Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

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FRUNKenstein
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Re: Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

Post by FRUNKenstein » Wed Nov 07, 2018 11:12 am

Schnell's next project:
awesome-walking-scooter-feet-bike-13590397930.gif
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Current:
2002 996TT X50, Guards Red
1987 928S4 Guards Red
1987 951 Guards Red

2006 955S Arctic Silver
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FRUNKenstein
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Re: Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

Post by FRUNKenstein » Wed Nov 07, 2018 11:13 am

This is funny because fat kid and bike.
gf-fb-bike-fail-in-water.gif
www.kansascityautomuseum.com
Current:
2002 996TT X50, Guards Red
1987 928S4 Guards Red
1987 951 Guards Red

2006 955S Arctic Silver
2006 955S Lapis Blue
Gone but not forgotten: 1999 996 C4 Aerokit Black; 1990 964 C2 Guards Red

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FRUNKenstein
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Re: Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

Post by FRUNKenstein » Wed Nov 07, 2018 11:17 am

This might be worth a shot for a little more umph up those San Diego hills (we called this JATO in the Navy):
giphy.gif
www.kansascityautomuseum.com
Current:
2002 996TT X50, Guards Red
1987 928S4 Guards Red
1987 951 Guards Red

2006 955S Arctic Silver
2006 955S Lapis Blue
Gone but not forgotten: 1999 996 C4 Aerokit Black; 1990 964 C2 Guards Red

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32wildbilly
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Re: Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

Post by 32wildbilly » Wed Nov 07, 2018 11:22 am

5chn3ll wrote:
Wed Nov 07, 2018 9:49 am
Aiight, the finished goods. I'm still shopping for a low-profile front caliper, but everything else is dialed in. Full charge range test will come as soon as the front brakes are sorted out...

The bar ends allow me to flip the bike upside down and work on it without tearing up the brakes, shifter, throttle, etc. - and will hopefully absorb any whacks the handlebars take in the event of careless cycling...

This shot shows the SLA battery pack (20 pounds, give or take) hanging from the top tube. The chunky red and black wires were the original connectors for the rack-mount UPS module that "donated" the batteries; better quick-connectors are coming eventually to make battery charging and swapping easier.
1.jpg

With the torque arm installed, no more shenanigans with the lowers. Even so, I really like to take it easy on the throttle. I may replace the thumb throttle with something a little more precise...while it's fun to blast down the street wide-open, pedal assist at low speed is a little touchy.
2.jpg

Charge-o-meter, throttle, and comically large brake levers with integrated kill switches...
3.jpg
I hope your batteries never have a catastrophic failure cause you will end up singing castrato soprano in Italian operas. Ouch! Actually it looks pretty cool despite the unfortunate placement of the batteries(at least the batteries are not Li-ion or you would be doomed!)

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Re: Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

Post by 32wildbilly » Wed Nov 07, 2018 11:23 am

FRUNKenstein wrote:
Wed Nov 07, 2018 11:17 am
This might be worth a shot for a little more umph up those San Diego hills (we called this JATO in the Navy):

giphy.gif
Damn FRUNK don't give him any ideas!

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32wildbilly
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Re: Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

Post by 32wildbilly » Wed Nov 07, 2018 11:24 am

FRUNKenstein wrote:
Wed Nov 07, 2018 11:13 am
This is funny because fat kid and bike.

gf-fb-bike-fail-in-water.gif
All that and the hole he falls in is probably a sanitary sewer drain!

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Kalashnikov
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Re: Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

Post by Kalashnikov » Wed Nov 07, 2018 11:31 am

Make a test drive video, and do some burnouts!

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5chn3ll
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Re: Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

Post by 5chn3ll » Wed Nov 07, 2018 12:01 pm

Heh - of all the things Mrs. Schnell might be concerned about - broken legs, arms, skull - the placement of the batteries is the only one she's mentioned aloud.

-----
32wildbilly wrote:
Wed Nov 07, 2018 11:22 am
I hope your batteries never have a catastrophic failure cause you will end up singing castrato soprano in Italian operas. Ouch! Actually it looks pretty cool despite the unfortunate placement of the batteries(at least the batteries are not Li-ion or you would be doomed!)

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5chn3ll
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Re: Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

Post by 5chn3ll » Wed Nov 07, 2018 12:01 pm



Image
FRUNKenstein wrote:
Wed Nov 07, 2018 11:13 am
This is funny because fat kid and bike.

gf-fb-bike-fail-in-water.gif
No, not you...

Image

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5chn3ll
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Re: Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

Post by 5chn3ll » Wed Nov 07, 2018 1:53 pm

Update: Rode the bike back to work from home @ noon. The route I went is 12 miles of mostly flat grade, a few long (quarter-mile or so) uphill segments of at least 5 degrees.

I also wasted ridiculous amounts of power just having fun, seldom bothering to pedal, not bothering to conserve any kind of momentum (hills, traffic signals, etc.), and it still had power to spare when I got here.

I haven't retorqued everything yet, but I'm stoked at how well it performed. No rattles, no surprise, not a single sketchy moment.

For the record, my crappy e-bike will walk a Prius from a dig.

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