Shovelhead carbureted chopper
Keeps all the carb charm and adds a programmable ignition curve plus datalogger.
1966-1984
Harley-Davidson Shovelhead
The Shovelhead is an entire chapter of Harley culture — 18 years of engine that carried the brand through the 70s and early 80s. Carbureted, points ignition early, then electronic module. Pistonix Shovelhead enters as a retrofit programmable ignition (3D RPM × vacuum curve), with a future upgrade path to full EFI via aftermarket throttle body. Roadmap, no window yet.
Recommended ECU Pistonix Forge The base ECU. Forged from the ground up for Twin Cam and custom V-twin.
Alternatives: Pistonix Apex
Electronics
What is inside.
- Crankshaft
- Stock: mechanical pickup on the crank. Retrofit: external VR sensor with a 32-2 or 36-1 wheel.
- Trigger wheel
- A retrofit VR sensor is the only path to stable programmable ignition.
- Knock sensor
- Optional aftermarket Bosch piezo on performance builds.
- Coils
- Stock dual-tower coils or IGN1A smart coils in the retrofit.
- Ride-by-wire
- Not applicable.
- HDLAN
- Not applicable.
Practical notes
What you need to know.
- Crank sensor retrofit is required — you cannot keep the points pickup.
- Keeping the carburetor is viable — Pistonix Forge in ignition-only mode.
- Full EFI takes investment in an aftermarket throttle body, fuel pump and injectors.
- On the roadmap as a classic V-twin expansion wave — no committed timeline.
Typical builds 01 02 03
Where we have seen it run.
Shovelhead big-bore standalone ignition
96 ci pistons, cams. 3D ignition curve via Pistonix Tuner.
Shovelhead EFI conversion
More ambitious build — easy starts, better mileage, no dramas at altitude.
Pistonix Garage
Basemaps ready for this platform.
No basemaps published yet for Harley Shovelhead. Curated calibrations land at commercial launch — join the waitlist below to get notified.
Waitlist
Be the first to know.
Pistonix is under active development. Sign up for product updates, early basemaps, invites to ride at Milwaukee Garage Drag Racing events, and priority on the first batch of Pistonix Forge.
- Monthly roadmap and firmware updates
- Invite to pre-sale tuning sessions
- Priority on the initial Pistonix Forge batch
- Early access to per-engine basemaps