What is the advantage to installing a speed chip Yamaha PW-SE
- Thread starter TWBiker
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Bicyclista
Well-Known Member
I installed a dongle from bikespeed.de, a German firm, on my 2016 Haibike AllMtn with a Yamaha PW motor. It was worked flawlessly all these years. I do not notice any difference in performance other than that I can exceed 20 mph with motor support. I cannot speak about other dongles, however.
Hello Bicyclista, I have wondered, when you say that you can exceed 20 mph and motor support will still active, is that on level ground, uphill or downhill? I can only get above 20 mph when I am going downhill. So I won't feel any difference when I am in the 15-18 mph range on a level road? Thanks for your information.
Bicyclista
Well-Known Member
Level ground and downhill, for sure. I think it would probably work uphill as well, but I don't think I have ever been able to pedal uphill at more than 20 m.p.h. Can you? What kind of dongle do you have? Is it a bikespeed?
Deacon Blues
Well-Known Member
A de-restrictor dongle allows you to ride at higher speeds (over the factory set limit) with the motor still applying power. It does not increase watt output or torque.
Mike TowpathTraveler
Well-Known Member
The speed chip allows the same level of assist to be outputed by the motor at speeds above 19mph, when the standard factory Yamaha setup would normally cut the motor assist out. This additional assist works whether on level, uphill or downhill conditions.
Still, to be at or above 20 requires your input on the pedals. It is no magic bullet of extra torque, it feels like a perfect extension to what the bike can do with assist up to 20 mph. And of course, anything above 16 mph or so results in draining the battery down quicker.
Haibike Full FatSix, with the PearTune chip, Yamaha PW drive.
Still, to be at or above 20 requires your input on the pedals. It is no magic bullet of extra torque, it feels like a perfect extension to what the bike can do with assist up to 20 mph. And of course, anything above 16 mph or so results in draining the battery down quicker.
Haibike Full FatSix, with the PearTune chip, Yamaha PW drive.
DaveMatthews
Well-Known Member
Does a derestrict consume more battery before reaching the normal/regular speed limit?
No. Just keeps on assistance after the speed limit.
Stefan Mikes
Gravel e-biker
- Region
- Europe
- City
- Mazovia, PL
I guess it might.
The derestrictor makes the e-bike "think" it moves at a lower speed than it actually does. Mid-drive motors are optimized for the low speed region, providing more assistance there. In general, the derestricted e-bike will provide more oomph, affecting the battery usage.
I can observe it with my derestricted Vado SL (25 km/h limit). No derestriction keeps me just above 20 km/h with assistance gradually dropping as the e-bike approaches 25 km/h (at low assistance). Derestricted, the same e-bike easily approaches 25 km/h with the same assistance level and the rider's leg input.
I could ride for 116 km on the restricted Vado SL with the main battery + Range Extender, 55% SL mode. I could never do the same after the derestriction.
DaveMatthews
Well-Known Member
That is the movie that was running in my head. Cheers.
Mike TowpathTraveler
Well-Known Member
In the times I have turned on the PearTune right outside my drive and before a long run of say, 30 miles; I have not noted any appreciable loss of battery capacity because of the destrictor.
I don't use the PearTune much at all. I consider it the real "Turbo" button to hit if I need to beat a weather front bearing down on me, etc.
In fact, most of my rides consist of average speeds over a 30 mile run at around 13 mph......
Stefan Mikes
Gravel e-biker
- Region
- Europe
- City
- Mazovia, PL
Mike, you can really notice that on real long rides.
I have just made a first test to confirm what I say: my night ride on a Vado SL was done with the 25 km/h restriction, and the SL assistance was 65/65%; the battery consumption was 3.51 Wh/km and the average speed was 18.6 km/h (the slowest ever recorded on that very segment!) The next morning, I will do another ride, the same route, the same assistance but I will derestrict the e-bike. As I can do very accurate measurements of the battery consumption, I will be able to come up with some hard data.
In my opinion, speed around 13 mph is not affected with any significant air drag. Let us see whether the e-bike tuning would really affect the average speed and the battery consumption!
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DaveMatthews
Well-Known Member
Interesting...
I'm guessing the trick would be to try and equal the previous pedal pressure/torque, and cadence? It occurs to me that a higher cadence/less pedal pressure would result in less battery consumption.
Stefan Mikes
Gravel e-biker
- Region
- Europe
- City
- Mazovia, PL
I basically ride the same style (especially on the same route), similar cadence, and my leg power output stays the same, as Wahoo/Strava confirm. My Strava of the tomorrow's morning will produce several metrics including the temperature and wind. Important: It is a loop ride so it is affected by the wind less.
Stefan Mikes
Gravel e-biker
- Region
- Europe
- City
- Mazovia, PL
As I thought.
Vado SL 4.0 EQ.
It is worthwile to notice I produced more leg power on the "derestricted" ride. The phenomenon is perfectly familiar to me: The more assistance you get on the mid-drive motor the harder you try as you enjoy the increased speed (and have to counter more of the rolling resistance and air drag). Still, the calories burnt on both rides were almost the same. The "restricted" ride battery consumption on the route was 27 Wh, and it was 34 Wh on the derestricted ride (26% more).
Vado SL 4.0 EQ.
It is worthwile to notice I produced more leg power on the "derestricted" ride. The phenomenon is perfectly familiar to me: The more assistance you get on the mid-drive motor the harder you try as you enjoy the increased speed (and have to counter more of the rolling resistance and air drag). Still, the calories burnt on both rides were almost the same. The "restricted" ride battery consumption on the route was 27 Wh, and it was 34 Wh on the derestricted ride (26% more).
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