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

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gnat
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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 gnat » Tue Mar 19, 2019 12:08 pm

32wildbilly wrote: Tue Mar 19, 2019 11:58 am
5chn3ll wrote: Tue Mar 19, 2019 10:39 am Nobody beats a Viggen.
You guys mean Vegan...right? :roll: :lol:
No. Saab Viggen. The car all 911 Turbos fear!

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DTMiller
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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 DTMiller » Tue Mar 19, 2019 12:17 pm

Fastest car in the world.
2002 Guards Red Targa, Fister exhaust, H&R Sport Springs, semisolid motor mounts
1997 MX-5 track car
Friday at the Track, Chin Trackdays, SCCA WDCR Novice Classroom Instructor, SCDA, Audi Club Potomac, TrackDaze HPDE Instructor
June 16, 2017 Funland GoKart Champion (6:13 p.m. main event)
Willing to risk life for track time

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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 » Tue Mar 19, 2019 12:31 pm

DTMiller wrote: Tue Mar 19, 2019 12:17 pm Fastest car in the world.
Yes. I remember that long ago dusty thread! I was only picking on the two resident geeks. :?
Never gonna make you cry...

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gnat
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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 gnat » Tue Mar 19, 2019 1:12 pm

32wildbilly wrote: Tue Mar 19, 2019 12:31 pm
DTMiller wrote: Tue Mar 19, 2019 12:17 pm Fastest car in the world.
Yes. I remember that long ago dusty thread! I was only picking on the two resident geeks. :?
Are you sure that screwing with the people that have total control over your account is the wisest move you've made today? :lol:

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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 » Tue Mar 19, 2019 1:32 pm

gnat wrote: Tue Mar 19, 2019 1:12 pm
32wildbilly wrote: Tue Mar 19, 2019 12:31 pm

Yes. I remember that long ago dusty thread! I was only picking on the two resident geeks. :?
Are you sure that screwing with the people that have total control over your account is the wisest move you've made today? :lol:
I've done worse!
Never gonna make you cry...

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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 » Tue Mar 26, 2019 2:38 pm

20190326_143547.jpg
20190326_143559.jpg
20190326_143011.jpg

Understeer: You will hit the wall with the front end.
Oversteer: You will hit the wall with the rear end.
Horsepower: How hard you will hit the wall.
Torque: How far you will move the wall.

Gone hunting with Alec Baldwin and Dick Cheney. Back soon.

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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 » Tue Mar 26, 2019 4:41 pm

5chn3ll wrote: Tue Mar 26, 2019 2:38 pm 20190326_143547.jpg


20190326_143559.jpg


20190326_143011.jpg
So are the pics at the office or does your wife really let you keep that contraption in the house?
Never gonna make you cry...

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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 Mar 27, 2019 12:53 pm

Those pics are at the office, but the Mrs. is very tolerant of my...gadget proclivity.

Understeer: You will hit the wall with the front end.
Oversteer: You will hit the wall with the rear end.
Horsepower: How hard you will hit the wall.
Torque: How far you will move the wall.

Gone hunting with Alec Baldwin and Dick Cheney. Back soon.

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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 Apr 24, 2019 2:24 pm

Update: The seatpost mount I used suffered catastrophic failure - looks like fatigue from the vibration - and the damn battery fell off.

The beam failed just past the weld - I was not anticipating this mode of failure.
58375657_10216898716032957_5362102811758690304_n.jpg
58375657_10216898716032957_5362102811758690304_n.jpg (42.14 KiB) Viewed 2527 times
This mount is much more damped; I think that, plus the much chunkier beam, should result in a longer life span. If I make any bikes for other folks, I'll use a 3-point rack that will tolerate loads much better - I just like the look of this seatpost mount.
Newmount.jpg
Newmount.jpg (62.06 KiB) Viewed 2527 times

Understeer: You will hit the wall with the front end.
Oversteer: You will hit the wall with the rear end.
Horsepower: How hard you will hit the wall.
Torque: How far you will move the wall.

Gone hunting with Alec Baldwin and Dick Cheney. Back soon.

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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 gnat » Wed Apr 24, 2019 2:38 pm

Always a good resume of a welder that the metal itself fails rather than the weld (bonus for the nice looking Tig weld) 8-)

Given the weight and that it's hung so far out, I'd add some braces down to the rear wheel frame. That should take the strain off that single joint.

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