Re: What exactly makes a diesel smoke under a load

Posted by Joe-Bob/IN on August 24, 2006 at 20:07:36 from (216.241.134.9):

In Reply to: What exactly makes a diesel smoke under a load posted by carpenter in belmont on August 24, 2006 at 16:43:51:

I have read several times in this post that a turboed engine is less apt to smoke, however in my experience the turboed engines are more apt to smoke. And I think I know why, when you are at low rpm's and open it up you introduce extra fuel but the turbo isn't up to speed yet to compensate and add the extra air therefore you get the black smoke till she gets spooled up. Now lets say you are running under a good load and all is up to speed and such then you hit a tough spot, the engine slows a bit as does the turbo till the governor adds more fuel to keep the r's up to the set level. Engine slowly gains speed as does turbo but not in proportion to the fuel being introduced till the extra fuel makes extra heat to speed up the turbine then you get extra power and everything is back to balance, assuming the engine has the available power to regain the preset rpm's. Anyway, during the slowed r's you don't have enough air to cleanly burn the fuel and since diesel is a dirty fuel it blows black smoke. Not too many things better than seeing a nice Case 504 engine under tremendous load (or any other diesel!) and smoke heading towards the sky! It takes a close third to my neighbor in her bikini, right be my wife wearing anything or nothing!

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