rear battery boxcharginginstrument panelmy co-workerdrivetraininteriorfront battery boxfront battery box
OwnerDave Hale
LocationSunland, California United States 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
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

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

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 HK-J-H440-20
HK-J series 6.6KW IP67 sealed CAN bus
charger. The J1772 standard dictates the
charge current and controls the charger via
CAN bus (using my own design EVSE
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

Instrumentation* 6-16V Aux Battery Volts
* +/- 200A AMPS
* New electronic speedometer from NH Speedo
* Refurb orig tach
* State of Charge gauge
Top Speed80 MPH (128 KPH)
have not attempted faster
Accelerationunmeasured, but about like the original 914.
Good enough, but not winning any races.
Range50 Miles (80 Kilometers)
60-80 possible depending on driving

Theoretical max is almost 100 mi
(19.4kWh/200Wh/mi) but I currently have the
BMS programmed to give me about 50 miles
Watt Hours/Mile200 Wh/Mile
EV Miles
Current:50,021 Miles (80,483 Kilometers)
Seating Capacity2 adults
Curb Weight2,260 Pounds (1,027 Kilograms)
TiresMichelin Energy Saver A/S, Low Rolling
195/60R15 87T SL Green X
WebPage /> tire/green

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
Conversion Costyou can't put a price on love
Additional Features* Regenerative braking
* New dash instrument cluster
* Console-mounted computer displays telemetry, acts as radio,
MP3 player, GPS, etc.
* J1772 inlet finally added 11/11/18 (previously charged from a
standard 110 outlet)
* Smart J1772 EVSE interface (of my own design and
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
* Porsche 911 turbo tie rods
* New ball joints, CV joints
* POR-15 for cargo and engine compartments
* Elephant Racing PolyBronze suspension bearings (front control
* Newly rebuilt later-model side-shifter transaxle
* Modified (lightened) flywheel

code by jerry