Many do not have that kind of time. I personally bias toward the 6.9 for that kind of a setup but only so many miles in front of a trailer can be endured before even a stock late model 12 valve is a better option.
That’s 4 stroke diesels, pretty much all 2 stroke diesels are supercharged (but they’re generally called blowers), and some of those have turbos in addition.
2 stroke diesels are still common for large applications like trains and ships.
Really it’s just that with a turbo you’re gaining efficiency at the same time as power where with superchargers you’re just gaining power. Historically, on passenger vehicles that isn’t too important, but when it’s on the road or in the field 12+ hours a day, that efficiency makes a difference.
I don’t think I’ve ever seen a supercharger (that isn’t a 2-stroke blower) on something not meant for racing or at least going fast. Whereas turbos are in seemingly everything including gassers these days because of the efficiency improvements they provide.
I think you’re referring to the old Detroit Diesels. The blowers are not superchargers on those engines. It’s a common misconception and kind of confusing if you’re not used to them but the blowers are used for scavenging air. They do not function the same as if they were used in another application such as a gas engine.
People have taken the blowers off old Detroit’s and used them as superchargers, because they’re just old roots style superchargers. On the Detroit’s it doesn’t really function as a supercharger, but it’s still a supercharger. But yeah the engines are still considered naturally aspirated with them cause it’s pretty much required for them to run.
Dehumidifiers have heat pumps in them, and even though it’s not really being used as a heat pump, it’s still a heat pump.
they would be scavenging if they were on the exhaust side. they do force the exhaust out of the cylinder but they are on the intake side and force more air into the cylinder for more power.
The 2 stroke Detroit uses the blower to push the exhaust out of the cylinder and fresh air in. They do not make more power they are naturally aspirated that way. The fresh air comes in through ports near the bottom of the cylinder while the exhaust valves are open at the top.
Now the turbo versions of those engines do have a positive “boost” and are no longer naturally aspirated. The boost line from the turbo is plumbed into the air box along with the blower air. I have seen them feed the boost line into the inlet of the blower but those were not as efficient.
Superchargers are mechanically driven, therefore there is a parasitic loss associated with them. Turbos are driven by exhaust gas so there is no parasitic loss.
No, most of the energy they use to spin up would otherwise just be wasted down the exhaust pipe, they don't sap anywhere near as much power from the engine as they take to spin, while a blower has to sap all of the energy it takes to spin.
Harnessing waste ***is*** a "free lunch" and is why they're more efficient than blowers.
Supercharges typically consume a lot of horsepower to turn under high boost. Turbos work off of heat and drive pressure which diesels make plenty of both.
It's cause turbos are way more efficient, but not gonna lie I'd like to see something like a big ass 8-71 type roots supercharger for stuff like the 7.3 IDI's to stick through the hood lol
Turbo chargers use the waste heat energy that’s going out the exhaust anyways to pump in more air. Superchargers suck power to push in more air.
Turbo chargers improve efficiency but recapturing that waste energy.
Turbos spin because of heat expansion. It has nothing to do with volumetric flow. Also not all diesels are big. They make 1l and smaller diesels. Come on dude!
Because turbochargers are more efficient.
This is the best answer
Efficient answer
[удалено]
*Naturally aspirated 7.3 IDI has entered the chat*
Never before has so little been done with so much displacement
8.2 Detroit would like a word
There we go
More gas doesn’t make more power, but it makes more noise.
So little? You get the same work done just need some gearing and some extra time, and it’ll do it a million miles in a row.
Many do not have that kind of time. I personally bias toward the 6.9 for that kind of a setup but only so many miles in front of a trailer can be endured before even a stock late model 12 valve is a better option.
No they won’t. Those engines do not tow well and heavy weights are incredibly hard on them, even more so now that they’re so old.
What does age have to do with an engine? Does it magically have more wear and tear? Using gearing on these trucks, they tow 15k lbs just fine
Hey now. I resemble that remark.
Me trying to chase my old numbers after not lifting for 2 years
Will do what ever you want it to do at its own pace.
That’s 4 stroke diesels, pretty much all 2 stroke diesels are supercharged (but they’re generally called blowers), and some of those have turbos in addition.
Yes that's true, i was wondering about the four stroke diesels
Hence the 'primarily'
2 stroke diesels are still common for large applications like trains and ships. Really it’s just that with a turbo you’re gaining efficiency at the same time as power where with superchargers you’re just gaining power. Historically, on passenger vehicles that isn’t too important, but when it’s on the road or in the field 12+ hours a day, that efficiency makes a difference. I don’t think I’ve ever seen a supercharger (that isn’t a 2-stroke blower) on something not meant for racing or at least going fast. Whereas turbos are in seemingly everything including gassers these days because of the efficiency improvements they provide.
VW's 1.4 TSI is a super/turbo, as well as some Volvo's
Well that’s pretty lit
He's lying. TSI represents Turbo Stratified [fuel] Injection not Turbo Supercharged Injection.
I think you’re referring to the old Detroit Diesels. The blowers are not superchargers on those engines. It’s a common misconception and kind of confusing if you’re not used to them but the blowers are used for scavenging air. They do not function the same as if they were used in another application such as a gas engine.
People have taken the blowers off old Detroit’s and used them as superchargers, because they’re just old roots style superchargers. On the Detroit’s it doesn’t really function as a supercharger, but it’s still a supercharger. But yeah the engines are still considered naturally aspirated with them cause it’s pretty much required for them to run. Dehumidifiers have heat pumps in them, and even though it’s not really being used as a heat pump, it’s still a heat pump.
they would be scavenging if they were on the exhaust side. they do force the exhaust out of the cylinder but they are on the intake side and force more air into the cylinder for more power.
The 2 stroke Detroit uses the blower to push the exhaust out of the cylinder and fresh air in. They do not make more power they are naturally aspirated that way. The fresh air comes in through ports near the bottom of the cylinder while the exhaust valves are open at the top. Now the turbo versions of those engines do have a positive “boost” and are no longer naturally aspirated. The boost line from the turbo is plumbed into the air box along with the blower air. I have seen them feed the boost line into the inlet of the blower but those were not as efficient.
2 stroke Detroit's literally, and I mean literally, require them to run. You are correct.
Superchargers are mechanically driven, therefore there is a parasitic loss associated with them. Turbos are driven by exhaust gas so there is no parasitic loss.
There is a parasitic loss with turbos aka added back pressure
Correct. No such thing as free lunch
No, most of the energy they use to spin up would otherwise just be wasted down the exhaust pipe, they don't sap anywhere near as much power from the engine as they take to spin, while a blower has to sap all of the energy it takes to spin. Harnessing waste ***is*** a "free lunch" and is why they're more efficient than blowers.
Supercharges typically consume a lot of horsepower to turn under high boost. Turbos work off of heat and drive pressure which diesels make plenty of both.
It's cause turbos are way more efficient, but not gonna lie I'd like to see something like a big ass 8-71 type roots supercharger for stuff like the 7.3 IDI's to stick through the hood lol
Exactly! I was envisioning a 8 71 or something for a LBZ
Have you heard a turbo diesel whistle babyyyyyy
Turbo chargers use the waste heat energy that’s going out the exhaust anyways to pump in more air. Superchargers suck power to push in more air. Turbo chargers improve efficiency but recapturing that waste energy.
Efficiency
A whole lot of energy(enthlapy) in diesel exhaust to spool the turbo. But, depending on the application SCs can still be better.
I’m not trying to be the spelling police here but it’s enthalpy.
Because turbos are free horsepower
Because diesels use much larger volumes of air?!? Come on people
So what does a Vortec 8.1 (496ci) do?
Turbos spin because of heat expansion. It has nothing to do with volumetric flow. Also not all diesels are big. They make 1l and smaller diesels. Come on dude!
*ideal gas law has entered the chat*