GoldenMotor Magic Pie.

[oldhaq]

Thanks for that, makes it clearer.
I'd have to agree with above post, 50km/h is probably a safe max for a 48v system user.
Any faster leave it to the overvolters. I'd like to delta a #2 though.
GM, I don't have an order in, so no need to cancel anything.

 

[GoldenMotor]

Yes. Type 2 are for overvolters. I don't know why they like it but i did a survey and found out that 18-25yr old males checked the "highest speed possible, preferrably the speed of light" box when they picked the top speed.

 

[Jerome Daoust]

Yes. Type 2 are for overvolters. I don't know why they like it but i did a survey and found out that 18-25yr old males checked the "highest speed possible, preferrably the speed of light" box when they picked the top speed.

Nice try to keep some confusion going, but it won't work: I'm sure you meant Type 3 or Generation 2.
It's commendable that you are able to please every group by making variations to one motor. Pie "à la carte"?

 

[jerseyebiker]

Any updates on the high rpm models? Anything at all would be great! What is your target rpm at what voltage ect....

 

[Dee Jay]

Hyena wrote:Leslie it doesnt draw much current, I was purposely trying to make it draw maximum current to see what it was capable of.
Cruising along it was only drawing 5-10a



Explains the 200 watt feel of it. The added torque on the start up must be a nice change for a gearless.

Is there a way to do the soldered-shunt mod to the internal controller to increase the amps ?

+J

 

[Hyena]

I'll let you know in a month or so :wink:

I suspect it'll work fine, but if you go heating up the controller too much the thermal protection will trip and it'll shut down.

 

[Dee Jay]

I'll let you know in a month or so :wink:

I suspect it'll work fine, but if you go heating up the controller too much the thermal protection will trip and it'll shut down.

Cool, thanks man.

I'm very interested in a torquey brushless gearless motor if GM can cut the noise down a bit.

Cheers

J+

 

[icecube57]

I would buy a Magic Pie if I could get a Mini Infineon Monster Inside the hub and swap out the stock controller. When the days comes for those controllers to go into mass production I would shove 100v down that pie faster than you could say greased lightning. My thing is if the stock GM was getting almost 35mph at 48v. How would this pie benefit me. I actually think the GM runs better at 48v than it does at the 86v-88v nominal Im pushing through it now. It took a while for the speed to top off but it was doing 30+ with my fat ass. The higher voltage just helps it get to the target speed quicker ..stay there without much sag in speed on varied terrain.. but a double in speed yeah...no load.. it barely came close... The only thing I saw double was WH consumption. My no load speed was 76mph or 122kph @ 98v. @ 48v Lifepo4 it was about 44mph or 70kph. My thing is if there is going to be a High Speed Over Voltage Pie... you better make damn sure that its atleast 80-85% EFF at 72v. The old GM dumps alot of heat and EFF can get as low as 30% at higher voltages. I understand they will be wound for speed and less torque.... I would almost try transplanting the high speed of the old gm with maybe one less turn in the windings...

 

[Jerome Daoust]

This guys looks happy after 500 km...

Kevin H, 2009/11/23[/url]"]I now have the MP for several weeks and I got 500km on the speedo.
It is amazing that this hub motor was so easily to install( I got no experience at all )
I drove an average of 38km/h with 43.2 top (no pedalling)
No overheating yet.

 

[Jerome Daoust]

20% off sale, Nov 26 2009 only. Here is says: "ON SALE TODAY ONLY!! The Magic Pie Conversion Kit No Battery"

Related discussion on GM forum

Just saw this and though it may not be too late for someone to catch the deal if they were already interested in this kit.

 

[Jerome Daoust]

I've been avoiding kits, but the more I see clean installations, the more tempted I become to also give it a try...
Magic-pie on Koga-Miyata

 

[karma]

if anyone ever opens there pie can you post pics please :wink:

 

[Russell]

Hyena already has, see here;

http://endless-sphere.com/forums/viewtopic.php?f=4&t=13662


-R

 

[karma]

thanks. wow that's a big stater. i wana bypass the controller and overvolt

 

[Hyena]

i wana bypass the controller and overvolt

I should have mine in a few weeks (organised a group buy with sea shipping that took ages) - gimme another few weeks to get sick of running it on 60v and maybe we'll see a 3kw magic pie

I'd like to try replacing the fets and caps on the exisitng controller first. Another thing which would be cool, and there's a bit of space in there to probably do it is star/delta wiring

 

[tapholov]

Hi,

I just got my Golden Pie friday. Bought it online, no problem. Had good communication with GM and the box came a week and a half later. I didn't pay any duty. I'm in Montreal, Canada.

Having bought other GM wheels from canadian ebay dealers, I was very impressed by the packaging, the inclusion of a waranty card and a manual that explains whatever we already know as to how to plug these things together. Very simple, very well done.

BTW, the red wire is the positive. No longer an issue.

Let's make a long story short. I was trying to build a dual currie motor e-bike with a NuVinci variable transmission rear hub. I found a frame, nice inverted forks and the usual accessories, installed the motors, had to buy a few controllers, blew batteries, rebuilt batteries and finally, I got a little depressed. The bike worked but needs a lot more attention to get it to beat my other triple-chain ebike and I'll probably have to ditch the whole NuVinci hub idea, all of which which would have cost money, so I bought the Magic Pie out of frustration.

This post is about the few problems I had with installation that might benefit the members of this forum.

The stupidest thing that's good and bad, but what can they do, is the lenght of the wires. They're plenty long, very long.

Upon installing the wheel however is where things went wrong. I screwed on my free-wheel, no problem, I screwed on a disc, no problem. Tried to put the wheel in place and it's a no go. There's a very important clearance problem with the brake caliper and I had to make myself a 5mm spacer to make the disk brake fit my Avid 3 set-up.

On the other side of things, the free-wheel was very much to the left side. I run a extra-wide bottom-bracket so that the pedals clear my battery set which is located in front of the frame. That was resolved by using the double-freewheel set-up that someone on this forum figured out. Thanks a lot.

So, here are the pictures of the mods and at this point, I'll still have to realign the rim about 5mm to the right so that the tire is centered within the frame.

I hope this helps. I haven't tried the bike yet since it snowed here yesterday, more snow to come tomorrow and my back is killing me right now. I have no doubt that I will like it.

Voila!

Tapholov

 

[Jerome Daoust]

Now available in a 16" wheel.

The speeds are correct: Yao Yuan's confirmation message

 

[Hyena]

In other pie news, it was mentioned on the GM forum that the extra currently unused yellow wire in the harness is actually for USB programming (when they add the feature later) Cool.

I should get my shipment of pies today or Monday. I had a small group buy so I went with the slow boat shipping method and it is indeed slow! Actually, the boat trip was relatively quick - it's been making it way from the dock and through customs etc for longer than it was on the sea!

 

[karma]

really

 

[JinbaIttai]

In other pie news, it was mentioned on the GM forum that the extra currently unused yellow wire in the harness is actually for USB programming (when they add the feature later)

I want to believe it, but won't until I see it. (Still waiting for the Nintendo 64DD to come out )

 

[Kaño]

Is there any news about the real speed of the magic pie at 48V or 60V?
Reports around this forum and GM forum are a bit confusing.

I want to go with a hub motor, instead of my Cyclone 500w, I want more speed (38 kmh is too slow for traffic), I want about 60 Kmh, or 38mph, is the Magic Pie capable of that speed?Or it is better to go with the GM 48v 1000w hub and the magic controller.
I’ve seen a good deal on ebay for that one, but if the Magic Pie is as fast as I want, I like it better as is finnier and has a larger diameter witch is suppose to give me more torque.

 

[Hyena]

I got mine 2 days ago and will do a review and video in a few days, but the short answer is no the magic pie won't do what you need. If you want those speeds you'll need the 1000w hub and a 72v battery and controller

On the GM forums one guy claims he got 46-48km/hr from the pie on 48v. What that actual voltage his pack was I don't know, but I got around those speeds from 58-59v (pack is 62.5v off the charge). I was expecting to hit 50 wth 60v but it fell just a little short. That's GPS recorded too, on flat ground and averaged going both ways

 

[mwkeefer]

hyena,

solder up the shunt... reterminate for delta 48kph becomes 83.04 kph @ 60v

-Mike

 

[tapholov]

Hi,

The streets are covered with snow here in Montreal but there was a nice evening when the temperature finally got up above the freezing mark.

I tried the GM magic pie at 53V and it barely went over the 40Km/h line. The acceleration was very smooth but short steep hills were definitively a challenge and I needed to pedal.

It's kind of hard to compare different motors but I would say that my old GM front hub at 53V (on a different bike) is a lot stronger and faster. It really wants to pull from under me and I still feel it pulling at higher speeds.

The Magic Pie doesn't seem to deliver the goods to those who want performance. It's a very nice package for a sunday ride.

The winter months will provide a lot of time for me to decide what I'll do with it.

P.S. for Kano, I hope you have a good frame (not a cheap donor bike) because you'll see that the world changes above 40 km/h and I strongly recommend dual-suspension above 50. It'll save you wheels.

 

[Kaño]

Well, after your review of the MagicPie low torque and final speed, and after reading Hyena and Icecube reports of how fast a GM hub heats, I have decided to upgrade my cyclone 500w kit, to the 1500W Cyclone motor I have. Just ordered a new controller from Paco.
My bike used to have a home made springer fork with a drum brake, but last week I upgraded it to a Hanebrink downhill fork, and replace the drum with an Avid Code5 four pistons caliper with a 203mm rotor.
So far I’m very happy with the results, lets see how it will handle the 1500W motor.