I wan't 2 detroit 8V53

[StianM]

I more or less decided to get my hands on two 8V53 detroits.
I'm wondering what I could do to them.

I'm not going for this to save moeny, but to simply push this old beast to it's limits regarding weight to power and fuel efficensy.

I was thinking to remove the blower and install a electric blower that would savange the cylinders when the turbos is not producing boost yet.

I want to trow in intercoolers and VNT turbos to keep the boost at as mutch of the power band as posible.

I was thinking to figure out what boost the old blower produce and then have a preshure switch activating the electric blower if engine is running and the boost dropp below this setpoint.

I also think to get a smal 12V or 24V compressor that I could use to spinn up the turbos to help on spool time on low load when I try to accelerate.
(jet assist system)

I will write a simple program in Logo that would activate the jet assist system and electric blower.

What would be really great is if there was any place I could get my hands on a electronic injection system. Trow this old injectors out and get machined some adapers making it able to fitt new type high preshure electronic injectors.

I was watching a marine scania diesel and I was impresed by the response and how nice it was ideling. A V8 with only run 4 cylinders below 50kW and it was sweet.

Is there anyone that sell this stuff for aftermarket?

Regards
Stian

A roots kompressor would be the simplest (and proven) choice to blow them up from idle `til the turbos work.

And why going complicated (electronic), when most of us still prefer the simple, reliable injection?

Regards
Richard

[StianM]

Originally Posted by apex1

A roots kompressor would be the simplest (and proven) choice to blow them up from idle `til the turbos work.

I have thought about cutting it making it shorter and use a electric motor on it, but I don't want it to steal powe from the crank anymore once the turbos are able to do the job.

Originally Posted by apex1

And why going complicated (electronic), when most of us still prefer the simple, reliable injection?

Regards
Richard

I'm a service engineer for power and automation for a large supplier of ship automation systems. Dos that answer your question?

Electro coupling of the compressor!?

And YES to the second point.

[StianM]

Originally Posted by apex1

Electro coupling of the compressor!?

And YES to the second point.

I know there is made a few electric clutches likt this and volvo used something like this on there KAD series at some point.

I was thinking more like hawing a seperate electric motor that is simply on and off.
I was thinking about inverters with speed controll, but they are not too cheap.

A few prehure switches would and a PLC would make shure the engine allways have enough air.
If changes in load below 50% is to big and fast air would be injected to spinn up the turbo.
If low charge air preshure the same would hapend and if it still drops the compresor would be started.

So far I found one engine, but I would like to get a pair that I know come with the same base HP.

[FAST FRED]

You will be far further ahead with a motor designed later than the mid 1930's.

The Detroit's AT BEST will make 16 hp from a gallon of diesel, today modern 4 strokes get 22 and some 24.

All the 2 stroke DD are very inefficient under 60% of rated load.

That's why the made 1,2,3,4,6,8,12 and 16 versions and why there are so many choices of cylinder size.

FF

And lookup "dieselenginetrader.com"

Regards
Richard

[WestVanHan]

Interesting concept.

If you are running on a dyno this may work,but in a boat I think not due to off throttle lack of boost.

How about:
-a small turbo (from a car) used only for scavenging?
-maybe run it off of one or tow cylinders? SAAB did well with asymmetric turbocharging.

Make it small enough to run boost at low rpm-with the wastegate opening as it reaches a set pressure or gets a signal from the manifold that the main turbos are taking over.
And with a flap to prevent overspeeding,if they will,and to stop flow from the big turbos stalling out the small compressor.

Then maybe you'd need a compressor only for starting.

An old DD mechanic told me that technically a DD could idle without the bottom rod caps as there is always some downward pressure on the piston.


If you want instant fun power,add nitrous oxide.

[powerabout]

Therw was a guy in OZ racing in Class one offshore internationally that modified a detroit back when diesels were legal, he did as you describe.
It had a computer controlled shutdown and bypass of the blower and then ran on the turbos, it made huge horepower like 1000hp out of a 871 or whatever the class allowed.

"1,2,3,4,6,8,12 and 16 versions" - Those are multiples of a basic design, right? Why leave off the 24? I doubt that there have been 32 or 48s (the 24-71 was bad enough and the niche (low height in a yacht) was better filled by MAN.

[powerabout]

I think the bigger engines were filled by 149's and then EMD's
Do you have a photo of a one cylinder, never seen one of those

http://www.youtube.com/watch?v=MTPkeXvJ_HQ
Ski (Eric) at boatdiesel.com, I believe has one.