Honda's engine upgrade lifeline in limbo after unexpected vote suspension

Honda’s hopes of securing additional engine upgrade opportunities through a Formula 1 rule change are currently in limbo. A crucial vote on the matter was unexpectedly pulled at the eleventh hour, leaving the Japanese manufacturer's recovery plan uncertain.

The ADUO lifeline

According to F1's technical regulations: "ADUO homologation upgrades are not cumulative within a season and will only be granted following the first occasion that the PU manufacturer is assessed by the FIA as eligible for ADUO according to the criteria in this article."

Lifting this cap would potentially allow Honda to implement multiple developmental steps to move forward, rather than being restricted to a single upgrade. Crucially, one of the most significant benefits would come in the form of cost cap adjustments, granting Honda the ability to deploy extra resources to unlock greater power unit potential.

A suspended vote and regulatory uncertainty

The proposal to aid Honda was part of a broader vote presented to F1's Power Unit Advisory Committee (PUAC) over the past week. The PUAC consists of a representative from FOM and the FIA—who share a combined single vote—alongside each of the current manufacturers, including Cadillac, who are preparing for their Miami Grand Prix debut.

For any rule change proposal to pass, a super-majority is required. This necessitates support from the F1/FIA representative, as well as all but one of the involved manufacturers. The deadline for voting on this package of ADUO revisions, which included the specific tweak aimed at helping Honda, was understood to be earlier this week. The outcome of the ballot was widely expected to be made public over the Miami Grand Prix weekend, a race already anticipated for upgrades, rule tweaks, and a new F1 pecking order.

When asked on Thursday morning about the situation, Honda's trackside general manager and chief engineer, Shintaro Orihara, stated: "We are waiting [for the] FIA on this. We will follow the FIA decision."

However, the outcome that emerged later that day caught all manufacturers off guard. Sources revealed that the vote had been suspended after the count was completed. While no formal explanation was provided for this sudden halt, one source suggested it was linked to a further review of the regulations.

This suspension implies that the laid-out proposals may not have garnered the necessary support to be pushed through. It is possible that one or two manufacturers are pushing for further revisions before committing their support.

Consequently, uncertainty continues to surround the wider ADUO situation. The regulations have yet to confirm whether the first cut-off point to determine ADUO eligibility will be moved to after the Canadian Grand Prix in late May, or if it will remain after the sixth race of the season—which, due to the cancellation of events in Bahrain and Saudi Arabia, is now the Monaco Grand Prix a fortnight later.