i'd supercharge it
i'd supercharge it
97 tahoe 8" lift w/ 37" tires
07 toyota fj
02 avalanche 2500
97 xj
from what i understand, wont this go from 0-full power immediatley? which should result in some mega wheelies...
omg how cool would it be to see a vid of a guy on a electric pedal bike smoking tire... hint hint
No, thats what the Pulse Width Modulation ciruit is for it will limit the time the motor has full voltage to a millisecond or so at a each pulse allowing me to control the speed. More pulses the longer the motor is on, I just need to make a spring loaded varible resistor to use as a throttle.
So I guess that the president of RIT built an electric bike. He rode it to baja's sponsor day and rumor has it he did a front wheel burnout.
Just some inspiration.
Wait, that guy that rides around the free lot on that electric 1970s bike with the front hub motor did a burn out?
wow......
-Olive Drab '92 YJ 2.5L 4 cyl. 5" of Lift on 31s
-Red 95' Ford Mustang 3.8L V6
[URL]http://www.facebook.com/s.php?init=q&q=Josh%20Smith&ref=ts&sid=08224d5b5a2d538d53383c6dc50e92aa&n=-1&o=4&hash=386f3c35d984fbab966f16b2e50c02a4&sf=p&s=40#/profile.php?id=1715834776&ref=profile[/URL]
PM from [B]Gibson[/B]:
" **** off you donkey fistting pedofile "
so what batteries are you going to use for this? and what kind of life are you predicting?
taking unsafe rigs to a whole other level
I was planning on using two 20ah AGM lead acids, should give me a couple hundred charge cycles.
I made another controller circit, and gave it to dr.arif to give a once over. When I got home I made another mount for the motor since the last one broke
Their only like 15-20 pound each,
Well I got the whole thing together! and flipped it for a motor test, and it spins that tire like there is no tomorrow!
So then I took it for a road test with some bigger batteries(a 15 and 20ah SLA in series for 24v) and they just cant give me the amps I need for full torque and hp.(140amps)
So I tested it with two group 30 deep cycles I put on a backpack frame it got me zipping round at 32mph at the max but I had 180lbs of batteries on my back and even with the cooling fan I installed on the motor, it was burning hot!! (gave me a nice blister when I touched it) I've given up on the winch motor, it just needs to many amps, I might rewind it to use for another project.
Here is the stationary test
http://www.youtube.com/watch?v=hlt7ZYcspSg
The road test with the winch motor
http://www.youtube.com/watch?v=m_DX0kPPsgk
So I've bought a Scott 1hp motor its huge compared to my winch motor, best part is it draws only 41amps instead of 140! I think I'll overvolt it with 36volts using some dewalt LiFeP04 36v batteries(I saw a good deal locally on craigslist for a tool kit from a business that went under and I could use a new drill)
I made a new controller diagram using a 556 one half controlls the frequency the other controls the pulse width, I think I have some 3k nested pots in my junk box, as I turn it up the frequency and pulse time with increase maybe it will help with motor noise.
You ran a stop sign
Acer Offroad A♦A♣A♠A♥
I was just waiting for the chain to break and cut your toes off!
awesome...
1980 CJ-7 304 TH400 BW1339
1999 TJ Sport 4.0 32RH NP231
2001 XJ Sport 4.0 AW4 NP231
The new motor, compared to a 4 gauge and a 12gauge shell
old motor vs new motor
Last edited by DeathBlade556; 10-17-2008 at 10:40 PM.
taking unsafe rigs to a whole other level
Well I've started working on it again I've decided to upgrade the battery to 4 half U1 12v 18ah AGMs for a 48v 18ah pack it will weigh 47 pounds (this is going to be a heavy mountain bike) And since I'm doubling the voltage I'll double the motor RPM from 3000rpm to 6000rpm I've added another 9t sporket and a 20t freewheel for 2.222 plus the original 6.22 for a 13.82 ratio which will give me a max speed of 32mph. I've bought a YK42 controller and thumb throttle so just need to wait for the batteries to come in. Then I can start looking for a rolling frame for my e-dirtbike build. (anybody got a rolling chasis they dont need?)
And my next next idea an electric pedal ATV
Last edited by DeathBlade556; 12-05-2008 at 10:34 AM.
Was at the machine shop at RMU today and had some free time so I make this 100 Amp / 200 Volt gauge for the bike, the green display is volts (200VDC) and the red is amps (100A)
Update?
WTF? I'm on the edge of my seat over here........
I need to upgrade to a better bike, on the current one its too hard to ride fast over bumps without suspension.
The drive train of the motor I'm upgrading with a sturmey archer 3speed AW hub to give me 1.33, 1, then 0.75 gears. I'm calculating my stop speed in high gear being 37mph and low gear as being 17mph.
I got in 4 new gruber 1/2 U1 batteries 12volts @ 18amphours I'll use three for a 36volt back.
Considering the weight of the batteries I assume your not considering a full suspension?
I have a set of front Rock shoxs I would be more than happy to donate, well as long as I can to take it for a spin!
My current bike has a 1" threaded tube, its just too old. Shifters are shot, freewheel cassette is worn out, brakes are going. Just need a new bike, looking at a 07 diamond back responce he wants 250 I'll see if I can talk it down to 200.
I bet if you tell him what you're doing with it and show him this thread, he'd be more than willing to knock it down to $200. At least if he's a cool guy he will.
It's about to get all kinds of stupid up in here!
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