amberwolf said:
c70r said:
Frankly I decided to withdraw my post when I realised the people in this thread have little idea what they're doing.
Well, removing the info that is actually useful is a great way to prevent anyone from learning.
The whole point of this place is to share information so that people who don't know what they're doing can learn and become people that *do* know what they're doing. Not everyone is going to learn from what's posted, but some will, and that's better than no one being able to.
If everyone did what you chose to do, this would be a very empty place, with nothing to share and nothing to learn from.
thoroughbred said:
c70r said:
What happened to a few of the good posts here? Lots of information lost. Even one of the original poster's replies is gone?
By popular demand my original post is back I guess. It was as follows:
The hard part is finding the correct motor, controller and battery. The making of mounts wasn't personally a big deal for me, just printed them out on paper, cut cardboard, check they were right then sent them to be laser cut.
Motors:
- Zero 75-5, the ideal choice. Fairly compact and light motor capable of 35kW.
- Zero 75-7, the bigger brother. A little larger and heavier capable of 50kW. Though it's rated at 50kW peak, if your intention is race motocross (wide open throttle) then I would suggest this motor but running it at peaks of 35-40kW so you don't reach thermal throttling.
- ME1302, a water cooled motor, has been dyno'd at 40kW using a 30s system. Motenergy motors in general are poor, especially at lower voltages hence why I haven't recommended any other models. I only recommend the 1302 because of the watercooling and 40kW capability.
Controllers:
- Sevcon Gen 4
- Size 4 (around 40kW peak @28s)
- Size 6 (around 60kW peak @28s)
A great controller. Their single fault is their programming, they require an expensive proprietary cable and software license.
- Mobipus
- 72600 (50 kW peak @ 22s) - A single distributor, ballaratebikes.
- 96400 (54 kW peak @ 28s) - No longer available new, extremely rare.
Both are very good controllers which come in water cooled variants. Lack of OEM support, mostly configurable but a few things are locked away and require a time pass which is hard to get from a distributor. There are reports that buyers have had trouble getting real support from the distributor.
- ASI
- BAC8000 (32kW peak) - Two issues with this controller. One is the distribution; alot of people have issues with ERT (distributor) such as undeclared delays and lack of communication. Secondly, it is claimed and sometimes even advertised that this controller is capable of more than 32kW but is currently software capped. It has been claimed this software cap would be removed multiple times but nothing has happened yet. Anybody who has the intention of wanting more than 32kW should wait until this cap is officially removed.
I'm not going to talk about batteries right now. That's a whole chapter you shouldn't even remotely start to think about till you think you know which motor and controller you intend to run. There are plenty of solutions that can fit into a frame that size, from various builds I've seen 4-6kWh being able to fit with a 10c capability usually (essentially 40-60kW capable battery setups).
Disclaimer: The above info is correct to the best of my knowledge, some may dispute the info I've claimed but believe me, I've spent a lot of my time and in some occasions my money learning the hard way.
And finally some general advice, a lot choose to ignore this. Just because you can dump x amount of power into a motor, it doesn't mean it will output anywhere near as much. Prime example is the ME1507, a highly used motor for conversions but unfortunately alot of the specs distributors use are false, it is a lower quality replica of the 75-7, can supposedly handle 50kW thermally but I don't believe anyone has managed to output more than 40kW due to poor design and efficiency.
Sorry for the long post, as mentioned before I had to learn the hard way due to the amount of false information from distributors and users who seem to not fully understand what they are selling/using.
