Engine CompartmentRear TrunkInteriorFront Trunk
OwnerBen Apollonio
LocationShirley, Massachusetts United States map
Web/EmailWebPage email image
Vehicle1974 Porsche 914
MotorAdvanced DC FB-4001A Series Wound DC
Bought used
DrivetrainStock 5-speed 901 transmission with
ElectroAuto adapter & hub. CenterForce
ControllerCafe Electric Zilla Z1K
So much nicer than my old T-Rex in so many
ways. You really have to feel it to fully
appreciate it.
Batteries54 Thunder Sky LFP-100AHA 100Ah, 3.20 Volt, Lithium Iron Phosphate
System Voltage173 Volts
ChargerElcon 1500W PFC
Voltage limit set to approx. 3.45V/cell
Heater1500W Ceramic
Single core (this isn't a winter car)
DC/DC ConverterElcon 30A, 132-168Vin
Regulation seems slightly unstable. Makes noise under heavy
acceleration and sometimes triggers windshield wiper circuit.
Was a DCP 300W until it blew up Nov 2012.
1000A ammeter for motor current
Custom BMS
Top Speed>90 MPH
70-75 is plenty fast enough for me. It's
the acceleration that counts.
Acceleration0-40 in 2.8 seconds (2nd gear)
40-60 in 3.2 seconds (3rd gear)
Smokes tires
Range60 Miles (96 Kilometers)
1.2-1.5Ah/mile depending on driving conditions and speed.
Typically keep it at 60-65 on the highway. Never discharged
below 20% SoC.
Watt Hours/Mile280 Wh/Mile
From the AC grid, measured using a
kill-a-watt. Average over
3000 miles of mixed country,
interstate, and stop-and-go driving.
EV Miles
Start:92,771 Miles (149,268 Kilometers)
Current:99,144 Miles (159,522 Kilometers)
Total:6,373 Miles (10,254 Kilometers)
Seating Capacity2
Curb Weight2,400 Pounds (1,090 Kilograms)
Stock weight was 2100lbs
GVWR is 2690lb
TiresContinental ProContact with "EcoPlus" low
rolling resistance.
Conversion Time9 years
Conversion Cost$13K for conversion
$3.5K for Zilla upgrade
$23.5K total
Additional Features- Custom BMS for safety, monitoring, & balancing
- Netgain WDT-CP hall effect cable pull throttle
- Conversion leaves front and rear trunk space untouched
- Aftermarket audio amp with aux input cable for iPod and
subwoofer from 914rubber.com
- Zilla cooling: Salvaged dual-fan radiator and Laing DDC-1
Roadworthy since March 2012
Heater added May 2012
Upgraded from T-Rex to Zilla November 2012
Installed new DC/DC January 2013
New charger September 2013
New suspension October 2013
Broke 2nd gear June 2014; repairs completed October 2015

Controller was originally a used T-Rex 1000 (internally de-
tuned to 800A) for the first 1670 EV miles...until it blew
up 10/5/12 (despite an overhaul by Peter Senkowsky in June

Original Custom Charger (1st 5000 miles):
Microcontroller servos a motorized variac and uses BJTs as linear post-regulators for
constant-current output and AC ripple cancellation. 5A max output. Approx. 87%
efficiency and 77% power factor, measured using Kill-A-Watt and LinkPro meters.

code by jerry