What is a two stroke diesel?
#31
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Ahhhhhhhhh...........Much better. Exactly what i was looking for Thanks alot guys!!
http://www.telusplanet.net/public/ryq/6V-53_on_dyno.mp3
http://www.telusplanet.net/public/ryq/6V-53_on_dyno.mp3
#32
It's my pot and I'll stir it if I want to. If you're not careful, I'll stir your's as well!
Many moons ago in another life while I was bumbing my way around the world I worked on a 10,000 ton Danish ship for a while. This ship had a single 7 cylinder two stroke blown diesel engine. Max RPM was something like 600 RPM. Each piston weighed one ton. Each cylinder had one exhaust valve and no intake valve. I could just barely carry one valve over my shoulder by myself. The engine was shut down and started on diesel but ran on heated bunker oil. Starting was by huge ammounts of compressed air. The exhaust valve spring for each cylinder was exposed and at cruise rpm I counted the valve opening and closing once a second.
The engine was direct coupled to the prop. Engine direction was changed by thowing one huge lever in the opposite direction which changed the timing of the fuel pump and I forget what else.
Each cylinder had it's own cylinder head. Can't remember how many nuts held each head down but there were about 8 nuts of about 5 inches across the flats. The wrench to remove/install each nut was about 3 feet long with a huge lump at the opposite end to the nut side. A 14 pound hammer was used to strike this lump to loosen or tighten each nut.
Once I had the job of measuring the cylinder bore using a mic with a looooong extension. But first I had to drop a ladder down the cylinder to climb down and stand on top of the piston. Cylinder bore was about 5 feet. Another time I had to remove a piston with just one helper who could not talk English. This is an easier job than taking a piston out one of our engines. Just remove one cylinder head, bolt a big plate on the top of the piston, disconnect the rod by climbing INSIDE the block, hook up the overhead gantry and haul away.
Sorry, but I do not remember the HP or other specs of this engine. I do remember that it was about three stories high. It was an interesting engine and job.
The engine was direct coupled to the prop. Engine direction was changed by thowing one huge lever in the opposite direction which changed the timing of the fuel pump and I forget what else.
Each cylinder had it's own cylinder head. Can't remember how many nuts held each head down but there were about 8 nuts of about 5 inches across the flats. The wrench to remove/install each nut was about 3 feet long with a huge lump at the opposite end to the nut side. A 14 pound hammer was used to strike this lump to loosen or tighten each nut.
Once I had the job of measuring the cylinder bore using a mic with a looooong extension. But first I had to drop a ladder down the cylinder to climb down and stand on top of the piston. Cylinder bore was about 5 feet. Another time I had to remove a piston with just one helper who could not talk English. This is an easier job than taking a piston out one of our engines. Just remove one cylinder head, bolt a big plate on the top of the piston, disconnect the rod by climbing INSIDE the block, hook up the overhead gantry and haul away.
Sorry, but I do not remember the HP or other specs of this engine. I do remember that it was about three stories high. It was an interesting engine and job.
#33
Here are some sound clips on a 12v92 DD! http://www.bandagbullet.com/dvd.htm
#34
Here are some more!!! http://www.bandagbullet.com/bandagbullet.bak2/
#35
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Originally Posted by SjLingenfelter
Cylinder diameter - 9-1/16 inches
Piston stroke - 10 inches
DISPLACEMENT PER CYLINDER - 654 CUBIC INCHES
Number of cylinders - 16 or 20
Compression ratio - 14.5:1
Exhaust valves per cylinder - 4
Engine weight -
16 cylinders: 34,526 pounds / 15,661 kg
20 cylinders: 40,144 pounds / 18,209 kg (The oil pan alone weighs over a ton!)
Idle speed - 315 rotations per minute (rpm)
Full speed - 900 rpm
That right there boys and girls is a biggin
Piston stroke - 10 inches
DISPLACEMENT PER CYLINDER - 654 CUBIC INCHES
Number of cylinders - 16 or 20
Compression ratio - 14.5:1
Exhaust valves per cylinder - 4
Engine weight -
16 cylinders: 34,526 pounds / 15,661 kg
20 cylinders: 40,144 pounds / 18,209 kg (The oil pan alone weighs over a ton!)
Idle speed - 315 rotations per minute (rpm)
Full speed - 900 rpm
That right there boys and girls is a biggin
#36
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Originally Posted by nickleinonen
emd 2 cycles i work on daily [645v 12-20 cylinders, 710v 16 cylinders, and i think we have 1 or 2 567v12 kicking around]...
#37
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about 15 years ago there was a guy running around here in the central KA with a Chevy 2500 4X4 , he had put a 6V-53 in the truck and fab up twin turbo's to it , it also had 5 and 4 browning set-up , back then he pulled a large trailer and had no problems going up Donner in that thing. sounded even sweeter , now for sounds , there is nothing like a Cummins ISX Signature 600 with twin 8 in stacks pulling 575 h.p. to the wheels in the dyno room. now that is sweet
#38
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Two-stroke diesels are pretty common in sport fishing boats.
As a matter of clarification for some, two-stroke does not mean two-cycle. Nor does four-stroke mean four-cycle. Actually, a two-stroke engine is one- cycle and a four-stroke is really two-cycles. We just got in the habit of saying cycle instead of stroke which is not the same. Now that I've insulted you old pros........
As a matter of clarification for some, two-stroke does not mean two-cycle. Nor does four-stroke mean four-cycle. Actually, a two-stroke engine is one- cycle and a four-stroke is really two-cycles. We just got in the habit of saying cycle instead of stroke which is not the same. Now that I've insulted you old pros........
#39
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My father once built a custom truck...old Diamond T log truck cab on a Chevy 3/4 or 1 ton chassis. He had a small Detroit in it for a while with dual stacks. That thing SCREAMED!!! Not power wise, although it did pull very well also, but the sound was awesome. I was just a little kid, but I could hear him downshifting where the speed limit dropped a half mile from our house.
Jim
Jim
#40
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Originally Posted by rebal
Dont forget that detroits will run backwards too. ask me how i know
Mack Maxidynes run backwards too!
Looks funny with exhaust smoke coming out the air filter canister by the hood!
#41
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Had two 225 horse 6-71 surplus diesels in a 56 footer. WOT 2300 RPM sounded like it was flying. 12 knots. Johnson and Towers has taken that same design to 475 horsepower and Viiking used them in there yachts in the late eighties. Hatteris Yachts used DD,s forever. 6-71's, 6v-53's etc. All two stroke weed eater engines. But say what you will. they are like the old Harley engines. If they got oil and gas they run. They leak and they externally lube. The US Gov. had a million of them.
#42
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Many moons ago I drove a White Road Boss II with a 238 hp 6-71 Detroit and a 10 spd. Roadranger. That truck made some sweet music stroking up and down thru the gears on the hilly New England secondary roads. She was able to keep right up loaded with the rest of the fleet, which were Mack U model 5 spd. 235 hp Maxidynes.
Must have been all the gears...
A few years later I was driving a Marmon cabover with a 318 hp 8-71 Detroit and a 13 spd Roadranger, hauling fresh swinging beef from midwest packing houses back to the NY/New England area. The company I was leased to (Distributors Service Co) was transitioning from 12'6" trailers to 13'6" trailers (and pre-cut boxed meat), and that 318 had a very tough time running loaded in 13th OD with the taller trailers.
That was back when the Cummins NTC-350 was top dog for over the road power.
The bumblebee like sound of a Detroit Diesel working thru the gears off in the distance is music lost to today's generations...
Must have been all the gears...
A few years later I was driving a Marmon cabover with a 318 hp 8-71 Detroit and a 13 spd Roadranger, hauling fresh swinging beef from midwest packing houses back to the NY/New England area. The company I was leased to (Distributors Service Co) was transitioning from 12'6" trailers to 13'6" trailers (and pre-cut boxed meat), and that 318 had a very tough time running loaded in 13th OD with the taller trailers.
That was back when the Cummins NTC-350 was top dog for over the road power.
The bumblebee like sound of a Detroit Diesel working thru the gears off in the distance is music lost to today's generations...
#44
DTR's Locomotive Superhero and the DTR Sweet Tea Specialist
Originally Posted by rebal
Dont forget that detroits will run backwards too. ask me how i know
matt
#45
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Originally Posted by Blue3quarter
Yes they will! And you can also hook detroits in series and make them bigger. Like taking two 6v71's and getting a 12v71, i've seen that done once.
matt
matt