1957 Ford Courier Sedan Delivery
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What is the black pipe coming off of the compressor side of the intake and running into the block for?
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IIRC from "my" ancient history (we had one at UTI) it is for CCV.
Going strictly off of my memory, and how it was explained to us un-trained-idiots, The supercharger develops more low pressure than the turbo can compensate for except for maybe under WOT and seriously high RMPS*.
Edit:
* 2000 RPM would be considered seriously high
Well from a gearheads point of view it works like this , the 71 series Detroit Diesels are 2 stroke engines. The supercharger ( blower ) is mandatory , the engine can't run at all without it. The blower forces air into the cylinder when the piston drops low enough in the cylinder to uncover intake ports on the cylinder walls. Every crankshaft revolution has intake , compression , power and exhaust.
In order to make additional power the turbo is added just like any other turbo diesel. Old school Detroits were governed at 2100 rpm instead of 1800 like 4 stroke Cats , Cummins , Mack , etc.
What is the black pipe coming off of the compressor side of the intake and running into the block for?
View attachment 420046
IDK either. I stared at this for a bit. Looks like turbo AND supercharger? Why you would have a tube from the pressurized intake between the 2 and the crankcase, I'm not sure.
Well from a gearheads point of view it works like this , the 71 series Detroit Diesels are 2 stroke engines. The supercharger ( blower ) is mandatory , the engine can't run at all without it. The blower forces air into the cylinder when the piston drops low enough in the cylinder to uncover intake ports on the cylinder walls. Every crankshaft revolution has intake , compression , power and exhaust.
In order to make additional power the turbo is added just like any other turbo diesel. Old school Detroits were governed at 2100 rpm instead of 1800 like 4 stroke Cats , Cummins , Mack , etc.