There are so many posts here that I don't have time to read them all so I hope I'm not repeating. If you remove the prechambers it won't even run. The reason tractor trailer rigs have been able to run direct injection is because of the relatively low rpms they turn. Car engines need prechambers to allow combustion at higher engine speeds. The new TDIs have pistons that have been totally been reshaped to act like a prechamber. If you saw the top of a TDI piston you wouldn't believe how radical it is.

Peter

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