The most powerful hubmotored ebike on the planet

[MadRhino]

I think you stand 50% chances to win against Luke. You just need to wait for the fireworks, and finish the race.

Look at the nice racer pic I found, that was built on the same Fatboy frame as mine.
The guy is in California, maybe some here have seen it...

[John in CR]

I think you stand 50% chances to win against Luke. You just need to wait for the fireworks, and finish the race.

Look at the nice racer pic I found, that was built on the same Fatboy frame as mine.
The guy is in California, maybe some here have seen it...

Don't let him fool you, I think the pyro in him makes him do it on purpose. Plus it would be no fun to slaughter other electric bikes, just like I'd never mess with a cyclist while on my ebikes. The gloves are off for motos and cars...an even badly outclassed scooters when they have a stupid streak and think it might be close.

That's a slick looking race bike. I'm thinking hardtail is the way to go for the street. I had no real issues with my hardtail cargo bike of 3.5 years after I learned to never keep my spin straight.

John

[zombiess]

That's seriously awesome John. Are you still using the 36 fet Xie Chang controller? If so is that hacked programming software I sent you helping out? I've been considering posting it on here for others. Riding your bike on high power must be a lot of fun. The most I've experienced on my bike has been 14kw and that was amazing. In my videos I'm only running about 10kw and even that feels really quick.

Takes a while to find the right balance of phase vs battery amps to make these beasts ridable.

[Wizzbit]

Is there a way to work out an approximate horsepower from your watts?

[nieles]

746 watt is 1 horsepower

Is there a way to work out an approximate horsepower from your watts?

[Wizzbit]

746 watt is 1 horsepower

Is there a way to work out an approximate horsepower from your watts?

Thanks, I guess my kit has nearly 1hp then lol.

[John in CR]

That's seriously awesome John. Are you still using the 36 fet Xie Chang controller? If so is that hacked programming software I sent you helping out? I've been considering posting it on here for others. Riding your bike on high power must be a lot of fun. The most I've experienced on my bike has been 14kw and that was amazing. In my videos I'm only running about 10kw and even that feels really quick.

Takes a while to find the right balance of phase vs battery amps to make these beasts ridable.

Yep, the 36fet that SteveO built back when the 36fet boards first became available, and I couldn't have done it without your version of the program. Regen is almost too high already on the lowest setting, so further shunt mod was out of the question. The existing shunts put me at Actual-to-Programmed current of just over 2 to 1, so I need to set the battery amps to almost 200 in the program. The highest on the pgm version I had was only 100A, so your version gave me half of my current power.

What's the highest power you've actually seen on your display while riding? With those slower wind motors it takes some real effort to ensure that AMAX isn't just a 0rpm burp on the first rotation. I went on a 15 mile ride yesterday, and it took a few tries on a smooth deserted road to steal a glance at the CA at the right time, but I finally got to see 30kw flash on the screen as the motor crossed thru the peak power point. You skinny guys only need a bit more than 20kw to feel what I do at 30kw, so you might be able to get there, but it's a lot more likely with your 2 turn.

Keep in mind though, that I could feel the difference between 28kw and 30, so the motor has more to give. I stopped at 30kw out of worries about the controller. Maybe 40kw is the real number. I just need backup controllers before attempting any higher.

BTW, I can't wait to get one of the 6 phase high efficiency motors for testing. Apparently the largest is the size of Hubmonster, but with peak efficiency of 94%, and a slot count of just 24 it's going to be capable of much higher rpms. I just hope there's a work-around the factory controller, because it's limited to much lower power. This year is going to bring some cool changes to our hobby, and guys will be able to run real 10kw power without modding their motors. Hopefully controllers and batteries can keep up.

John

[zombiess]

John, if i set the amps to 120a then it draws 120a until I get into bemf which doesn't take long. The peak on the CA is something like 170a which I've never seen on the CA except the peak screen.

[John in CR]

John, if i set the amps to 120a then it draws 120a until I get into bemf which doesn't take long. The peak on the CA is something like 170a which I've never seen on the CA except the peak screen.

Unless your Block Time is doing it, then your programmed 120 is a real 170. Try dialing back the phase/battery relationship way back, and BT to the minimum 0.1sec . Maybe even start at 1:1 and work your way up. That's how I had to do it to get the bike manageable without giving up top speed. Once I found the right ratio, which was 1.3:1, then I ratcheted up the limits keeping the same relationship. By doing partial launches with the peak screen in view I could tell what was happening with current. With the settings I have now battery current jumps immediately to about 350A and climbs quickly until the motor reaches peak power rpm.

I'm at my limit on launch torque without flipping on my back. If I was into drag racing, then practice and body position I'm sure would enable me to dial up the phase/battery limits relationship up for somewhat harder launches, but it would be too dangerous for my errand riding. Your weight advantage means 20-30% less torque and power will net you the same experience, but your higher more rearward CG is gonna work against you. First, though you have to get rid of that 50A wasted burp of current that happens at or near 0 rpm. It creates heat for nothing, and in my case, I'm living out at the limits of the controller, so I need to know real numbers. Plus I insist on numbers I post being real, and you should congratulate yourself for saying 120A instead of 170A about yours. I just wish I had access to a dyno so I could post the actual output power too. All I have is an educated guess that it's 20-23kw, but however much it is, it's way into the FUN category for me.

Can you imagine having to settle on the 200-300 some politicians try to jam down people's throats in some parts of the world? I can't.

John

[zombiess]

I've never watched the peak number screen because I don't care about peak numbers. I never run more than 0.1s block time. When I ran 120a I was at 200a phase which is 1.66 ratio. Didn't want to go higher due to star torque wanting to flip me. There is a very noticeable difference in the way my eb318 controller and the eb236 controller ride. The eb318 seems to be smoother but touchier on the throttle input and the eb236 feels like it has a more powerful midrange pull but I feel the transitions in the waveform switching as I near top speed, almost a grumbling feeling before going smooth.

I just sold my custom tricked out 4115 eb236 so now i have to build another one to play with. I was hoping to push the eb236 really hard and see what it could do but have been too busy and broke. I think it can do well over 200a in bursts but ill never know unless I finish this one which is the original board from the other on. I'm in the process of desoldering the old crap and have it cut down to fit a Hammond case and had some Custom heat sink bars made. Not sure if ill build with 4115s or 4110s yet. I'm just about ready to sell a lot of my ebike stuff so i can get back to being debt free. I keep going back and forth on it though. Kinda torn since I'm in so deep and its fun, but unless this new job comes through and I'm able to park my bike some place safe there it seems pointless to keep all this stuff especially all my batteries most of which only have shallow cycles at low c rates because I run large packs. Its all in my fridge right now. 10 almost new nanotech 6s 6ah packs I wasted 800 on along with 20+ other 6s 5ah packs. I'm even thinking of selling both the bikes I built since they are gathering dust.

[jamo96]

If so is that hacked programming software I sent you helping out? I've been considering posting it on here for others.

I'd be interested in a tweaked version of the programming software. I have a 24 FET controlling my go kart - viewtopic.php?f=34&t=40631

... I wouldn't mind having a little more control of the controller parameters...