The MotorThe TrunkMotor Bay
OwnerTim Catellier
LocationChandler, Arizona US map
Web/EmailWebPage email image
Vehicle2000 BMW Z3
MotorNetgain WarP 11 Series Wound DC
Drivetrain5 Speed Manual
ControllerCafe Electric Z1K-HV
Zilla with Hall Effect Pedal Option
Batteries48 Skyenergy 120AH, 3.30 Volt, Lithium Iron Phosphate
System Voltage160 Volts
ChargerManzanita Micro PFC-20 w/ Buck enhancement
Wish I'd added the meter option. Great charger though.
Heater1500 Watt Ceramic Heater
DC/DC ConverterIota DLS-55
Two wired in parallel along with a SLI backup battery. The power steering pump can draw up to 85 amps on a hard turn, so one Iota wouldn't cut it.
InstrumentationTBS Link-Pro
Top Speed80 MPH (128 KPH)
There was still plenty of throttle left, and the car was pulling nicely. I need somewhere I can really test it (legally).
Acceleration0-40 mph is much faster than stock, but then acceleration tapers off. 0-60 is just under 10 seconds. Stock was 7.5.
Range62 Miles (99 Kilometers)
In the interest of maximizing the life of the batteries, I'll be limiting my trips to 50 miles or less.
Watt Hours/Mile320 Wh/Mile
This is in average stop and go traffic. I have seen results as good as 280 Watt/hours per mile.
EV Miles
Start:134,214 Miles (215,950 Kilometers)
Current:140,914 Miles (226,730 Kilometers)
Total:6,700 Miles (10,780 Kilometers)
 
    As of 11/15/2011
Seating Capacity2 adults
Curb Weight3,285 Pounds (1,493 Kilograms)
Stock was 2900 Lbs.
Tires225/50 R16 Bridgestones that came on the car. Will look into LRR tires when time comes to replace these.
Conversion TimeFrom engine pull to out of the garage was 1 year and 3 weeks. There were about 5 months spent idle waiting on various parts. All in all I'd estimate between 550 and 600 hours of work.
Conversion CostCar - $7,600
Conversion - $23,500
Additional FeaturesI'm using a Toyota MR2 power steering pump wired to a proximity switch. The pump stays off in straight line driving, but comes on with a slight turn and stays on until the wheels are pointed straight for 10 seconds.

I recently added a MasterFlux A/C system which cools the cabin nicely with a 50° split between outside temp and output at the vent.

code by jerry