Porsche 914 Electric Conversion FAQ

The 914 EV Conversion Guide was written to remove the guesswork that typically slows down first-time EV conversions. Here are some of the most common questions about converting a Porsche 914 to electric power using this guide. The system described here is currently powering two daily-driven electric Porsche 914s. If your question is not covered below, feel free to reach out through the contact page.

About the Conversion

Why convert a Porsche 914 to electric?

• Because there is nothing quite like cutting through canyon roads in an agile electric 914 — smooth, silent, and instantly responsive to your command.

What does a Porsche 914 electric conversion typically cost?

• The total cost depends on the condition of the vehicle and the specific components chosen, but most builders should expect EV component costs for this system to fall in the $20,000–$25,000 range, depending on battery pricing, component sourcing, and shipping costs.
• The largest costs are typically the battery modules, motor and controller, chargers, and battery management system. The 914EV Conversion Guide includes a complete parts list with links to suppliers so builders can see current pricing for every component.

Can I purchase all of the EV components as a kit?

• No. The components used in this conversion are sourced from several specialized EV suppliers, each of whom manufactures specific parts of the system.
• The 914EV Conversion Guide includes a complete parts list with direct links to each supplier, allowing builders to purchase the exact components used in the documented conversion.
• Sourcing the parts individually ensures that builders receive the most current versions of each component and allows pricing to remain transparent.

What is included in the 914 EV Conversion Guide?

The Guide includes:
• Step-by-step instructions for converting a Porsche 914 to electric power
• Extensive reference photos throughout the build process
• Main wiring harness and BMS diagrams
• Battery box and relay box layout diagrams
• Programming instructions for the HyPer9 HV motor controller and Dilithium MCU
• A Quick User Guide for operating the finished vehicle
• A complete parts list with a link to a live online version containing vendor links

Does the conversion change the weight balance of the car?

• The battery modules are distributed fairly evenly across the chassis. Removing the gasoline engine, fuel tank, and spare tire, and replacing them with the electric motor and battery modules results in a net curb weight increase of about 230 pounds, with roughly 100 pounds biased toward the rear axle.
• The additional mass over the front axle provides slightly more grip in corners, while the low center of gravity preserves the handling characteristics of the original mid-engine layout.
• The result is a driving experience that remains unmistakably Porsche 914.

How does the performance compare to the original engine?

• The HyPer9 HV motor provides 120hp, which is 42% greater than the stock 84hp 1.8L gas engine. It also offers 170 lb⋅ft of torque, which is 70% more than the original 102 lb⋅ft. Electric motors produce abundant torque instantly, which gives the car strong acceleration from a stop. Combined with the lightweight chassis of the 914, the result is a very responsive and engaging driving experience.

Can the car be returned to gasoline power later?

• Yes. The conversion does not require cutting or permanently modifying the chassis. Because the EV components mount using dedicated brackets, the car can be returned to a gasoline engine configuration if desired.

Converting the Car

Do I need advanced fabrication skills to complete the conversion?

• No. The conversion described in the Guide does not require custom fabrication.
• All EV components mount using the bolt-in bracket system designed specifically for the Porsche 914, available in the 914Electric store. These brackets position the motor, battery boxes, controller, chargers, and other EV components using existing mounting points in the chassis.
• Basic mechanical ability, careful wiring work, and standard shop tools are required, but no welding or chassis fabrication is necessary.

What special tools are required for this conversion?

• No specialized shop equipment is required, and the conversion can be completed in a typical residential garage. In addition to a normal set of automotive hand tools, the following items are recommended:

• Three pairs of jack stands and a hydraulic floor jack
• A clean workbench for electrical assembly and soldering work
• A handheld drill with metric drill taps and step drill bits
• Large cable cutters suitable for 2/0 battery cable
• A hydraulic crimping tool with interchangeable dies for high-current cable lugs
• A heat gun for heat-shrink insulation

• No additional specialized equipment is required beyond a standard automotive tool set.

How difficult is the electrical wiring?

• The electrical portion of the conversion is straightforward when approached methodically. The 914EV Conversion Guide includes detailed wiring diagrams, harness maps, and step-by-step instructions that show exactly how each component is connected.
• Most of the work involves routing wiring harnesses, terminating cables, and making secure electrical connections. Builders who are comfortable with basic electrical work such as soldering, crimping, and following wiring diagrams will find the process manageable.

How long does the conversion typically take?

• The time required depends on your experience level and how consistently you are able to work on the project. Builders working evenings and weekends typically complete the conversion over several months.
• Because the 914EV Conversion Guide provides detailed instructions, diagrams, and parts sourcing information, much of the trial-and-error normally associated with EV conversions has already been removed.

Can I reuse my existing flywheel, pressure plate, and clutch?

• It is not recommended. The stock flywheel includes starter ring gear teeth and is intentionally heavy to smooth the pulsing power of a gasoline engine.
• An electric motor produces smooth, continuous torque, so that extra flywheel mass is unnecessary and only reduces acceleration.
• For this conversion it is best to use the EV West lightweight aluminum flywheel and a 200mm solid-disc performance clutch.

Are the rear battery boxes mounted differently depending on the 914 year models?

• Yes. Due to the design of the shift linkage, the later model 914 with the side-shift transaxle uses the custom replacement 914EV motor support crossbeam, while the early model 914 with the tail-shift transaxle uses the existing stock 914 crossbeam.

Is there another location for the charging receptacle besides behind the front license plate?

• Later model 914 bumpers are heavier and use shock absorbers to meet U.S. safety standards, which makes the area behind the front license plate impractical for mounting the charging receptacle.
• An alternate location is in either side grille next to the engine deck lid, but the preferred solution is to backdate the late-model bumpers to the earlier 914 style, which provides a clean and accessible mounting location behind the license plate.

Electrical System

How do I monitor the battery pack and EV systems while driving?

• This conversion uses the Dilithium EV Display, which integrates directly with the Dilithium MCU. It provides real-time readouts of pack voltage, current and kW, state of charge, battery temperature, and average cell voltage with variation.
• The Dilithium MCU can also connect to the Torque Pro app running on an Android tablet via CAN bus and Bluetooth, providing an alternate display option.
• Both display solutions fit cleanly in the 914 center console.

Why is the Dilithium Design MCU used as the BMS in this 914 EV conversion?

• The Dilithium MCU serves as the battery management system for the entire pack while also providing several other system control functions.
• It uses a simple control-line interface for programming and requires only a single twisted wire pair to communicate with the battery boxes. This eliminates large wire bundles carrying cell data and keeps all high-voltage cell taps safely contained inside the battery boxes.

Could the high currents in the motor and controller interfere with other EV systems?

• Yes. Electrical interference is always a consideration in EV systems.
• In this conversion, the original heater ducts - no longer used for cabin heating - are repurposed as protected wiring conduits.
• The low-voltage signal harness runs through the driver-side heater duct, while the component power wiring runs through the passenger-side heater duct.
• The high-voltage cables connecting the front and rear battery boxes run through the center tunnel.

What powers the lights, audio and other accessories?

• A 12-volt battery initially powers the system when the key is turned. Once the system is active, a DC/DC converter taps high voltage from the main battery pack to produce 12 volts for all of the original accessories.
• The converter also keeps the 12-volt battery charged whenever the ignition is on.

Driving and Operation

How do I learn about driving and operating my new 914 EV?

• In the appendix of the Conversion Guide is a 914 EV Owner's Quick User Guide, which explains how to drive a manual shift electric vehicle, charging in public and at home, basic functioning of the additional EV dash switches and instrumentation, battery pack monitoring and health, controller cooling, and transport and storage of your 914 EV.

What additional controls will be added to my dashboard?

• Several additional switches are installed to control EV-specific functions. Repurposed stock 914 switch assemblies can be used to preserve the clean Porsche dashboard appearance.

• Reverse switch — turns the motor in the opposite direction for backing up
• Regen disable switch — places the vehicle in coast mode by disabling regenerative braking
• Dual-charger switch — enables both onboard chargers for faster 240V Level 2 charging
• Three-position heater switch — controls cabin heat output
• Two USB panel mount receptacles — laptop connections for MCU and controller programming
• Center console EV display — gives real-time monitoring of all EV systems

Why does this 914 conversion still have a clutch and shift lever?

• Like most classic EV conversions, this 914 EV replaces the gasoline engine with an electric motor while leaving the original drivetrain intact. A lightweight flywheel, clutch, and pressure plate are installed on the motor shaft, and the motor then mounts to the transaxle using a custom adapter.
• Because the electric motor has a wide powerband, less shifting is required. Since the motor does not need to idle, the car can remain in gear while stopped, reducing overall clutch wear.
• The result is a familiar 914 driving experience — just smoother, quieter, and powered by electricity.

How is the cabin heated?

• The original 914 used engine heat to warm the passenger compartment. Since the gasoline engine is no longer present, cabin heat is provided by a three-speed ceramic core electric heater powered by the main battery pack, which provides ample heat for the small 914 interior.

What maintenance does an electric 914 require?

• Electric drivetrains require very little routine maintenance. There are no oil changes, spark plugs, carburetors, or fuel systems to service.
• Routine attention is limited to normal vehicle items such as brakes, tires, suspension components, and periodic inspection of electrical connections.

Batteries and Charging

What range can I expect?

• This conversion uses seven Tesla Model S battery modules.
• Total pack capacity: 37.1 kWh
• Typical converted vehicle weight: ~2400 lbs
• Typical real-world efficiency is 290–300 Wh per mile, resulting in an estimated range of about 120 miles. Actual range will vary depending on driving style, terrain, and conditions.

How long does charging take?

• The conversion uses two onboard chargers that can operate from either 120V or 240V AC power.
• Typical charge times:

• 240V with both chargers: ~6 hours for a full charge
• 240V with one charger: ~12 hours
• 120V charging: roughly double these times

• In typical daily use (about 40 miles of driving), recharging usually takes 2–3 hours. Most owners simply plug in overnight, similar to charging a phone.

Can I use batteries other than Tesla Model S modules?

• Many battery options exist for EV conversions. However, the battery boxes and mounting hardware in this conversion are designed specifically for Tesla Model S modules. All instructions and diagrams in the Guide assume the Tesla modules.
• Using a different battery type is not covered by the documentation.

Is working with high voltage dangerous?

• Electric vehicle battery systems operate at high voltage and must be handled carefully. The Guide is very clear about the proper sequence for safely working on the vehicle, including disconnect procedures and safe handling of high-voltage components.
• Following these procedures allows the system to be assembled and serviced safely using standard electrical safety practices.

Components and Hardware

How do I source all of the parts needed for the conversion?

• The rear appendix of the Guide includes a complete printed Parts List for every EV component required for the conversion.
• The document also includes a QR code that links to a live online version of the list. The online version contains direct links to vendor product pages for each component.

How do I mount the EV components in the vehicle?

• The mounting brackets offered in the online store are custom components designed specifically for installing EV hardware in the Porsche 914, including:

• Motor
• Battery boxes
• Controller
• Chargers
• DC/DC converter
• 12-volt accessory battery
• Relay box
• Clutch switch

• These brackets are sold as a complete bundle matched to your 914 model year and motor mounting method. They are not sold individually.

Why are there different mounting bracket bundles?

• The correct bundle depends on how you plan to mount the motor.
Two options are available:

• NetGain cradle mount bundle
• EV West HyPer9 HV custom end-bell mount bundle

• Choose the bundle that matches your motor mounting configuration.

Online Store

Why is there a section for large format diagrams in the 914Electric online store?

• This is a collection of all of the diagrams that appear in the appendix of the Conversion Guide. Each diagram is a high resolution color print generally sized to 36 x 48 inches, and suitable for hanging on a shop wall for reference or for display.
• These diagrams are sold as a complete suite, and not sold separately.

How do I get a pair of those cool "ELECTRIC" transfer decals for my 914 EV?

• These transfer decals, styled in the original Porsche 914 font, are available in the Accessories section of the online store.
• They are applied to the rocker panels under each door using the same method as any standard pressure-sensitive vinyl decal.