Much More Powerful Pie Now!!!

[o00scorpion00o]

HAHA

All you crazy power hungry Bikers 

Top speed on 16S LiPo on a test run yesterday was 41 mph absolute mas, average 35-38 mph! LOL

[MonkeyMagic]

Tasty!!

Hey are you going to put bigger brake rotors on? You could get bracket adapters cheap off ebay

I hope I don't get attacked by a MAC lol

[o00scorpion00o]

hi monkey.

Yeah I probably could. But I pedal a lot so I usually don't go near those speeds.

Really I open it up for a mlie or two. On the good road before I turn off for the bad road again.

The rotors  are fine for that.

The headset and shocks need to be replaced but I can't spend the money this year, maybe next year or I might look out for a better quality second hand bike.

[MonkeyMagic]

The headset and shocks need to be replaced but I can't spend the money this year, maybe next year or I might look out for a better quality second hand bike.

That's 'cos you spent all ya money on LIPOOOOOOOOOOOOOO !!!

[o00scorpion00o]

That's 'cos you spent all ya money on LIPOOOOOOOOOOOOOO !!!

Haha yeah and the charger!

Though the LiPo itself isn't too expensive, the initial purchase of LiPo, charger and power supply adds up, but it's cheap then to add extra packs in the future or swap dead or faulty packs.

I miss the simplicity of bms charging and discharging. And the peace of mind in leaving LiFePO4 in the house. I store my LiPo in the shed!

LiPo is definitely not for the ordinary man. I just long for the day batteries weigh a lot less.

What I may look out for is a meanwell to bulk charge my battery without having to split up the pack to charge. It never goes out of balance if you charge to 4.15 volts and discharge to 3.5 volts. I always leave 1-2 ah just to make sure the cells stay in balance.

It would be nice if they made a battery that you could charge and discharge completely without monitoring or bms or risk of damage!

[MonkeyMagic]

Yeah as long as you monitor them they are excellent for the $

And you only really need to balance charge them every few months or so, you will be fine charging them in series.

Although I've been maintaining my batteries, I'm still a bit unsure how they will perform once I get my bike back on the road. It's taking forever!!! Lol but small progress is better than none....

At least you are riding yours lol

[o00scorpion00o]

Yeah Monkey,

I got my bike on the road because I'm not building a spaceship! LOL

It's going to be super when you get it running though! 

[MonkeyMagic]

Well it wasn't planned.... Put it that way lol

It will be a real definition of an e-bike 'build' though

I'm slowly but surely progressing with the wiring. But see even while doing the wiring I had ideas haha I'll post them up with my build post

And I have a secret mod up my sleeve too....

[o00scorpion00o]

Lol can't wait Monkey you crazy man!


I bet 40 mph on your bike would be a lot nicer lower down!

[DirtyGinge]

ssshhh, don't let GM see this 

rewired my mac with 12G alphawire, upgraded to the compound gears...set the controller to 120%, 25 amps.......that little mutha carried me to 39 MPH on the flat.....coincidentaly I forgot to disable cruise, and my friend  tried the bike..( I havent fitted ebrakes on it yet)...he locked it from about 20MPH down to 0, not realising that cruise was locked on......motor shuddered to a standstill hopping everywhere ( with controller at 30 amps)...4 seconds before controller shutdown.....no damage whatsoever to the compound gears......they got my vote....

Will re-wire this motor shortly with much thicker phase windings.....

[o00scorpion00o]

hey ginge.

you should try 40 amp battery and 90 phase 

[johan_heyrman]

I'm tempted to do some McShunting... But I have a sneaky 'soft' mod I wan't to try first..... Details updated here!!

I'm curious about that soft mod, could you share more information please.

[JS]

Almost didn't find this, since it isn't in the Magic Pie-section... anyway, I saw some helpful pictures in this thread and I think I have a pretty good idea what to do, but just in case I'll confirm it with the Masters 
Here's a picture of my MP2, which I'm not entirely satisfied about. It's definitely the tamed 700-800W version. Just a few hundred watts more might do it.
Battery is 48V LiFePo4 2C, so there's plenty of power available for the Pie.

Questions:
(A) is the shunt loop that's essentially a current constrictor, or resistor whatever?
(B) is the shortcut I should solder on?  Or just make (A) stronger with a parallel wire?
Any sense in strengthening (C)?

[JS]

Ok, the deed is done. Now it has POWER, maybe even too much, we'll see. I'll try to use it sparingly

[MonkeyMagic]

You should probably buy an egg timer too, so you can measure how long it lasts hehe

Good work on the mod, is your bike making wheelies now?