6v92TA Detroit Diesel Exhaust More RPM's

A few seconds of a Detroit Diesel 6v92TA 2-cycle exhaust revving to 2400 RPM's.

Category:

Autos & Vehicles

Tags:

• detroit
• diesel
• 6v92
• 2-cycle
• 2-stroke

[truckr74]

did you mean turbocharger? i thought a supercharger and blower were the samething [belt or gear driven] while a turbo is exhast driven

[linesplice]

You are correct. A supercharger and a "blower" are basically the same thing. The supercharger on a Detroit doesn't increase the density of air in a cylinder as it would in most other applications. The supercharger on a Detroit engine is used to push exhaust air out of the cylinder and push clean air in. The engine will not run without one. A turbo is exhaust-driven.

[671Detroit]

We just ran a jucied up 318 in a '71 brock and it hit about 5 miles to the gallon!

[linesplice]

This engine gets about 8-10mpg running around 70mph

[ilikecars1]

So this is a 2-Cycle, I've heard of them before, but I've never seen them run. Do you have to rev them up real high to get any power? Is this one of the ones with a supercharger and a turbocharger?

[linesplice]

The Detroit Diesel's rev about the same RPM's as any other diesel engine, but because there is a power stroke every stroke it "sounds" like they are revving faster. The Detroits do like more speed for power, but they lug too. All Detroit Diesel's have a supercharger, but this one has a turbo as well.

[lilbrudder32]

you're right... a diesel is VERY easy on gas... doesn't use any! :)

A 2 stroke will, on average, burn twice as much fuel at the same RPM for the same displacement... but it also puts twice as much power out ... roughly... :)

[lilbrudder32]

all detroit 2-strokes have a blower - not a supercharger. The difference being that a supercharger creates a boost pressure above ambient air pressure, and in the case of a detroit 2-stroke, the blower simply pushes the next air/fuel charge into the cylinder, thereby pushing the exhaust gases out the exhaust port at the same time. can't run a DD 2-stroke w/o blower. :)

[Peachezz131]

Also, the turbo is what adds "Boost" to this engine, the blower just "aspirates" it.

[Peachezz131]

This blower is the same as a suprecharger that you would see on a gas motor, just on this motor it does a different job. This engine needs it to push the exhaust gasses out of the cylinders, on a regular engine it puts more boost pressure into the cylinders. For example, a street rod with a 6-71 supercharger on it, it has a blower from a DD 6-71 that is now adding boost to the street rod engine, as opposed to simply "Aspirating" a Detroit. The same piece of equippment is doing a different job

[lilbrudder32]

@dakotamcatee like I said, yes and no... Which term is accurate depends on the application. A detroit 2-stroke with a roots blower is normally aspirated. A SBC350 without a roots blower is also normally aspirated. A Detroit with a turbo is turbocharged. A SBC350 with a roots blower is supercharged. A coke that's been sitting opens with a psht. A coke that's been shaken blows everywhere. Both are a coke, what differs is the volume of gas that's produced when shaken.

[dakotamcatee]

@lilbrudder32 So they're the same thing then?

[lilbrudder32]

@dakotamcatee if the blower blows the same volume of air at a given rpm as what the engine would draw in without it, then yes- turning it faster will cause it to blow more air, which with enough of it becomes a pressure increase. Likewise, if you put a larger blower (that pushes more air at a given rpm) on the engine, the larger volume of air than the demand has the same effect.

[dakotamcatee]

@lilbrudder32 So if you take a "blower" and make it turn faster and create boost it is then called a supercharger?

[lilbrudder32]

@dakotamcatee Anyone who calls a blower that produces boost a "blower" is using the wrong terminology, and anyone who calls a supercharger that doesn't produce boost a "supercharger" is also using the wrong terminology. Blowing no more air than the engine can produce on its own is not a power adder, but on the other hand a detroit 2-stroke will not run without one. Turbo detroits need a blower to get started, but once the turbo is spooling, they push enough air to keep running.

[lilbrudder32]

@dakotamcatee yes and no. The name differentiates the function they pose. A blower blows air. A supercharger "super charges" the air by producing boost. While on a 6v52, a blower is geared to provide enough air to scavenge and charge the piston with air, on a 4-stroke with the proper gearing, the blower becomes a supercharger, cramming more air into the engine than it could get on its own. Truth.

[dakotamcatee]

@lilbrudder32 Blowers and superchargers are the same thing.

[maersklandro]

Pure singing.