Super-diesel?
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Postmaster
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From: Honkytonkville
Super-diesel?
I was just thinking, why is it that you always hear about turbocharged diesel engines, but not supercharged diesel engines? Is there something in a diesel that makes the use of a supercharger less desirable? Also, in these older diesels, is there any way to detune the motor once a turbo has been added, for fuel mileage purposes? Just giving things some thought, wanting to get a little more out of my hard earned cash. 
Thanks guys.
Scott
Thanks guys.Scott
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Joined: Nov 2002
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From: Concord, NC
All two stroke diesels are supercharged; Some have a turbocharger in addition to the supercharger. The only reason I can think of that superchargers aren't used on four stroke diesels is that a positive displacement supercharger would build boost at low rpms, and since diesels don't use throttle plates, that might create a problem. Whereas with a turbo, off boost, the engine acts like it is normally aspirated. The turbo is likely more efficient as well. The two stroke must have a supercharger to get enough air into the cylinder since there is not a full downward stroke of the piston to suck air into the cylinder. I could be way off base here, and if so, someone please correct what I've said.
Post Fiend
Joined: Nov 2003
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From: Nutter Fort, WV
The main reason is it takes horsepower to run the supercharger but the turbo is almost power requirement free.
Superchargers also require a drive belt and mounting location where space is already tight.
Superchargers also require a drive belt and mounting location where space is already tight.
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From: Honkytonkville
I am familiar with the workings of the 2 stroke diesels, sounds like you are correct there. Anyone have anymore information on whether or not you can de-tune international/ford diesels(6.9L) after you've added a turbo kit to gain fuel mileage? With soaring fuel prices I am heavily considering a turbo on the old diesel and selling the gasser I drive daily now. The reason I ask about the supercharger is that I have an old centrifugal blower off of an EFI Chev 350.
Scottie
Scottie
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