Search found 415 matches

by Grantmac
Aug 19 2019 10:18pm
Forum: E-Vehicles General Discussion
Topic: How Will Electric Vehicles Be Modified in the Future?
Replies: 123
Views: 1432

Re: How Will Electric Vehicles Be Modified in the Future?

Minivans ARE faster than Miatas, which are still the best selling convertible of all time.

There is such a thing as the joy of driving a slow car fast but it seems to be lost on most Americans.
by Grantmac
Aug 19 2019 1:37pm
Forum: E-Vehicles General Discussion
Topic: How Will Electric Vehicles Be Modified in the Future?
Replies: 123
Views: 1432

Re: How Will Electric Vehicles Be Modified in the Future?

A sportscar is about so much more than 0-60.
by Grantmac
Aug 18 2019 1:13pm
Forum: E-Bike General Discussion
Topic: FIM E-XBike World Cup
Replies: 8
Views: 184

Re: FIM E-XBike World Cup

An enduro-x track would have made way more sense then rolling the jumps on a moto-x track.
by Grantmac
Aug 17 2019 12:18pm
Forum: E-Bike General Discussion
Topic: Hub motor industry dying?
Replies: 201
Views: 4445

Re: Hub motor industry dying?

Adding even more weight to the rear wheel in the form of liquid cooling would have very limited application as opposed to simply building a better architecture where the motor in in the middle of the vehicle.
by Grantmac
Aug 16 2019 12:35pm
Forum: E-Vehicles General Discussion
Topic: How Will Electric Vehicles Be Modified in the Future?
Replies: 123
Views: 1432

Re: How Will Electric Vehicles Be Modified in the Future?

The first company to engineer a rear engined kit car that accepts a Leaf donor will be onto something. Like the Factory Five 818:
https://www.factoryfive.com/818/
Half the weight, none of the traction issues plus a tuned controller could make for a pile of fun.
by Grantmac
Aug 15 2019 1:02pm
Forum: E-Bike General Discussion
Topic: Help me develop the perfect throttle
Replies: 63
Views: 1236

Re: Help me develop the perfect throttle

Put me down for zero detent, low breakout forces but progressive force increase away from zero along with an exponential output if possible.
by Grantmac
Aug 15 2019 10:43am
Forum: Battery Technology
Topic: Building a LiPo pack with high discharge (burst 300A) and BMS
Replies: 19
Views: 267

Re: Building a LiPo pack with high discharge (burst 300A) and BMS

Look at large format EV cells and expect limited lifespan.
by Grantmac
Aug 14 2019 4:32pm
Forum: E-Vehicles General Discussion
Topic: How Will Electric Vehicles Be Modified in the Future?
Replies: 123
Views: 1432

Re: How Will Electric Vehicles Be Modified in the Future?

If you were willing to accept duty cycle limitations plus lifespan reduction I'm fairly sure most EVs could produce twice the power. At least the ones which aren't already sold as performance cars. Most EV cells are only charging to 4.05v and limiting discharge in order to hit longevity goals. That ...
by Grantmac
Aug 14 2019 9:57am
Forum: E-Bike General Discussion
Topic: Beginner E-bike DIY in Canada (Vancouver Island)
Replies: 10
Views: 268

Re: Beginner E-bike DIY in Canada (Vancouver Island)

What part of VI are you on? I commute 4-5 days a week in Victoria on a DIY ebike.
by Grantmac
Aug 13 2019 9:44pm
Forum: Motor Technology
Topic: Legit electric motor technology breakthrough?
Replies: 19
Views: 948

Re: Legit electric motor technology breakthrough?

This may only be a percent or two more efficient comparing peak to peak with current technology, but the potential for it to extended the efficiency plateau significantly in both directions is something that will need to be considered. Flux weakening increases RPM but with a fairly significant torqu...
by Grantmac
Aug 13 2019 11:11am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3960
Views: 299576

Re: Sur-Ron - New Mid drive Bike

20kw puts it in the 125 class if they can keep the weight down.
by Grantmac
Aug 13 2019 11:04am
Forum: E-Bike Technical
Topic: A low-cost e-MTB Production log
Replies: 41
Views: 842

Re: A low-cost e-MTB Production log

I'll be watching your progress on the faster models. I think there is a lot of room in the market for lightweight electric motorcycles which don't cost a huge amount.
by Grantmac
Aug 13 2019 10:55am
Forum: E-Vehicles General Discussion
Topic: Electric Dirtbike
Replies: 7
Views: 218

Re: Electric Dirtbike

The only thing I'd point out is that there are a few 150mm hubs which have a 6 bolt brake mount on both sides. Oh thats good to know! I saw a few out there but I couldn't seem to find one that was readily available. The wheels are already built but if things need to change that's good information. ...
by Grantmac
Aug 12 2019 10:03pm
Forum: E-Vehicles General Discussion
Topic: Electric Dirtbike
Replies: 7
Views: 218

Re: Electric Dirtbike

The only thing I'd point out is that there are a few 150mm hubs which have a 6 bolt brake mount on both sides.
by Grantmac
Aug 11 2019 6:30pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: 250cc Dirt bike QS3000 build
Replies: 6
Views: 343

Re: 250cc Dirt bike QS3000 build

It's steel? Yeah that'll add up for sure.

Thinking under 250lbs?
by Grantmac
Aug 10 2019 2:44pm
Forum: E-Vehicles General Discussion
Topic: How Will Electric Vehicles Be Modified in the Future?
Replies: 123
Views: 1432

Re: How Will Electric Vehicles Be Modified in the Future?

I'm thinking less about EV conversions into ICE vehicles which will also likely involve taking the best/cheapest components regardless of original manufacturer and combining them. What I'm thinking is reflashing to allow higher power than can be sustained for use in limited duration motorsport such ...
by Grantmac
Aug 10 2019 1:15pm
Forum: E-Bike Non-hub Motor Drives
Topic: Dengfu M09 Endruo/Freeride build log
Replies: 20
Views: 666

Re: Dengfu M09 Endruo/Freeride build log

Any worries about getting the motor to work without the CANBUSS BMS?
by Grantmac
Aug 10 2019 1:06pm
Forum: E-Bike Technical
Topic: A low-cost e-MTB Production log
Replies: 41
Views: 842

Re: A low-cost e-MTB Production log

46kg is quite good. What battery size would that include? 18650 48v57.6ah 156*3200 5C-10C My priority is low power. The high-power ones are simply tested. The battery box is too large. I have to make him beautiful. :lol: 48v seems very low to allow good speed using just one gear. Have you thought a...
by Grantmac
Aug 09 2019 11:25pm
Forum: E-Bike Technical
Topic: A low-cost e-MTB Production log
Replies: 41
Views: 842

Re: A low-cost e-MTB Production log

46kg is quite good. What battery size would that include?
by Grantmac
Aug 09 2019 11:00pm
Forum: E-Vehicles General Discussion
Topic: How Will Electric Vehicles Be Modified in the Future?
Replies: 123
Views: 1432

Re: How Will Electric Vehicles Be Modified in the Future?

It'll be reflashes, body modification and suspension tuning.

I highly doubt that motor or controller swaps will be very common. Possibly range boosting additional batteries.
by Grantmac
Aug 08 2019 4:03pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: 250cc Dirt bike QS3000 build
Replies: 6
Views: 343

Re: 250cc Dirt bike QS3000 build

How much peak power are you thinking? Estimated weight?

I was considering the same motor into a youth sized frame (KX100/105SX/CRF150RB).
by Grantmac
Aug 08 2019 3:19pm
Forum: E-Bike Technical
Topic: A low-cost e-MTB Production log
Replies: 41
Views: 842

Re: A low-cost e-MTB Production log

Estimated weight for a model that peaks at 10-15kw?

I personally don't like the battery crash structure. It adds too much visual clutter.

What is the rear shock length and suspension travel?
by Grantmac
Aug 08 2019 1:55pm
Forum: E-Bike General Discussion
Topic: Hub motor industry dying?
Replies: 201
Views: 4445

Re: Hub motor industry dying?

Mid drives are not outperforming big hubs, unless the trails are very slow and technical. When the trails are nice enough to speed, mid drives are left in the dust. Unless you are talking a 10kw hub vs a 5kw mid on a flat surface drag race then I couldn't disagree more. None of the performance moto...
by Grantmac
Aug 08 2019 1:47pm
Forum: E-Bike General Discussion
Topic: Help me develop the perfect throttle
Replies: 63
Views: 1236

Re: Help me develop the perfect throttle

cycborg wrote:
Aug 08 2019 9:13am
Bi-directional for regen
This, plus durable and stealthy.
by Grantmac
Aug 07 2019 8:00pm
Forum: E-Bike General Discussion
Topic: Hub motor industry dying?
Replies: 201
Views: 4445

Re: Hub motor industry dying?

Until a hub is light enough to not adversely impact handling and powerful enough to start on a 30 degree slope the there will be mid-drives outperforming them offroad.

A mid-direct setup with a reduction that could also shift to direct drive (easy with planetaries) would offer some huge advantages.