Hoffman900 wrote: ↑21 Mar 2022, 06:14
ryaan2904 wrote: ↑21 Mar 2022, 06:13
Hoffman900 wrote: ↑21 Mar 2022, 01:04
I would have a real hard time believing the resin in the lift pump would break down with 5% more ethanol content. Everything in the US is E10 since they banned MTBE as an oxygenator and the fuel issues people had early on were due to it cleaning gunk out of the tank, not plastics. If they switched to E85 that would be a different story.
Heating of the fuel could be an issue, especially depending on packaging.
Vibrations inherent to the Honda could also cause the fuel lines / pumps / etc to go into resonance. This is far fetched but you can observe this with side draft carburetor engines. If you are brave, stand next to the engine on the dyno and you won’t be able to grab the float bowl. The carburetor bowl will resonate at such frequency at certain bad harmonics that the fuel foams. The lift pump pressure is probably nothing wild. I forget what the injector pressure has to be. I recently learned it’s 5000psi in DTM. I would have to think about this a little harder before I put any stock as an actual failure mode.
I am not shocked to learn teams in general struggled some with the switch, especially if they, like Honda, are using a hybrid HCCI / TJI combustion concept. I believe Honda only made this combustion concept work reliably by having a fuel developed especially for it. Otherwise it was inconsistent and more a happy accident than anything going by Wazari’s posts.
It is interesting that the RBR cars complained of decreasing power prior.
If fuel was falling off, then the engine would be derating itself, but this absolutely would have showed up along pit wall along with fuel pressure (I have no doubt that is sent to pit wall as well) and I believe would have resulted in a grenaded IC much more quickly.
Gasly’s failure was sudden, so that looks to be an entirely different issue and if that is the cam driven injector pump, that is a Honda part / design (which goes back to my one hypothesis about resonance) as that is directly bolted to the engine and not soft mounted like fuel lines should be.
This is bullshit
Elaborate, please. Tell me why it is and offer up a sound explanation backing it up.
According to The Race, they basically ran out of gas due to miscalculation of the heat of the fuel at low fuel levels because they didn’t do any race simulations down to that level. I don’t know if that is true or not, but it is a theory.
The gas pump, specifically the low-pressure pump that brings the gas from the tank to the injectors, was discovered as the source of the engine's poor performance. A situation like this clearly had a negative impact on the engine's ability to perform at its best, which is why the team initially modified the engine map in hopes of at least getting around the issue.
With a lower engine map, the hybrid part of the power unit must work harder to provide the same output. As a result, the battery drains significantly faster than before. To ensure that energy is constantly available to the driver, greater SoC (state of charge) settings are required, which instruct the ERS to collect as much energy as possible during braking. This is why VER & PER cars flashed under braking because they were recharging their batteries.
The gas pump fails at the point where the pump no longer provides fuel to the car. Max saw his car switch off in the back straight, while Perez's car just retired in the middle of the first corner, locking the rear, making the car spin, taking him out of the race.
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Red Bull estimated that they were three-tenths of a second slower than Ferrari. Ferrari drove with more downforce because they can afford it with their engine power. Red Bull paid with smaller wings and more tire degradation. Ferrari has the strongest PU now, they have more power than last year despite the switch to E10 fuel. Both Honda & Mercedes lost performance compared to last year.
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Last time Honda considerably the best engine in season, it so sad that Ferrari jumped Honda as the best engine.
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https://ibb.co/z2ymXMs
(Quoted from various sources)