Evo Dyna standalone ignition
Keeps the carburetor, swaps only the igniter for Pistonix Forge in ignition-only mode.
1984-1999
Harley-Davidson Evolution Big Twin (Evo)
The Evolution engine (1984-1999) powered an entire Harley generation — Dyna, Softail and Touring before the Twin Cam. Most run a stock carburetor with a simple mechanical ignition module. Pistonix Forge enters as a retrofit: it replaces the standalone igniter (programmable 3D RPM × MAP curve) and, optionally, converts to EFI with an aftermarket throttle body. Roadmap entry, no committed window.
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
- Generator (rotor) sensor or an externally mounted retrofit VR. Trigger pattern depends on the retrofit.
- Trigger wheel
- Stock: VOES module + mechanical pickup. Retrofit: 32-2 or 36-1 wheel.
- Knock sensor
- Aftermarket Bosch piezo recommended on builds with worked heads.
- Coils
- Stock dual-tower coils (wasted spark) or IGN1A smart coils when retrofitting.
- Ride-by-wire
- Not applicable — mechanical throttle.
- HDLAN
- Not applicable.
Practical notes
What you need to know.
- Hardware retrofit is required (crank sensor, coils, throttle body if you go EFI).
- Good fit for owners who want to keep the carbureted soul and add a programmable ignition curve.
- Full EFI conversion calls for fuel system planning (in-tank pump, regulator, return line).
- No launch window yet — comes after Forge stabilizes on Twin Cam.
Typical builds 01 02 03
Where we have seen it run.
Evo Softail carb-to-EFI
Aftermarket throttle body + injectors + return-style fuel + Pistonix Forge full EFI.
Evo performance build
Stage 2/3 with worked heads and cams. Custom ignition curve via Pistonix Tuner.
Pistonix Garage
Basemaps ready for this platform.
No basemaps published yet for Harley Evolution Big Twin. 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