This is the section from the 2015 rule book. Refers to Vintage engine in a VINTAGE category body only.Special Construction and Vintage Categories only.
For reasons of historical authenticity, vintage engine modifications and equipment used shall be restricted to older technology levels, so far as is practical. Accordingly, in classes XO, XF, XXF, XXO, V4 and V4F, using Vintage bodies:
1. Turbochargers are not permitted.
2. Computers (2.Q) are allowed for data collection purposes only.
3. Electronic fuel injection prohibited.
4. Any ignition system may be used and may employ a crank-trigger magnetic pick-up. Timing may be "pre-programmed" or "mapped" and apply a preset
timing curve and rev-limiter. However, the ignition system shall not be "interactive". That is, the ignition system shall not make "variable real time" engine management changes while running based on sender or sensor inputs. For example, manifold pressure sensor, O2 sensor, knock sensor, wheel speed or gear change sensors, etc. Entrant is responsible for demonstrating compliance.
Good luck,
DW