Carl Brothers

I've ordered a 2021 Sierra 2500 HD with the 6.6 liter GDI motor. It'll be here around Feb. 27th. Don't know how well it'll work, but, I'm installing a water injector set up between the MAFS in the air inlet tube and hat on the intake manifold. I used to run water injectors back in the late 70's and 80's and aside from letting me get away with running street gas in a high compression engines, it also kept the cylinder heads and piston tops totally carbon free after many miles between teardowns to fresh these motors up with new rings and bearings. Still not sure if it'll help with carbon build up on backside of intake valves, but, I'm going to give it a shot.