mzso wrote: ↑17 Feb 2026, 17:30
diffuser wrote: ↑17 Feb 2026, 16:43
Glad to see some that understands what REALLY going on here.
Really? Because you both have the same fantasy?
I'm not forming a firm opinion until some solid info gets out. It could just as easily be that no-one cares, except Audi. And everyone's rushing their updates.
Or there's no trick at all, it's just a media hoax.
I said "Except they only added “measured at ambient temperature” on Oct 2025. That’s what triggered all the protests. If you write a rule where none existed before — just to save manufacturers money and make it easier for new teams — you shouldn’t create a giant loophole that requires ten times the research and development costs to overcome compared to keeping the original no-limit CR. It’s absolute madness."
Those are all facts.
To expand on the “pre-combustion chamber”: in the pre-2026 power units, most PU manufacturers integrated the pre-combustion chamber into a one-piece spark plug. This means that when you remove the spark plug, you are also removing the pre-chamber.
Since only one injector is permitted, the injector sprays fuel into the main combustion chamber through the pre-chamber assembly. When the spark is fired, ignition occurs inside the pre-chamber, which effectively turns it into a blowtorch. High-energy flame jets are then forced through small orifices into the main chamber.
This significantly intensifies the ignition process, effectively “supersizing” the spark and resulting in a faster, more stable, and more complete burn.
Note - In the 2026 PU regs, the material restrictions for pre-chamber are the same as the restrictions for the head. In other words, you can't use a random metal that expands a lot with heat and therefore reduce the CR.