Zynerji wrote: ↑21 Mar 2021, 17:27I keep coming back to this on the Honda due to the cackle, but if high efficiency lowers exhaust temps, thus lowering MGUH power, is it possible that they "burp" the exhaust valve a tiny amount during the power stroke? Just small, loud, hot jets into the exhaust pipe, followed by the cooler spent gasses on the exhaust stroke?
I think those cackles are cylinder deactivation.
The frequency of these Hybrid engine crackles is just so low compared to times of the blown diffuser. In the new blown diffuer era the crackles were blurted out in a continuous stream, like a fast progression. These hybrid cackles are very spaced out and irregular. Even when accounting for the lower engine rpms the crackle sounds are still much much slower and spaced out. The engines working on a reduced number of cyclinders is a good theory for these noises.
I had theorized a few years ago in the Honda thread that while they are running on three cylinders they could be playing tricks with the other cylinders.
It could be big bang... It could be cold spraying fuel ( if only small amounts of it to cool the cylinders, or godlameroso's favourite topic..) into the exhaust... A bunch of stuff..
The other manufacturers are making these noises too but much quieter. Might be a function of the materials in Hondas exhaust system. Who knows.
I would love to ask Mr. Tanabe why the engines sounds thay way.
