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Honda relying on FIA to address F1’s PU compression ratio controversy

Honda unveiled its RA626H PU and new logo in Tokyo on Tuesday

Honda has made it clear that it hopes that the FIA will address the compression ratio controversy that is set to overshadow the start of the F1 season.

Mercedes and Red Bull Powertrains are believed to have found a loophole that allows them their new PUs at a more favourable compression ratio on track than the 16:1 limit prescribed by the rules and which is measured at ambient temperature.

Honda, Ferrari and Audi have expressed their concerns to the FIA, and the matter is set to be discussed by the governing body and the manufacturers in a meeting this week.

Speaking at the launch of the 2026 F1 power unit in Tokyo on Tuesday Honda president Toshihiro Mibe indicated that the company is relying on the FIA to address the situation.

“Regulations do not have everything listed very clearly, bit-by-bit,” he said. “So in the new regulations, we look into the possibility of the new technology for each of the different power units. There is a lot of room for interpretation as well, and this is also part of the race.

“So for the FIA, it’s up to them to decide on whether it’s good or bad, so they have to take on it. For Honda, we have a lot of different ideas, and we would like to discuss with the FIA to understand if our ideas are accepted or are not okay.

“So I think that’s how we’re going to proceed. So we would always look to the FIA to consult them on regulation related matters.”

Aston Martin F1 team chief strategy officer Andy Cowell – whose former HPP colleagues are responsible for both the Mercedes and RBP/Ford projects – also put the onus on the FIA.

“The topic of compression ratio, there’s always a topic that bubbles up when new regulations come into place,” he said. “And every competitor reads the regulations and pushes performance to the limit.

“Compression ratio is clearly a key thermal efficiency enabling aspect of an internal combustion engine, so you always push it to the limit. So I’m sure every single power unit manufacturer is doing that.

“And as mentioned, the FIA have the job to make sure that everybody interprets the regulations in a fair and equal way. Which is what’s ongoing at the moment.”

HRC president Koji Watanabe was circumspect: “There are a lot of factors that need to come in discussion. So there’s more to it. So we would like to keep that aside for now, but then we want to make it clear that we want to meet and comply to the regulations.”

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VCARB makes RB20 rear suspension switch in quest for sixth

VCARB has upgraded to RBR’s 2024 rear suspension

RB has updated its VCARB01 chassis for the last three races by taking the rear suspension from the Red Bull RB20 – and the team is confident that it can recover sixth place in the World Championship after falling back to eighth.

In recent years the Faenza outfit has started the season with the previous year’s Red Bull suspension.

Last year it upgraded to what was then RBR’s current spec in Singapore, and this year it has made the move in Las Vegas.

The mechanical changes have been combined with updates to aero parts around the rear wheels.

“It’s a new rear suspension so it gives us both an aerodynamic update and a mechanical update,” said racing director Alan Permane. “So it should improve lap time.

“There’s a bodywork and a brake drum furniture update as well. All those areas interact together, of course, that’s why it’s all three parts are updated.”

Regarding the timing he said: “It was a conscious decision on our part to take it for here, rather than take it earlier in the season.

“I don’t want to say it was easy. It’s what teams are good at, bringing in updates and changing things and developing cars and making prototype parts very quickly and getting them onto cars.

“So it’s been a fantastic job by everyone, certainly in our factory in Faenza to get it, firstly, pre-fitted, and everything going together well and then getting quantities here for us to race with.”.

Permane is confident that the changes will bring performance and give the team the boost that it needs.

 “It should be good, from what we see in our in our offline sims and in our simulator, it gives us a little bit,” he said when asked by this writer about the potential gains.

“I think if we put – not if we put, we will put three perfect weekends together – we can do the job.

“Some of it depends on where Aston Martin are, honestly, and they’ve been a little bit up and down. They were certainly down in in Brazil, but I’d expect them to bounce back from that as well.

“It depends on where they are, and what points are available. We need to make sure we just do the best job we can and be the top of that midfield group.”

VCARB has been in a fight for sixth with Haas in the constructors’ championship with the US-owned team recently grabbing the advantage.

However both teams were then demoted a place when Alpine bagged two podium finishes in Brazil.

“These things happen,” said Permane. Take nothing away from Alpine, both drivers did a phenomenal job in the race in Brazil, and it wasn’t just pure fluke, they were quick, and we were quick as well.

“And a poor safety car timing unravelled our race, so these things happen. We’re confident we can get back to sixth.”

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