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Water injection alone may not have been able to lower the NOx and soot to insanely all but non existent levels the EPA was demanding.
But with the added complexity of DPF and DEF systems they are targeted for removal and deleting.
If the EPA would have gone with something not as offensive to the wallet as water injection there would probably be a lot more trucks rolling around with the emissions systems fully intact.
Main problem with water injection is everything freezes and bursts. The DEF never really fully freezes it turns into a slush mix and as far as I can tell it doesn't bust lines, pumps solenoids and other controls.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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