Honda Power Unit Hardware & Software

All that has to do with the power train, gearbox, clutch, fuels and lubricants, etc. Generally the mechanical side of Formula One.
GhostF1
GhostF1
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Joined: 30 Aug 2016, 04:11

Re: Honda Power Unit Hardware & Software

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Badger wrote:
21 Jan 2026, 01:46
Juzh wrote:
21 Jan 2026, 01:21
Honda throws cold water on the-race's absurd claims of lacklustre battery tech.

https://global.honda/en/F1/features/202 ... ry/kakuda/
When it comes to the battery, is it fair to think that the performance advantage from the previous PU can be carried over?
“That’s what we believe—and what we hope. Even after the decision to end our activities, battery development continued, not limited to F1 alone. Because of that, it has evolved further, and it’s an area we’re confident in.”
What performance advantage? No one can look at the traces from last season and tell me Honda had better deployment than Merc.
It was a well known fact, across the paddock, the Honda had a distinct advantage in it's deployment and regen abilities. It had been mentioned several times by Merc personnel as well. While their battery had a significant lifespan advantage over the season.

GhostF1
GhostF1
110
Joined: 30 Aug 2016, 04:11

Re: Honda Power Unit Hardware & Software

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It has been mentioned several times now.

2026 has banned split-turbos. So Merc and Honda have had to adjust. This plus the static compression ratio reduction, which nerfs their ability to use their rapid combustion technique, almost looks tailor-made to scramble any tricks/development breakthroughs anyone had found, to properly bring everyone down to square one again.
18:1 was only just enough, in combination with fuel composition work, to keep that combustion technique stable. Almost infuriating the FIA have introduced a regulation that directly reduces the efficiency of the ICE. Goes against their whole M.O for F1. In my opinion.

Badger
Badger
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Joined: 22 Sep 2025, 17:00

Re: Honda Power Unit Hardware & Software

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GhostF1 wrote:
21 Jan 2026, 10:05
Badger wrote:
21 Jan 2026, 01:46
Juzh wrote:
21 Jan 2026, 01:21
Honda throws cold water on the-race's absurd claims of lacklustre battery tech.

https://global.honda/en/F1/features/202 ... ry/kakuda/
What performance advantage? No one can look at the traces from last season and tell me Honda had better deployment than Merc.
It was a well known fact, across the paddock, the Honda had a distinct advantage in it's deployment and regen abilities. It had been mentioned several times by Merc personnel as well. While their battery had a significant lifespan advantage over the season.
I prefer to go by what I can actually see in the telemetry, and there Merc clearly had more deployment on energy limited tracks. Whether that was down to the battery, or the MGU-H, or something else, I don’t know.

GhostF1
GhostF1
110
Joined: 30 Aug 2016, 04:11

Re: Honda Power Unit Hardware & Software

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Badger wrote:
21 Jan 2026, 10:20
GhostF1 wrote:
21 Jan 2026, 10:05
Badger wrote:
21 Jan 2026, 01:46

What performance advantage? No one can look at the traces from last season and tell me Honda had better deployment than Merc.
It was a well known fact, across the paddock, the Honda had a distinct advantage in it's deployment and regen abilities. It had been mentioned several times by Merc personnel as well. While their battery had a significant lifespan advantage over the season.
I prefer to go by what I can actually see in the telemetry, and there Merc clearly had more deployment on energy limited tracks. Whether that was down to the battery, or the MGU-H, or something else, I don’t know.
I appreciate that and that's all well and good. It just goes against what a majority are seeing.

Badger
Badger
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Joined: 22 Sep 2025, 17:00

Re: Honda Power Unit Hardware & Software

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GhostF1 wrote:
21 Jan 2026, 10:22
Badger wrote:
21 Jan 2026, 10:20
GhostF1 wrote:
21 Jan 2026, 10:05


It was a well known fact, across the paddock, the Honda had a distinct advantage in it's deployment and regen abilities. It had been mentioned several times by Merc personnel as well. While their battery had a significant lifespan advantage over the season.
I prefer to go by what I can actually see in the telemetry, and there Merc clearly had more deployment on energy limited tracks. Whether that was down to the battery, or the MGU-H, or something else, I don’t know.
I appreciate that and that's all well and good. It just goes against what a majority are seeing.
Classic case of belief perseverance. Look at recent evidence instead of what was true in 2022.

Bill
Bill
7
Joined: 28 Apr 2018, 10:28

Re: Honda Power Unit Hardware & Software

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GhostF1 wrote:
21 Jan 2026, 10:11
It has been mentioned several times now.

2026 has banned split-turbos. So Merc and Honda have had to adjust. This plus the static compression ratio reduction, which nerfs their ability to use their rapid combustion technique, almost looks tailor-made to scramble any tricks/development breakthroughs anyone had found, to properly bring everyone down to square one again.
18:1 was only just enough, in combination with fuel composition work, to keep that combustion technique stable. Almost infuriating the FIA have introduced a regulation that directly reduces the efficiency of the ICE. Goes against their whole M.O for F1. In my opinion.
Most team are having problems with the news fuels apparently because the got components in them that combust at different temperatures so i doubt that having a pu with high compression ratio is a good idea .it could easily lead to engine knocking.

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Stu
Moderator
Joined: 02 Nov 2019, 10:05
Location: Norfolk, UK

Re: Honda Power Unit Hardware & Software

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Vappy wrote:
12 Jan 2026, 23:09
Snorked wrote:
12 Jan 2026, 17:47
It seems they’ll be releasing one segment per day until the full image is revealed on the 20th.

https://ibb.co/wNyDpP2N
Has anyone nailed what those two cylindrical fittings are on the top? For reference, this is the Honda RA621H:

https://upload.wikimedia.org/wikipedia/ ... RA621H.jpg
Not yet along with what @AR3-GP mentioned, we have also had throttle bodies (1 per plenum, plenums within V), now that the variable length inlets have been banned and FBW throttle is a torque request there could be efficiency gains to be had in reducing the number of controlled orifices. It would surprise me to see an air-air intercooler mounted above it (where the plenum is located on the last generation of PU’s).
Perspective - Understanding that sometimes the truths we cling to depend greatly on our own point of view.

GhostF1
GhostF1
110
Joined: 30 Aug 2016, 04:11

Re: Honda Power Unit Hardware & Software

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Bill wrote:
21 Jan 2026, 13:05
GhostF1 wrote:
21 Jan 2026, 10:11
It has been mentioned several times now.

2026 has banned split-turbos. So Merc and Honda have had to adjust. This plus the static compression ratio reduction, which nerfs their ability to use their rapid combustion technique, almost looks tailor-made to scramble any tricks/development breakthroughs anyone had found, to properly bring everyone down to square one again.
18:1 was only just enough, in combination with fuel composition work, to keep that combustion technique stable. Almost infuriating the FIA have introduced a regulation that directly reduces the efficiency of the ICE. Goes against their whole M.O for F1. In my opinion.
Most team are having problems with the news fuels apparently because the got components in them that combust at different temperatures so i doubt that having a pu with high compression ratio is a good idea .it could easily lead to engine knocking.
Completely. And that seems to be the general consensus. Although wouldn't we rather let the teams, manufacturers, engineers determine what's possible? Without the suits slapping an arbitrary limit that restricts them even trying.

Badger
Badger
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Joined: 22 Sep 2025, 17:00

Re: Honda Power Unit Hardware & Software

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Bill wrote:
21 Jan 2026, 13:05
Most team are having problems with the news fuels apparently because the got components in them that combust at different temperatures so i doubt that having a pu with high compression ratio is a good idea .it could easily lead to engine knocking.
That conflicts with the comments we've heard from the people who ought to know.

Ben Hodgkinson
From a purely technical point of view the compression ratio limit is too low. We have the technology to make the combustion fast enough, so the compression ratio is way too low. We could make 18:1 work with the speed of combustion that we've managed to get, which means there's performance in every tenth of a ratio that you can get. Every manufacturer should really be aiming at 15.999 as far as they dare when it's measured.