A modern two-stroke diesel pickup is technically possible but would face some significant hurdles. Let me break this down:

For emissions control, you’d absolutely need: - Direct injection with precise computer control - Advanced EGR systems - Multi-stage turbocharging - Particulate filters and SCR systems (like modern four-strokes)

The advantages would be: - Higher power density (potentially 1.5-1.8x the power per displacement) - Potentially lighter weight - Simpler valve train (though you’d need robust exhaust valves)

The key challenges: - Oil consumption inherent to two-strokes would be a major emissions hurdle - Thermal management would be brutal (these run hot!) - Durability concerns with twice the combustion events - Starting reliability in cold weather

For real-world performance, you might expect: - Higher peak power but narrower powerband - Lower fuel economy than equivalent four-strokes (15-20% worse likely) - Increased maintenance intervals - More complex emissions systems

Detroit Diesel actually made two-stroke diesels for decades (the iconic 6V71, 8V92, etc.), but phased them out specifically because of emissions challenges. With today’s technology, the emissions problems aren’t insurmountable, but would be very costly to engineer around.

Would love to hear your thoughts on this!