like Paco. He's a good guy to work with and the ISIS BB he sells is first rate. I think this monster motor kit of his is kind of nuts.

Cyclone-2400W-BB.jpg
 
LightningRods said:
--freeride-- said:
The Cyclone 6KW Motor could be the the Bigblock even more big right?
Click to expand...

I like Paco. He's a good guy to work with and the ISIS BB he sells is first rate. I think this monster motor kit of his is kind of nuts.

Cyclone-2400W-BB.jpg
Click to expand...

+1

That extension tube is crazy. Maybe it'll fit normal on a fat tire bike. :lol:
 
skyungjae said:
That extension tube is crazy. Maybe it'll fit normal on a fat tire bike. :lol:
Click to expand...

You have to give Paco credit. He's not going to let a little thing like the motor not fitting the frame stop him. :p

Here's a photo of what I ran into with the Staton freewheel adapter. It's the correct 1.375"-24tpi thread which the GNG adapter on the left is not. You can see the smaller 11mm bore. The problem with using this adapter on a GNG is the missing extension on the back of the hub. It throws the offset on the driven pulley off by about 8mm which effectively puts the pulley inside of the motor case.

GNG_Staton_1.37_Adapt.jpg


The adapters I'm having made should be ready to ship in less than a week. Thanks for being patient while I have these custom made. I just couldn't find an off the shelf solution anywhere.
 
Hello Mike, thanks for your opinion, I'll even contriving to connect 12T axle and connect directly to the quarry with a kart with a 82T 219 chain joining a rear wheel hub hub Shimano 8-speed internal, I hope it will be able to run close 40 miles beyond the torque rises will only use your adjustable low motor adaptations would be nice if Mike start making some for my big blok is 92.49 mm wide :D
 
Muapeia said:
Hello Mike, thanks for your opinion, I'll even contriving to connect 12T axle and connect directly to the quarry with a kart with a 82T 219 chain joining a rear wheel hub hub Shimano 8-speed internal, I hope it will be able to run close 40 miles beyond the torque rises will only use your adjustable low motor adaptations would be nice if Mike start making some for my big blok is 92.49 mm wide :D
Click to expand...

Antonio- I'll be interested to hear how that Shimano internally geared hub stands up to the torque of your big block motor. I keep hearing that the IGH can't stand much over 1kw.

I should post some of the photos Antonio has been sending me of his bikes, or he should. He has a collection of really cool full suspension off road bikes.

92.49 mm wide huh? That's all I need, another size of motor to deal with. :D Let's see, we have 68, 73, 83 and 100 mm BBs, and people want me to make brackets to fit 68, 71, 92.5 and 103 mm motors to all of those BB sizes. Maybe Jon had the right idea. "You can have any size you want, as long as it's 68 mm."
 
I meant this Motor not the 2400W one:
6kwc.jpg


That looks similar to the GNG just much wider.
Those kits are all nuts and there is one reduction stage missing...

@LightningRods: I got a shimano Alfine 11 IGH on a 300W Motor, that is not much fun to ride. I don't like IGHs a lot... the 7 or 8 speed version should be better but I still don't like it...
 
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