rpm, Bore x stroke
Some 2-cycle Detroits like mine are irritating to live with and leak oil like crazy. Detroit Diesel The two cycle diesel has been the mainstay of Detroit Diesel for nearly 60 years now. Horsepower (BHP) with N55 injectors: 80 at 800 RPM, 124 at 1200 RPM, 164 at 1600 RPM, 191 at 2000 RPM. longer than most 4 stroke engines, creating more rotational mass
You have no items in your shopping cart. Marine Diesel Engines. Beef is one of the key ingredients to higher power and reliability. JavaScript is disabled. Click. The modern diesel is very sophisticated, complex,
DETROIT 671 TIB`S 485 HP FUEL BURN-need help I`m looking at at 45 viking 1989 and according to the owner he burns 20 gallons per hour at cruise both engines. Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". Weight is 32,000 lbs. What is the fuel consumption of a Detroit Diesel 671 TI engine? Original: Nov 4, 2010. The Detroit Diesel Engine In 1938 an engine was introduced that would help bring an end to WW2, and would develop into one of the most versatile engines ever made. exhaust gases), why do they put turbochargers on it? [2], Fuel is provided by unit injectors, one per cylinder, each injector being cycled by the camshaft that also cycles the exhaust valves. boat where the power range is applicable. At 1,200 RPM, the engine features an oil pressure of 40-55 PSI, airbox pressure of 1.1 inches mercury, and a fuel pressure at cylinder head of 40-60 PSI. Good luck with your search . Fuel Consumption with above conditions: 7 gal/hour at 1200 RPM, 9.5 gal/hour at 1800 RPM. I personally l Iike the exhaust note - sounds something like a turbine. by compressing it until it explodes under extreme pressure, about
What about the others? What are the 4 major sources of law in Zimbabwe? Particularly the conversion
overhauls is not uncommon. that ultralight boats make for unpleasant experiences on rough water. I'm just about to buy the 40 litres for the end of season oil change, but the cost of 40 grade mono is four times higher than multi grade. 8 knots! With that kind of power, there is no such thing as a
Problem is, you do,
Does an Overhaul Entail?" too much power out of these blocks. JavaScript seems to be disabled in your browser. even then they had to lower the compression and ended up with a
in tip top shape is of extreme importance to your engines
I was only a red faced deckhand back then, but every day, 24/7 during the summer and I don't recall being down a single time due to a major mechanical. is not cooled down before the next compression cycle, the temperature
Weight is 32,000 lbs. I've been around these engines since the late 1950s. throwaway block. The turbo chops up the racket some, but we had to put the mufflers back on when our customers started calling in with complaints. The former is represented by Detroit Diesel alone, while
a degree in higher education, particularly engineering and naval
comes up and starts compressing the atomized fuel, it is going to
stabilizers and bow thrusters. smokier engine. Yes, they are straight sixes with the turbo that gets 485hp out of them. The Cat 3208 remains a good choice for medium size
Unlike a conventional gasoline-fueled two-stroke, which gets its lube oil mixed with the fuel, a two-stroke diesel has a sealed crankcase to contain the lubrication oil. Who is Katy mixon body double eastbound and down season 1 finale? For overall longevity, I'd opt for the 6-71 in any
But they did sound like they had 500 HP, with straight thru exhaust. No muss, no fuss. If this is your first visit, be sure to
Yes, it is,
Compare the specs of this Cummins engine with
I just tripped over a less than one
Yet nearly every one of this line has experienced
for pushing one of those 40k Taiwan trawler types at 21 knots. top RPM range: the longer the stroke, the slower the engine has
The bottom line is that the Detroit Diesel gets
Kauna unahang parabula na inilimbag sa bhutan? Notice that it's displacement is is 636 cu.
33.0. The Cat 3208, for example, has a fairly short
-- all parameters being equal. Detroit Diesel 1.1 % 2.3 % 7.6 % 28.2 % 60.7 % a given engine block, the less service life it will give. Couple of tricks with the high horsepower.different air ratio turbo, big fat injectors, advance timing (one notch on tooth and sometimes offset woodruff key). The Detroit 71 series is comprised of: The IL 71 (inline) with the best in class 271, 371, 471, and the 671 models The V71 engines include the 6V71, 8V71, 12V71 and also the 16V71 The engines are also well known for the 53 series according to the size of the engine to consider. intake valves next to the exhaust valves; the DD engine has only
The very first of its kind, this book provides the essentials that every novice needs to know, as well as a wealth of esoteric details. like that, so you end up with lower power. What was the BONUS ROUND answer last night? is delivered to the propeller. more to it than that. Not sure if gearing specs will be mentioned although I do recall a very thorough section of the manual devoted to blower service. you'd be blown away at the difference in overall size. Gray picked up the contract to convert the engine over for marine purposes. Engines specifications sheets for Detroit Diesel engines. There's nothing like knowing the reason why you should spend more
% Load| 1x| 2x| g/hk hr| l/hk hr| l / hr| RPM|. myths about diesels. The ones we had had advanced cam timing, but I don't know about blower ratios.
Strong team spirit, including ability to organize work according to needs and requirements of multiple team members and stakeholders? offered at 850 hp @2300 but is now up to 1110 hp. If you
As mentioned, these are
With a four cycle, you have to go
Because it was never designed to dissipate those kind of heat
Well, another year has gone
This
that if you want reliability and economy, keep it heavy, and keep
The operating system of the two cycle is radically
outboard motor works. analysis. The smaller
The boat has twin Detroit Diesel 6-71N's (283 hp each) and will cruise happily in the 8.2 - 8.3 knt range at 1500 rpm. This engine utilizes
downward, past this row of holes. Fortunately, ideas about light weight, hot rod
injuries will put these babies out of the game fast. Published by: D. H. Pascoe & Co., Inc. Woe to the captain who gets air into
of "Big Daddy" Don Garlits, and how they took an ordinary
MarineEngine.com does not offer troubleshooting assistance or repair advice by email or by telephone. Even though the turbo creates extra drag itself, it also allows
to worry about the state of fuel return to the tank when, for example,
ago, a reputation that, for the most part, no longer holds. While the injection pump
If you're not willing to pay the cost of an expert engineer,
What year would you graduate high school if you were born on December 26,1990? In a boat, the coolant which circulates through the engine is cooled via a heat exchanger, supplied with cool water from outside of the boat, which is mounted on or nearby in a "double loop" configuration. (What setup?). Why do people say that forever is not altogether real in love and relationship. Never heard an hp rating that low. I have a pair of 671 marine diesels 485HP. It's a matter of timing. Why? The 6-71 is a two-stroke engine. Most of all 71 and 92 series (can) use interchangeable
Keep a lot of extra oil around. Hence the hesitation. Likely a TIB.turbo, intercooled,bypass. [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. small engine with 6 or 8 cylinders and pistons that pump and supply
Copyright 2023 Yachting. Got Recent Overhauls!" and so now we are going to subvert the benefits of simplicity to
The battle-rated version made for the U.S. Navy developed 225 horsepower. The number 71 refers to the nominal displacement per cylinder in cubic inches, a rounding off of 70.93 cu in (1.2 L). In 1957 V-block versions were introduced and . $4,250.00. Well, it's not there. These engines were pretty durable but would get a bad wrap sometimes when the owners didn't keep the airsep filter draining valve clean and the valves would get hot and drop a pie slice shaped piece into the cylinder. Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". auxiliary drive housings on the Detroit. you loose engine performance. four cycle. Thanks in advance 02-25-2020, 05:06 PM #2: Sailor of Fortune. While the turbo piston was lower compression some did experiment with natural aspirated pistons in turbo engines. On a DD engine, each injector is operated by the dual
The Series 71 engine was the first product of GM's Detroit Diesel Division. If it were a turbocharged "TA" engine from the factory, it'd make 760 hp . Diesels and particularly 2-strokes, respond very well to boost. Lightness
Whatever one might have to complain about
Thus, higher power at lower speeds. the best way to go, both from a cost and reliability stand point. greater than the 6V92 at 522 cid. Diesel Parts Direct sells new and remanufactured Detroit Diesel parts. The DD has no fuel injector pump, but rather each injector
Unlike the turbocharger of a four-stroke engine, the primary purpose of the 6-71T's turbo is to reduce the blower's parasitic loading at higher engine power levels, which improves fuel economy. diesels are dying a natural death. this suction and forces air into the cylinder at a much faster rate,
Insurance and Issues of Law. RUN AWAY! double the number of internal parts as say a Caterpillar V-8, making
6V71 Detroit Diesel Specs and General Info, 6V71 Detroit Diesel Engine Torque and Horsepower, Marine Engine Torque, Horsepower and Fuel Consumption, See 6V71 Natural (Non-Turbo) Engine Parts for Sale. In theory, this makes the engine
Yachting may receive financial compensation for products purchased through this site. are very complex and expensive to replace if one gets damaged, such
system is more reliable and requires less frequent service, the
[1] At 2,100 revolutions per minute the engine is capable of producing 230 horse power (172 kilowatts). These engines definitely
In performance, the 6-71 will compare favorably to the DT466 in everything except for fuel economy. for more potential trouble, but also increase efficiency considerably. Well, you asked about economical cruise speed, and that's always the displacement speed, regardless of the cruise speed the vessel can handle. than a spray nozzle like on the end of a garden hose, albeit a bit
All were 2 stroke supercharged diesels. I may have a lead on just what you may be looking for.Older top of the line boat 2 new awesome engs. Jan 12, 2020. Many products featured on this site were editorially chosen. They
Can anyone give me a ballpark figure how much fuel a Detroit 6V53 will consume, loaded? fare in something other than hotrods. Very old technology (developed by Alex Winton in the 1920's, the 6-71 was first made in 1938), but very reliable and well proven. 1 or twice a month From Kent Island to Cape Charles in only 5 hours? Man I wanted that boat.I was on it like a pot a neckbones. Yet fuel costs are insignificant when it comes to general maintenance costs and repair costs. it on. around with the German diesels. Had blow by that was so bad crankcase pressure would push the dipstick out of its home position about 1/4" or so. size and change the power rating, particularly downward if you want
an engine has design problems, it takes about 15 years before we
choices are those with the best track records. typically another 400-600 lbs depending on engine size. Hundreds of thousands of the 71 series engines continue to labor on in stationary applications, earth-moving equipment, buses, trucks, ships and boats. care, though not necessarily at significantly higher cost. One for Alf I guess. above are not the only factors. Diesel. The pros call it "brake-specific fuel consumption." This makes it important to know that gasoline weighs about 6.1 pounds per gallon and diesel fuel 7.2 pounds per gallon. Might aswell get a sailing boat and burn 3l/hr at that speed. enough that weve had time to get a handle on general service
Spent gases exit via conventional poppet valves in the cylinder head actuated by pushrods when the piston nearly reaches the bottom of its stroke. in his family who began his surveying career at age
GM diesels of the '30s also had major interchangable pieces with 71 cubic inch cylinders such as the 3-71, 4-71, 6-71, and 8-71. That old 6-71
You can easily access our parts selection by using the product links below. With a 4 cycle engine, when the fuel injection pump goes,
pressure exceeds the blower pressure. This is a spectacular little power plant for those that like to
Sep 20, 2017. The exhaust valves close, and the piston ascends for another compression stroke. The one critical feature
negates the virtues of those engines from a by-gone era. also heats up the air on the intake side, which is why you have
In those apps, they did not last long, cylinder kits would require replacement at around 2000hrs. There are lots of places you can cut corners,
bottoms and running at lower speeds, say around 20-22 kts. parts. It was used in landing craft during World War II and is used today in private boats and training facilities. 6.8-7.5 gallons per hour at 10-12 mph and. [1] The 71 refers to the displacement in cubic inches of each cylinder. marinized by Covington and are rated at 450HP. that they are delicate is not an overstatement. fair share of design faults also. Load Matching The criteria discussed
Typical 6-71 Fan-to-Flywheel Model an-to- ywheel| models . The incredibly reliable old 6-71 engine is in service world wide and powers everything from busses to generators to tug boats. This is done by pumping in more fuel and turning
back to the tank, and it is very hot. The other popular maranized 6-71, Home, down in the valley behind the Red Angus, If this is your first visit, be sure to
Why can't they get 600 hp out of it? Thus, when the piston
Fuel Consumption with above conditions: 2.75 gal/ hour at 1200 RP, 3.9 gal/ hour at 1400 RPM, 5 gal/ hour at 1600 RPM, 7 gal/ hour at 1800 RPM, 10 gal/ hour at 1800 RPM. inside the cylinder is going to be rather hot. there is a ready made pump to do whatever job you need from your
in. We had a 6-71 Naturally Aspirated (NA) engine that ran like a champ in a 42 Uniflite and was still running strong at 4000 hours, never had a hiccup with that engine, my all time favorite Detroit Diesel. Might aswell get a sailing boat and burn 3l/hr at that speed. Except for sailboat auxiliaries, you wont
You're
powers everything from busses to generators to tug boats. you decide to run off of one tank only. The 6-71 Detroit Diesel is undoubtedly the most widespread diesel engine ever. Stock# 12.7L-06R0131749. Repowering We get a lot of questions
Give it a bit more power than you think it needs. Later there were also a 51 (later 53) and 110 versions. they will fall down is in a larger boat with a deeper vee, simply
Even so, there is a major
671 Truck; 671T Generator Engine; V71 Series. again. more refined. Search. Cracks,Finishes and Surface Defects, Marine
costs. they do not like to run hot, that is the major reason these engines need to be rebuilt. Experience has shown that, like most manufacturers,
In big (100,000+ HP) marine 2 stroke diesels, they use electrically driven centrifugal blowers to scavenge during starting, and the turbochargers take over once the boost comes up with exhaust temperature. 0.39 to 0.41 gallons/horsepower/hour depending on horsepower demanded. [1] The engine weighs 2,185lb (991kg) and is 54inches long, 29inches wide and 41inches tall. There are a huge number of variables that come into play,
6V71 Detroit Diesel Specs, 6V71 Detroit Diesel Engine 24 hr Worldwide Shipping 1-888-433-4735 (U.S.) 305-545-5588 (int.) The 8V92 would fall into the same category, except
Fuel Burn, Engine Life, Service, Part Availability, Ect, Ect. engine castings (by yesteryear's standards). But theres
to have an intercooler to reduce this air temperature. because the available choices are so few. going to pay for what you need one way or the other, be it on the
making a bit of a fuss when engines crap out early. Higher pressure at the inlet of a positive displacement blower will provide higher pressure (flow) to the outlet. Detroit 6V71 Parts and Information Designed and developed by General Motors in 1938, the engine achieved almost mythic status because its two-stroke combustion cycle (one power stroke for each crankcase rpm) gave it significantly greater power . Or at least
Ergo, when youre intercooler gets dirty,
When this happens, all bets are off. The turbo engine (6V71 T) will have a model number that starts with a 706 and will contain a 3 in the sixth digit, such as 7067-7301. JAKES - DDEC II - 450 HP - GU60. What is are the functions of diverse organisms? In the 1980's they added turbos and charge air cooling to get hp up to 450 and 485 for sport fish and other planing hull boats. Permalink. Mama dont
This page was generated at 10:24 AM. going to explain in detail why this is a difficult question to answer,
market, which they serve well. and no blower. often encountered with 4 cycle engines. After the compression stroke, the piston travels
increases that more power puts out. out the Internet forums and you will see these questions asked over
Assembling The Detroit Diesel 671 Long Block; Finding Your Detroit Diesel Engine Serial Number; Detroit Diesel 6V71, 8V71, 12V71, 16V71 Engine Tune Up . to work on DD than any other. you now have a bigger, heavier engine running at a higher speed
2. This is why you never need part numbers to place an order with us. The Cat big block engines have
This one thing that makes DD blocks more complex. In terms of power
to hang around too long. For a better experience, please enable JavaScript in your browser before proceeding. thing. Listed below is the torque and horsepower information for the 6V71 Detroit Diesel Engine. They run at 185 degrees. But you get quite a bit more power
And one more thing. You can work it just so hard
about how to go about repowering a boat. or forces out the burned gasses up through the four exhaust valves. has been excellent over the years. One has 5500 hrs but 2100 since overhaul. out equivalency, the 3208 and 6-71 are similar, though the edge
It is a long stroke, smaller bore engine than
was drawing to a close. I had 8-71n's and as Ski said, with reasonable care and light duty, they will keep running a very long time. of gas to diesel. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. That very light
so it results in a temperature increase, even with intercoolers. horsepowers. The fuel is ignited
This is not possible with four
considerably higher torque at lower speed ranges, but limits its
Your proposed 6-knot speed is right at the 75-percent mark (8 x .75 = 6). simple rule today that the more power you try to squeeze out of
No where near 300HP, let alone 400 plus. Such is life in the fast
Fuel Consumption with above conditions: 3.5 gal/ hour at 1200 RPM, 5 gal/ hour at 1400 RPM, 7 gal/ hour at 1600 RPM, 9.5 gal/ hour at 1800 RPM. similar. its lights out. Brake horsepower is used to measure horsepower. The Detroit Diesel 4-71 engine shows a fuel consumption between 0.430 to 0.385 lb per hp/hour You will also note that this engine falls within the specs already laid out for most diesel engines and is well suited to have the above table applied to it. Marine Engine SHP, Power Propeller Load, N55 injectors: 30 at 1000 RPM, 51 at 1200 RPM, 83 at 1400 RPM, 121 at 1600 RPM. The grand total for the war years was about 100,000 engines. 2300 rpm 2300
from Buying a Boat, Stress
It's bigger brother, the EMD (Electro Motive Division), had already proven that diesel powered trains, were far superior to steam engines. 6V71 Detroit Diesel Engine Torque and Horsepower
The Integrated Detroit Powertrain combines our most fuel efficient engines ever, the GHG17 DD13 and DD15 , with the technologically advanced DT12 transmission and Detroit tandem high speed ratio tandem axles to help you get the most out of every gallon of fuel.. With engine technology calibrated to deliver greater . you can understand the why's and wherefores of making good choices. With Detroits, you have
[2] As a two-stroke engine is incapable of self-aspiration, a mechanically-driven blower charges the cylinders with air and assists in clearing ("scavenging") exhaust gases following the power stroke. have done fairly well when properly matched to load. The 6-71 makes a unique sound because its a two-stroke diesel. Articles, Images: Copyright
Caterpillar DD engines tend to be large
Heat exchangers are required on marine engines to dissipate engine heat into the seawater. The other little Cats? I'm no mechanic but everything I've read about them , they seem to be a good fit for a trawler at low speed. For your larger boats, and very heavy smaller boats
Very old technology (developed by Alex Winton in the 1920's, the 6-71 was first made in 1938), but very reliable and well proven. most did not, so this is good news for buyers wanting to do
I saw the boat a couple weeks ago and it's going down hill quick . I recently purchased a 40ft ex seiner with a 200hp rated 6-71 Detroit diesel the boat weighs 18tons beam of 12'7" and draft of 6'6" what sort of fuel consumption can I expect? I rebuilt a couple back in the day, every part that wiggled was worn completely out. And it also greatly reduces the internal
that can make engine selection something that requires very careful
Altogether, the engine delivers
MTU Detroit Diesel, a Tognum Group subsidiary, opened a new Gulf Coast Sales and Operations center in St. Rose, Louisiana, dedicated to the growth of engine sales in the commercial marine industry. I crusie at 23-24 knots with the capability of 28-30 wide open throttle. Old Post I know. JavaScript is disabled. torque per cylinder. Of late we have been running into
by roller followers placed in the head with a very short "pushrod." 5,000 pre purchase surveys in addition to having conducted
I also remember the sound of the engine at idle, as I boarded the Greyhound coach the loping hunt, beating like a subwoofer to the treble clatter of combustion and the valve train. Thats why everyone liked the mushroom head valve cover release bolts, so you could pulls the rack pins during a runaway. DD fuel system. hundreds of boating accident investigations, including
and excellent fuel economy. Thus: at continuous full power (116 kW @ 2100 rpm) it will use approx 25.0 liters per hour. We have been in business for over 28 years, and have served many satisfied customers since then, and have developed a reputation in the industry for delivering Detroit Diesel parts that are of premium quality and built to last. The numerals 6 and 71 stand for the number of cylinders in line (6V designates a V-6, which appeared in 1957) and the displacement of one cylinder in cubic inches (actually 70.93 cubic inches). displacement 6-V92 is ONE THIRD physically larger than the Cat. As with Mercedes (to
is attached to the same shaft, and pulls fresh air in and forces
I still think the Detroits are
The blower and turbocharger aspiration system constitutes
Please register or log in to actively participate. Menu. Available for inspection and/or survey to qualified buyer ". Nor are these German engines quite as reliable
MD. of extra parts. Who were the models in Van Halen's finish what you started video? is going to occur a few nanoseconds before the piston reaches top
[5], The 6-71 was used for Higgins LCVP, a landing craft used in larger numbers during World War II. The information is based on an air temperature of 85 degrees F and an elevation of 500 feet. Quoted the fuel consumption of his Roamer 56 as. The four cycle engine
Are you expecting 30kts? Theres just no getting away from the fact
as well as being under pressure. You know, those big things sticking
more than 100 cu. The inline models were offered in a one, two, three, four and six cylinder variants. Engines like M.A.N., MTU,
We all thought that Yanmar was going to lead the way with their
Thats all the longer the engine would last! From what I can tell, these use the 9225 injectors. because of the inefficiency of the hull. Ross > Date: Tue, 6 May 2008 08:46:02 -0700 The 485 HP versions are not long lived if run as they were intended. It is a great engine, good luck in your search. stroke, as do the Cummins V-8s. Introduced in 1938, production ran until 1995. The Detroit Diesel Series 8v71 is a two-stroke diesel engine, which offers a displacement of 9.3 litres, 567.5 cubic inches. I change the oil every 100 hours and fuel filters. pairs of exhaust valves and one to run the injector. cycle engines, and is one of the things that has endeared DD to
Expect $5k+/year to keep them running. Reliability is without
Naturals (non-turboed) 6-71's are J&T 310hp. before it begins to break down. I grew up working on fishing boats in the 70's, and many of these engines were used on the boats I was on if I remember correctly. On November 23rd, 2018, David Pascoe has passed away at age 71. David Pascoe is a second generation marine surveyor
Detroit Diesel stocks parts for the 71 series, so dealers and independent repair shops are still able to rebuild them. - Diagram of typical Detroit diesel fuel system. A hard and realistic look at the marine market place and delves into issues of boat quality and durability that most other marine writers are unwilling to touch.