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
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.
Range50 Miles (80 Kilometers)
60-80 possible depending on driving conditions.

Theoretical max is almost 100 mi (19.4kWh/200Wh/mi)
but I currently have the BMS programmed to give me
about 50 miles range.
Watt Hours/Mile200 Wh/Mile
EV Miles
Current:20,000 Miles (32,180 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 /> 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 longer.
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.
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

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

code by jerry