Restoring the machine 
Monday, October 23, 2006, 11:15 AM

I got the bike on sunday! It's pretty complete, but in dire need of restoration. The brakes haven't been used in a looooong time. It has front and rear discs, so I get to deal with two hydraulic systems.

The motor has good compression, so I'm going to restore the rest of the bike and get it running before starting the conversion. My time is pretty limited for a while, so it's a good compromise. It's also far, far easier to get it licensed and inspected with the original hardware.

For now I'll post updates as they come along.
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Friday, October 20, 2006, 05:30 PM
I almost picked up a 6.7" Advanced DC motor off ebay. I didn't bid too aggressively because I wasn't sure I really wanted it.

I think there are two choices for motor.
The briggs and stratton Etek motor - chinese made, usually about $500.

I'm leaning towards a Perm 132. It's the same technology as the Etek, but german made and bigger and better. It costs a bit more, but it's the heart of the machine.

Perm 132:
at 48v: 15.1 peak hp, 86% efficency.
at 72v: 34.2 peak HP, 88.6% efficiency.

That's enough to temp me into a higher voltage system...

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nice battery comparison page 
Friday, October 20, 2006, 12:17 PM
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Spiral Cell batteries 
Friday, October 20, 2006, 12:13 PM
Exide Orbital XCD
12v 50AH, 41 lbs, 10.17 x 7.00 x 8.12H, 2.5 milliohms, Peukerts <1.05
600Kw each

Optima Yellow Top:
model D34/78, 12v 55AH, 43 lbs, 10 x 6.8 x 7.8H.

Optima 31 12v 75 AH, 60 lbs, 12-13/16 x 6-1/2 x 9-3/8H. Both are 2.5 milliohms, Peukerts 1.05,

4 x Exide Orbitals:
124lbs, 2.4kwH (48v x 50Ah)
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Prius battery details 
Friday, October 20, 2006, 11:52 AM
The prius pack I'm looking at is made up of 38 modules, each consisting of 6 1.2v cells. Right.
Here's the skinny. Each module weighs 1.04Kg.
38 modules x 1.04Kg = 39.52Kg.
39.52Kg = 87.13lbs

So, 88lbs, flexible configuration, 273.6 volts, 6.5Ah.
That's 1.788Kwh

The downside: They get hot during charging and require BMS.
The upside: I'm building a motorcycle. Plenty of airflow avaliable.
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