I have installed several Co2 extinguisher systems into turbo diesel set up's . These were mainly on marine & heavy plant applications using adapted Co2 extinguishers . You remove the delivery horn & hosing , with a nozzle fitted ahead of the turbo inlet .The system was triggered by a manual cable such as
http://www.demon-tweeks.co.uk/motors...dle-pull-cable . once pulled the bottle empties completely , leaving you able to deal with other matters . CO2 is best as it does not leave any residue ( like powders or foams ) is CHEAP ! ! ! ! ! ! ! and it works ! . One 9kg CO2 was enough to stop a Caterpillar C32 (32lt ) that got too excited . Modern engine running very light oils 0w-30 & the like are far easier to whip into a froth & vapour that the engine can then begin to burn along with injected fuel and once the engine is up to temperature and working at speed , the oil mist can become an unstoppable fuel supply . Also due to many modern cars being auto of some form or another , stalling is not a solution , so blanketing gas is your only hope . ALSO DO NOT attempt to restart a runaway until you have removed any source of excess fuel . Inter coolers can hold huge amounts of oil that gets airbourne once the turbo starts blowing hard . I have removed & scrapped an engine to the tune of £107,000 after it ran away . The "brave" soul using it removed the turbo inlet & jammed a large rag into the turbine , we found it wedged into the intercooler , having been throught the blower & pipework