Performances Magic Pie

[Denis]

Hi, I received my Magic Pie kit and I tested it with a 36V 9ah battery. I'm not happy at all about performances: 21km/h is the average speed on flat whithout pedalling. PAS don't work correctly: it assist with a lot of retard or don't assist at all. When you install PAS, to use thumb throttle, you must stop pedalling for at least 5 seconds before you could use thumb throttle.
The length of road test was 500 m, my weight 70kg. Did anybody have same performance with a 36V battery (declaration on GM site is 33km/h)? Mybe I did something wrong on connection, what I must verify?
I wrote an e-mail with these questions to GM, but nobody respond me  I would like to find a solution, I don't want to quarrel.
Thanks
Denis

[ggielen]

I assume you checked and the 33km/hr on the website corresponds with your wheel diameter? Of course if you take a smaller wheel + same rpm (which is more or less fixed), you will get less speed...

[Denis]

Thanks for your answer, I forgot, I mounted a 26'' whell, and on site is declared that a 26'' whell with a 36v battery could run at 33km/h

[muzza.au]

G'day Denis,

Others can correct me if I'm wrong, but I think the stated speed of 33km/h is the unloaded free spinning speed of the wheel. At 36v I think you should get to maybe 25km/h on a flat with a tail wind.

Muzza.au

[Denis]

In www.goldenmotor.com, Magic Pie page,  is reported,  under Magic Pie photo:

eBike Speed: 25kph/24V, 33kph/36V and 45kph/48V (Based on 26" rim, 80kg rider)

In any case I don't reach neither 25km/h     

I think I have the same problem as encountred with first release of Magic Pie

[Leslie]

Are your tires pumped up nice and hard and rim true with correctly adjusted brakes?

What is your input voltage by the meter?

Maybe a throttle error and the throttle hall outputting adequate voltage.  Test the throttle input and output.

I don't know as there is much I have to learn about the Pie but 21kph is dang slow, so slow old ladies could pedal faster and leave poor Denis in wind. 

[Denis]

Thank you for your answer, but I don't have a voltage meter. I use the battery with another e-bike (250watt motor) and average speed is 25 km/h. I tested the bike with both thumb throttle and twist throttle but nothing changed...
In any case tires are pumped up well and brake don't touch rims.

[Leslie]

You do need to test the voltage.

What type of battery is this?

On a small brushed E-bike 250 watt motor I can get 30 kph and around 27kph~29kph on my GM hub, so every 1.3 volt = approximately 1kph but not with every hub so this is just a ball park figure..

You can get a good voltmeter from the electronics store for very cheap as you only need it for easy to do testing.  It good to have all other possibilities out of the way before you can make an accurate assessment to what is wrong.

It does seem slow from what you are telling me here.

Just a little bit more info and more things can be discussed so you can work up to a putting a case together if and when you approach GM for tech support or replacement..

[Denis]

I'll will test battery voltage as soon as possible. The battery is a lithium (not lifepo4) 36v 9ah and it's new (only 3 months).

Anybody had problems with pas?

When I'll have result I'll post, thank you very much for all your help.

[GoldenMotor]

Please check your batteries. We can only assure you that speed with Goldenmotor batteries. Although it's embarrassing to say that our 36V Battery is actually higher than stated. Like what some people have found out, our 48V is actually 51V. However you can't blame us for doing this because we want to make the numbers look neat and it helps the customers to have a feel about how much power they are getting. We cannot write, 27.4V, 39.2V and 51.9V on the website, it looks weird. 

[Denis]

Thanks for your answer, I'll check battery and I think I'll buy your 48 battery. But what can you say about pas? It has a very strange behavior...

[GoldenMotor]

please tell us more about the behaviour so that we can find out.

[Denis]

This is what it happens: PAS assist with a lot of retard or don't assist at all. When you install PAS, if you want to use thumb throttle, you must stop pedalling for at least 5 seconds before you could use thumb throttle again.
Thanks for your answer.

[dutchcyclingman]

hallo denis

user manual copy over PAS function

the magicpei is using same controller as non pie motors  [am I right]

power on the pedalec by pressing the cruise control button twice 
power it of by cutting of the power supply 

wat I read about PAS its not working very nice
only full speed and trottle is not working
 

i am not using PAS at all 

[Denis]

I only mounted PAS and thumb throttle, not yet cruise control button. Really Pas don't work as I would like.