Limits with MP3

[Garm@n]

Just curious how the commercial 16" wheel base ebikes runs faster then my GM_MP3 16" bike.  I've been riding around in my ebike and can't seem to go faster then 20km/h with my bike, but I'm running 36v, but presume that running on 48v get's me about 26km/h.  So what is emmo/daymak doing to get their bikes running at 32+ km/h on the same wheel size and heavier setup?  Is there any mods I can perform to bring up the speed?

[MelbourneRider]

Have you tried to re-program it?

here is a link for the settings from a previous thread:

http://goldenmotor.com/SMF/index.php?topic=4602.msg26553#msg26553

You can download the software from here:

http://www.goldenmotor.ca/pages/Downloads.html

But, you will need to have the USB programming cable

[Garm@n]

I have the cable and software.  Also I have looked into what Gary configured, but I don't think it does not apply to me as his example is based on a 26" wheel and I have a 16" wheel.

[Morgen 3Eman]

Hi Garmin,

Just for another data point, I'm using a 20" MP3 on 48VDC, and my Garmin says I top out at 25 MPH!  (Sorry Officer, it's only supposed to do 24mph)

TTFN,
Dennis

[MelbourneRider]

Gary was running 17 Amp continuous and 45 Amp max at 48 volt. That equals to 816 Watts continuous and over 2 KW max power. The speed was 32 KMH. He mentioned the total rolling weight was 450 to 500lbs. The wheels are 26 x 2.35.

I am assuming that your battery is the GM's 36 volt battery with 20 Amp continuous and 35 Amp discharge. A similar settings (48v changed to 36v) should give you 612 Watts continuous and 1.6 KW max power.

I think, that should be enough to give you over 25 km/h even on 16 inch wheels and say half the rolling weight

I would change the settings to go 20A continuous. That should give it a bit more oomph!

you can give it a shot

[MelbourneRider]

Forgot to mention, you can set the peak amp at 35A instead of 45A. That is assuming you are running the GM's 36v 20A(Cont) 35A(Max).

[Leslie]

There have been a few reports of experiencing more power on the 24v setting.

I confirmed Monkey Magic's claim a while back when we were experimenting with the old internal controllers.   

I cant say its the same for the new controllers, but I do believe the PWM is shifted when you change the program voltage settings, it must be to accommodate for the controller shunt resistance at the various voltage settings, in order to keep the current setting more accurate across all voltage selections.