RACER Mailbag Summary: Key Insights from an Expert Community

Questions and Insights

Hybrid Four-Wheel Drive in IndyCar?
In a recent query, a fan suggested considering a hybrid four-wheel-drive layout for future IndyCar models, following similar concepts used in the WEC LMP1 hybrids. Marshall Pruett acknowledged the potential benefits of all-wheel drive for weight distribution and traction, especially in wet conditions but noted that the feasibility of integrating such a system into the current Dallara chassis is challenged by size constraints and added weight.

The Stagger Debate
Another reader sought clarity on IndyCar’s use of stagger in tire construction. Pruett confirmed that stagger is still designed into Firestone’s oval tires, particularly for the Indy 500. However, modern tire technology has made it more challenging for teams to manipulate tire sizes through inflation as was common in the past.

PREMA Racing’s Future in IndyCar
Concerns about PREMA Racing’s potential return to IndyCar in 2026 were raised. Pruett indicated uncertainty, highlighting a lack of communication from PREMA leadership, despite indications of investment and interest in continuing. The team is scheduled to participate in group tests in February, but consistent engagement with fans and the series remains lacking.

Rookie Class and Team Changes for 2026

Expect a strong class of rookies in 2026, with notable drivers like Caio Collet (Foyt), Dennis Hauger (Coyne), and potentially Mick Schumacher (RLL). The second car for Coyne is still unconfirmed, with rumors of returning driver Romain Grosjean.

Technical Evolution of the IR28
Questions about the IR28’s unchanged suspension and wheel sizes were addressed. Pruett noted that while cornering speeds were impacted by the hybrid component’s weight, the current DW12 model remains competitive without substantial design changes. The new vehicle targets reductions in weight and increases in horsepower.

Engine Regulations and the Future

Concerns about the lack of new manufacturers entering IndyCar were highlighted, with a focus on the upcoming 2.4L engine regulations set for 2028. Pruett emphasized that the new regulations will demand entirely new engine designs rather than modifications to existing models, aiming to create a competitive environment that attracts diverse manufacturers.

Push-to-Pass System Continuing
The push-to-pass feature will be retained in 2028, although the specific mechanics—whether it leverages turbo or hybrid systems—are yet to be finalized.

Closing Remarks

The dialogue also touched upon the overall state of IndyCar’s engine competition, with Pruett assuring that there are no plans to eliminate this aspect. The series, particularly under Roger Penske’s ownership, remains focused on maintaining a vibrant competitive landscape amidst evolving industry dynamics.

This summary reflects the ongoing evolution and strategic challenges within the motorsports realm, especially for the IndyCar series as it prepares for significant changes in the coming years.