Hacker News: pseudoralphhttps://news.ycombinator.com/user?id=pseudoralphHacker News RSShttps://hnrss.org/hnrss v2.1.1Thu, 02 Jul 2026 17:00:30 +0000<![CDATA[New comment by pseudoralph in "Internal Combustion Engine (2021)"]]>Fiat (and other's I'm sure) have the [MultiAir system](https://www.caranddriver.com/features/a16580674/fiats-multia...) which doesn't use cams to actuate valves

And here's an example of someone that retrofitted a Miata to use a similar [air-actuated valve system](https://youtu.be/E9KJ_f7REGw)

]]>Wed, 01 Jul 2026 23:38:10 +0000https://news.ycombinator.com/item?id=48754554pseudoralphhttps://news.ycombinator.com/item?id=48754554https://news.ycombinator.com/item?id=48754554