Technology has significantly advanced high-performance vehicles, particularly through modern electronic fuel injection (EFI) systems. A notable innovation is the dual fuel system, which enables vehicles to switch between pump gas and methanol, enhancing power for drag-and-drive applications.

Chuck Stefanski’s Pontiac wagon exemplifies this innovation, utilizing a Holley Dominator ECU to manage the fuel transition. The ECU’s software allows for configuring multiple injectors, enabling the use of up to 16 sequentially fired injectors. Stefanski’s system includes 42 lb/hr injectors for pump gas during idling and driving, while 600 lb/hr AFIS injectors activate under boost for methanol.

Unlike typical setups that pair pump gas with E85—using flex-fuel sensors—the methanol transition is more complex, as current sensors don’t accommodate methanol. The Holley software plays a crucial role, adjusting fuel maps based on engine load, RPM, and boost to ensure a smooth transition while minimizing engine wear. Rick Trunkett from Big 3 Racing emphasizes the importance of meticulous tuning, as the computer relies on stoichiometric ratios to adjust fuel flows between gas and methanol.

While creating a dual fuel system requires advanced tuning knowledge, it allows racers to enjoy street-like drivability with the capability to unleash extreme power on the track, making it an invaluable strategy for modern drag-and-drive racers.



Source: www.dragzine.com