I am building a water doping for a 300 1992 turbo diesel (6 cylinder 143 hp).
First editing and mistakes!
I had started with a steel reactor (14 mm rod in a 15/21 mm tube length approximately 20 cm) bypassing the exhaust tube and under the car so as not to completely modify my exhaust manifold and fault of place.
I had considered spraying by injector (for gasoline engine) powered by a pump (Bosch for gasoline) modified in stainless steel.
The control circuit was based either:
on an astable multivibrator NE555 therefore generator of slots controlled by the accelerator control,
either by a piezoelectric sensor detecting the opening times of a diesel injector ...
For the arrival of the "pantonized" gases I had made a simple copper tube (12/14) coming into the intake facing the turbo with a slight restriction on the rubber sheath.
difficult to find a gas pump not immersed, removable and not too expensive,
the piezoelectric circuit is not easy to produce for mechanical reasons and for filtering vibrations, but the opening of an injector seems to be detected by the deformation of the steel pipe.
the bypass installation and a little far, does not give enough heat despite good insulation with rock wool,
and above all big mistake there is almost no depression to suck something up, even by narrowing the duct a little more at the turbo inlet ...
And the steel for the tube etc it rust obviously!
So I redesigned my assembly and I am building a rectangular box crossed directly by the exhaust gases at the outlet of the turbo and containing 3 reactors 15 cm long and 10 cm rod all in 304L stainless steel, except the inside of the normal steel rod. The short gas outlet of the turbo is also sheathed in stainless steel tube. There is a slight restriction in the section for the exhaust to the outlet of the engine box.
For suction I have already tried a throttle throttle by a weak enough spring, in the intake upstream of the turbo, there suction is strong from slow motion but it should not too much if the engine s 'choking.
The spray water supply is provided by a mower carburetor which is already modified (with resin) to reduce the diameter.
The heating of the water is provided either by a copper tube winding around the exhaust (as my first assembly) or by the cooling circuit more stable in temperature.
The reheating of the air will be done by the old reactor (downstream) devoid of its rod (thus the tube of 15 / 21).
The construction of the exhaust outlet and the stainless steel box is currently my big job because the place is measured. It is therefore necessary to provide curvatures etc for implantation ...!
And I am not a welder, trainer, boilermaker, mechanic, etc. so I train myself at the same time!
Well, I'm not ready to go up and visit Christophe ...
But I do not despair, and a big thank you to all for your testimony and to André for his wise advice.