Motor to Flywheel CouplerUnderside of CarFuel Tank
OwnerMicah Abel
LocationGilbert, Arizona United States map
Web/EmailWebPage email image
Vehicle1977 Porsche 924
MotorNetgain WarP 9 Series Wound DC
Externally cooled with an Aux fan.
DrivetrainStock 4 speed manual with clutch
ControllerOpen ReVolt Gamera 800
Homemade HV 833 Amp based upon the open
source ReVolt controller using IGBT power
stage. Liquid cooling.
Batteries70 CALB/Skyenergy 60 Ah grey cells, 3.30 Volt, Lithium Iron Phosphate
System Voltage231 Volts
DC/DC ConverterMeanwell HRP600
53 amp output capability with adjustable
voltage output.
InstrumentationCycle Analyst plus custom BMS display
Top Speed79 MPH (127 KPH)
Reached 79 mph max to date with room to go.
AccelerationI have the controller derated to 600 amps
currently. I now start in 2nd gear since
1st gear doesn't last long. Could drive
it in 3rd gear only.
0-35 in 5.1 sec (actual with 600 amps)
Est 0-60 in under 10 sec when controller
is set to 833 Amps.
Range50 Miles (80 Kilometers)
Max actual distance on one charge to date is
47 miles.
Watt Hours/Mile250 Wh/Mile
Average of in town driving in a 45 mph zone.
Similar results on freeway at 70 mph.
EV Miles
Start:50,000 Miles (80,450 Kilometers)
Current:53,207 Miles (85,610 Kilometers)
Total:3,207 Miles (5,160 Kilometers)
Seating Capacity2+2
Curb Weight2,450 Pounds (1,113 Kilograms)
Current estimate of final weight is within
10 lb of stock weight with a full gas
TiresAspen Touring 185-70-R14
Conversion TimeBought vehicle Nov 29, 2011
Registered June 1, 2013
"Complete" Jan 2014
(Complete means all critical components are
installed and functioning)
Conversion Cost$13,179.50 +/- a few hundred
Additional FeaturesStock AC driven by the traction motor.
Air conditioning is working now. 3200+ miles and my daily
driver for the last 4 months.

Check out my progress on my blog at

code by jerry