Late to the party here, so I don't expect this to get a lot of traction, but I'd like to point out that part of the reason this hasn't existed until recently as an option in the US is because it's functionally illegal for it to exist. > The 12-valve Cummins is arguably the most widely understood diesel engine in North America. Every independent shop, every shade-tree mechanic with a set of wrenches, every farmer who…
> US is because it's functionally illegal for it to exist. This feels like one of those 'burying the lede' situations. Can you explain what's functionally illegal (and I admit that I'm mildly curious about the distinction of functional illegality and non-functional illegality) about this existing? I'm as breathless as you are, after reading that second paragraph, but I nonetheless remain ignorant about the nuances of…
In terms of legality, it means manufactures need to include all of those systems and their associated complexity, but the way that this startup is getting around it is using engines that were built before those requirements and are thus grandfathered into not needing them.
Also on the legal side, there's a thriving black market of mechanics who are willing to rip all those systems out of diesel engines. It's not uncommon to see double-digit percent increases in both power and fuel economy after it's done. The EPA has prosecuted a few cases against shops and parts suppliers for those "diesel deletes"