direct injection carbon build-up ... - Alfa Romeo Forum
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Lightbulb direct injection carbon build-up ...

... or how we might make better use of water injection (JBSmith, hope you are readying this ) or FlushLube systems. also, this very much related to oil catch can solutions that Jaba was describing in his thread (Alternative Catch-Can Project)

but, first short introduction to carbon build up:
  • here is nice video explaining the problems and some of the solutions
  • this is how people do de-carbonation of the BMW engines using the tool you could buy at BMW
  • this guy explains one of the simplest methods for de-carbonizing (please follow his instructions carefully in order not to damage the engine; you do this on your own risk!)

so, when I saw what JBSmith has installed in his car (from another thread) had a thought if some performance/lubrication improvement gadgets that we install could be used also for de-carbonizing of direct injection engines (JTS, diesels ...) as well. one could install only spray nipples for the de-carbonizing purpose only, as well. 3.2JTS inlet manifold is casted aluminium, others on 939 series engines are plastic.

for performance/lubrication improvement or de-carbonizing purpose only, we could combine the purposes of those systems, if we properly position those water/chem injectors

to my best understanding, ideal place to position it would be AFTER the electronics (flow meter, pressure & temp gauges). on my 3.2JTS that would be just behind plenum, at the very beginning of the runners

next observation would be that I do not like pouring water from glass/plastic cans or hoses (that is part where you could damage the engine if too much). I would prefer more solutions which have nozzles that atomise the water more. even this kind of solutions are better than simple pouring. more profi style look like this and this. air supported ultrasonic version here. more specialised nozzles here. the better atomisation, it is better reduction of the air temp (but be carefull with this, might lead to icing of the inlet manifold).

but, this are all the ways how to deal with the consequences!

if we want to deal with the route cause, than might be good to check what Jaba was doing on his thread (Alternative Catch-Can Project)

either oil catch can (with all its PROs and CONs environMentally speaking) or e-Vac Savange. with e-Vac system from one side thing would be better to do this in front of CAT (to burn the oil mist to more acceptable particles) but am worried will that make any issue with the CAT etc.
Philjay50 and Viking like this.

  • 146s 1.3 & 1.6 boxer (man I loved those cars!)
  • 156 1.6TS (sold it only since I wanted more power)
  • 159 2.2JTS SW (sold it only since I wanted more power)
  • now driving 159 3.2JTS Q4 SW Ti
  • now driving also Vespa GTS 300ie Super
  • now driving also Aprilia Moto 6.5
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buildup , carbon , direct , injection

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