rear battery boxcharginginstrument panelmy co-workerdrivetraininteriorfront battery boxfront battery box
OwnerDave Hale
LocationSunland, California US map
Email email image
Vehicle1972 Porsche 914
Purchased running from craigslist for $2000 (factoring in the $500 I got for the engine), with the intention of converting to electric.
MotorAzure Dynamics/Solectria AC24LS 3-Phase AC
Drivetrain5 speed manual transmission (upgraded to side-shifter) coupled through stock clutch & lightened flywheel to electric motor.
ControllerAzure Dynamics/Solectria DMOC 455 II
Batteries324 LG Chem, 4.15 Volt, Lithium-Ion
Cells are lithium manganese oxide (LiMn2O4) manufactured by LG Chem for the GM Chevy Volt. They were salvaged from a crashed 2013 Volt.

Pack consists of two "batteries" in parallel. Each battery consists of 3p54s cells, so I have 108 individual cells to monitor. Each cell is actually 3 Li-Ion pouch cells in parallel, spot-welded at the tabs.

Each pouch cell is 15Ah/4.15v nominal. 3p makes 45Ah. 54 cells in series at 4.15v makes 224v. Two of these in parallel makes 224v/90Ah, nearly 20 kWh. I chose to not charge them fully, so I operate them at about 19kWh.

Batteries managed by Elithion Pro BMS
System Voltage216 Volts
ChargerElcon PFC2500
Programmed with Alg520v and set to 226v. Operates on 110 or 220vac.
DC/DC ConverterIota 501-DLS-110-55-K
DC-DC Converter, 636W, 53A, 120-370vdc Input, 10.5V-14.5VDC Output

EVSource Item# 500-DCDC-636
WebPage
Instrumentation* 6-16V Aux Battery Volts
* +/- 200A AMPS
* New electronic speedometer from NH Speedo
* Refurb orig tach
* Elithion State of Charge gauge
Top Speed75 MPH (120 KPH)
have not attempted faster
Accelerationunmeasured, but about like the original 914. Good enough, but not winning any races.
Range70 Miles (112 Kilometers)
60-80, depends on driving conditions

theoretical max is almost 100 mi (19.4kWh/200Wh/mi)
Watt Hours/Mile200 Wh/Mile
EV Miles
Current:13,499 Miles (21,719 Kilometers)
Seating Capacity2 adults
Curb Weight2,260 Pounds (1,027 Kilograms)
TiresMichelin Energy Saver A/S, Low Rolling Reistance 195/60R15 87T SL Green X
WebPage /> 40 psi
Conversion Timeoriginal conversion took 3 mo of evenings (maybe 200-300 hours??) Removed engine on 2/1/09; started driving it on 4/30/09.

Upgrade from lead-acid to Lithium took longer.
Conversion Costabout $20k including donor vehicle, conversion kit, and batteries (not including some extra, optional work)
Additional Features* Regenerative braking
* New dash instrument cluster
* Modified (light weight) flywheel
drove 12,669 miles on lead-acid batteries, from 2009-2011. Vehicle sat idle from 2011-2016 until Li-Ion added, back online 1/29/2016 at 12669 mi under Li-Ion power.

Other, non-EV-specific work I did to the car:

* Added beefier torsion bars, KYB front shocks, and KYB rear suspension
* Porsche 911 turbo tie rods
* New ball joints, CV joints
* POR-15 for cargo and engine compartments
* Elephant Racing PolyBronze suspension bearings (front control arms)
* Newly rebuilt later-model side-shifter transaxle
* Modified (lightened) flywheel



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