Finished building my 25mph Ebike - Page 2 - RC-Monster Forums

snellemin · 04.05.2011, 09:48 PM

This is my datalog from my commute after work.

J57ltr · 04.05.2011, 10:08 PM

Cool, it was a good ride home I bet. Did you use more mah on the way home?

Jeff

snellemin · 04.05.2011, 10:33 PM

No, It was a bit less actually. I didn't really start up from a stand still. By less I mean 100mah.

snellemin · 04.06.2011, 10:29 PM

This is from my ride home. Weather was a tad warmer and the wind behind my back. Dunno what happend really but I only used 2400mah in 7.5 miles.

snellemin · 04.23.2011, 03:00 PM

J57ltr made this torque arm for me.

Metallover · 04.23.2011, 08:30 PM

Looks beatiful! That bike should go strong now for a long time to come!

J57ltr · 04.25.2011, 12:44 AM

Hopefully the larger motor doesn't use a larger shaft, although I can remachine the slot. It would give me a chance to remove that area I mentioned before, and give it a conture.

I am bouncing back and forth thinking of this. I figure I can use the lower grade batteries and 4P. I sae your setup and an 800W and a 1000W. The 500 you have pushes me around pretty well. I was impressed.

Jeff

snellemin · 11:03 AM

That cheap Ebay kit is better than I thought it would be by a large margin. Awesome setup for those wanting to stay at the legal speed limit. I think the system is just rated for 500W to be considered legit. It actually pulls 700W continuous. It will probably be able to do more with the new controller and better motor wires. Might not even need a new hub after that.

I've learned one thing about lipo's in a Ebike vs Rc. Your batteries are depleted when the voltage reaches 3.7V per cell. Voltage under load is 3.95V per cell. Batteries stay in balance when I leave at least 20% capacity in there. I don't gain much more capacity when I charge to 4.1V per cell over 4.2V per cell.

JERRY2KONE · **Linky? -** 04.25.2011, 11:22 AM

Can you link this kit, and can one purchase it anywhere else besides ebay? I closed my ebay account a few years ago, and have no desire to open a new one. Too many dammed hassles selling stuff on there now with bigger fees plus more and more rules to deal with. I just can not be bothered with all that crapp. If there is a link for direct purshases from China I would be willing to work directly with them and leave out the middle man (ebay) and keep things simple. The way you did your conversion seems pretty straight forward, and making a locking plate is not that hard to get done just about anywhere. Plus using the A123 cells seems the best way to go as well. They are not expensive and easier to care for. So now that you have your conversion behind you now what do you recommend?

snellemin · 04.25.2011, 12:21 PM

The guy has a Ebay store and is based in California. http://stores.ebay.com/Xcceries-Stor...id=p4340.l2563

I'm gonna do A123's after my lipo' die. But I'll be going to the big prismatic cells or bigger cylindrical A123's. No point at this time to blow money on batteries, while I still have good ones that do the job.

On the forums I see people going gaga about using power poles. Deans just work fine for me.
I use 4mm bullets for my motor wires. Easy to disconnect when something happens. What is the point of having big connectors when I'm only flowing 15A continuous at most.
Getting a good tire for the supplied rim is a good idea. Tire that it came with is too skinny.
I set my suspension and seat position for comfort. I soften up the rear shocks. Lowered the seat post. Moved the seat back a bit.
Cruise control doesn't sound like a bad idea when going 2 miles straight. Holding the thumb throttle gets your hand tired.
Is good to have some type of logger to see your battery usage.
Throttle control gains range.
Hill climbing doesn't require gear changes anymore.
I don't have to wait in the back of the traffic line anymore. I scoot all the way to the front.
If you really want to pedal at top speed, I suggest getting a 11T sprocket.

For upgrades:
I ordered up the new speed control for a bit more power and ability to tweak the controller at will by the use of a pc.
Upgrading the motor wires when I get a chance.
A more powerfull hub for a greater top speed(not high on my list though).

JERRY2KONE · **Can you please? -** 04.25.2011, 03:34 PM

Hey Snell can you get a direct contact email address for these guys. Since I no longer have an ebay account I can not even send them and email from the site. I would like to contact them directly and see if there is another way to do business with them without using ebay. Maybe you can email them and ask if there is another way to communicate with them outside of ebay. Its worth a try. Thanks for the info and help Sir.

These E-bike projects are very inspiring and I would like to do one myself, but I do not want to end up spending $2000 trying to make something work. The drive distance from our house to the US Embassy is only about 5 miles, which is where I will be working starting June or July. Using public transport is OK at about $3. round trip, but with morning traffic it can take 30 to 60 minutes. By bike it can take less than 30 minutes and one can still arrive at work refreshed and ready to work without pouring of sweat. The biggest benefit would be at the end of the day not having to peddle my butt home, and still making it home in less than 30 minutes through rush hour traffic. A setup like this one would be a killer idea for my situation.

snellemin · 04.25.2011, 04:34 PM

The website is Yescomusa.com.

JERRY2KONE · 04:57 PM

Quote:

Originally Posted by snellemin

The website is Yescomusa.com.

Got it Snell. Thank you for the address. I will report whatever I come up with. Thanks.

Man this site is great. $289 for the complete package (48v 1000watts). Then all you need to do is fabricate a good battery pack and you are ready to rock and roll. Of course the reinforced hub lock piece woulb be a must have. But this site is great for anyone who is considering one of these projects. (http://www.yescomusa.com/product.php...&cat=91&page=1)

nis720 · 04.26.2011, 02:11 AM

Nice.... I want one now.

snellemin · 04.26.2011, 02:22 AM

Jerry, that is a best deal I found man. Also I plugged in a 16S lipo config and the ESC did not blow. My throttle lights went on, but the esc did not react when I hit the throttle. I plugged in the 14S setup and all is well again.

Thanks Nis720! This bike build pales in comparison to your sick 720. How have you been man?!

I've been messing with laptop batteries again for a milder ebike setup. Trying to build a 13s4p pack, which is around 8000mah. But cycling and weeding the bad cells out takes too damn long.