|Location||Sunland, California US map|
|Vehicle||1972 Porsche 914 |
Purchased running from craigslist for $2000 (factoring
in the $500 I got for the engine), with the intention of
converting to electric.
|Motor||Azure Dynamics/Solectria AC24LS 3-Phase AC|
|Drivetrain||5 speed manual transmission (upgraded to side-|
shifter) coupled through stock clutch & lightened
flywheel to electric motor.
|Controller||Azure Dynamics/Solectria DMOC 455 II|
|Batteries||324 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
Batteries managed by Elithion Pro BMS
|System Voltage||216 Volts|
Programmed with Alg520v and set to 226v. Operates
on 110 or 220vac.
|DC/DC Converter||Iota 501-DLS-110-55-K|
DC-DC Converter, 636W, 53A, 120-370vdc Input,
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 Speed||75 MPH (120 KPH)|
have not attempted faster
|Acceleration||unmeasured, but about like the original 914. Good |
enough, but not winning any races.
|Range||50 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/Mile||200 Wh/Mile |
|Seating Capacity||2 adults|
|Curb Weight||2,260 Pounds (1,027 Kilograms)|
|Tires||Michelin Energy Saver A/S, Low Rolling Reistance |
195/60R15 87T SL Green X
WebPage /> tire/green
|Conversion Time||original 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 Cost||you 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