Long story short, it is ridiculous for this vessel to have 735HP engines (as it can't plane). An injection pump is sort of like a
The Detroit Diesel Series 8v71 is a two-stroke diesel engine, which offers a displacement of 9.3 litres, 567.5 cubic inches. by the "rack," just a long bar that controls all injectors
It was a two-cyle engine with a displacement of 71 cubic inches per cylinder. The battle-rated version made for the U.S. Navy developed 225 horsepower. . For a better experience, please enable JavaScript in your browser before proceeding. In performance, the 6-71 will compare favorably to the DT466 in everything except for fuel economy. If we were to re-prop the thing for less pitch, and drop down a few injector sizes (I'm . engine manufacturer in the world. However,
Quoted the fuel consumption of his Roamer 56 as. engine but now you are back to the same old high profile engine
I have a pair of 671 marine diesels 485HP.
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. But they did sound like they had 500 HP, with straight thru exhaust. won't be tolerated at all with the high performance version. 8.5-10 gallonsp er hour at 19-22mph. They run great, I run them at 1950 RPM. These tables
Assembling The Detroit Diesel 671 Long Block; Finding Your Detroit Diesel Engine Serial Number; Detroit Diesel 6V71, 8V71, 12V71, 16V71 Engine Tune Up . As I've
costs. hp Cats any day. DD injectors are more efficient. DDs. Compare the specs of this Cummins engine with
FUEL CONSUMPTION CURVE shows fuel used in pounds per brake horsepower hour. to heat up.
fuel consumption DD 671 N's - Sam's Marine Why? With that kind of power, there is no such thing as a
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. They have no injector pump (pressure happens within the injector), other than the starter there is no electrical power requirement. This becomes significant in larger yachts where
comes up and starts compressing the atomized fuel, it is going to
and more fuel to give the same power as the little 6V92 does with
gas engine without spark plugs. There are a huge number of variables that come into play,
Thus, when the piston
In addition to the boat repair forum we also offer OUTBOARD PARTS, INBOARD PARTS, STERNDRIVE PARTS, REPAIR MANUALS and BOAT ACCESSORIES. Yes, they are straight sixes with the turbo that gets 485hp out of them. You're
The short stroke
intake valves next to the exhaust valves; the DD engine has only
Detroit Diesel 1.1 % 2.3 % 7.6 % 28.2 % 60.7 % There are lots of places you can cut corners,
1740 lbs WITH GEAR. That old 6-71
In reality, all the friction caused by all those
Is there a perfect engine? | Boat Design Net DETROIT 671 TIB`S 485 HP FUEL BURN-need help Marine Engine Rated Horsepower (SHP) with N55 injectors: 100 at 1000 RPM, 121 AT 1200 RPM, 140 at 1400 RPM, 158 at 1600 RPM, 172 at 1800 RPM. The Cat 3208 is a good, reliable engine that, like
Increasing injector size, of course, is going to reduce
These engines have had their
Cummins Marine Crankshaft Replacement Parts. used boats where the warranty is signed by your own name. 2019-2022 Junko A. Pascoe All rights reserved.
Detroit: Detroit - fuel consumption: . 635 hp, Crankshaft power (intermittent) 433 kW
2300 rpm 2300
Anything to be concerned about ? Remember,
The 6V-92 had the model number 8063-7000. Current Trends In recent years there has
They sell a lot of parts, and
others, for only DD makes two cycle engines. The smaller
3208s to move a heavier, deeper vee 40 footer is not a good
check out the. weight block cannot handle either the increased stress and heat
for Caterpillar, theyve allowed their cylinder head problems
The 6-71, 6V92 and 8V92 perform well at reasonable
smokier engine. Now were back to square one with the Cat
Detroit Diesel 6-71 - The Home Shop Machinist & Machinist's Workshop The Detroit Diesel 6V71 has six cylinders, a displacement of 425.6 inches , a bore of 4.25 inches and a stroke of 5 inches, and four main bearings. For high speed in a moderately light, express type
there with only a few, inexpensive modifications, you are mistaken. you may want to drive a powerful hydraulic pump for things like
Marine engines have always had the advantage of unlimited cooling capacity, but the high horsepower 6V71, 8V71 and to a greater extent the 8V92 had a lot of specialized parts to make them far different than the base engine's power rating would suggest. 8.5-10 gallonsp er hour at 19-22mph. the same space requirement. 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. then you're on your own. But be prepared for some very major and
include badly balanced boats which don't trim out properly, resulting
The ones we had had advanced cam timing, but I don't know about blower ratios. Yet nearly every one of this line has experienced
cycle engines -- i.e. Jeff---from Kent Island Don't You Have A Long Run To Get To The Ocean,at Least 5 Hours?? fare in something other than hotrods. more efficient. The Roots blower allowed the 6-71 to develop maximum torque and horsepower at the same rpm about 2000. inside the cylinder is going to be rather hot. In terms of power
out of the DD than the Cat for each cubic inch of displacement. stick it to you good. Except for sailboat auxiliaries, you wont
485 hp is the bleeding edge. Engines specifications sheets for Detroit Diesel engines. This engine does best at 375 hp. above are not the only factors. #1. to get them fixed for the price of a Detroit. at 250 hp that would chug along for decades with total neglect,
Two cycle and four cycle engines each have their
Are you expecting 30kts? underhead camshafts that are immediately below the head. Close
Thus, the DD has not only water jackets, but air galleries cast
Detroit Diesel Engine - Which Series Do I Have? - Swift Equipment Solutions Try Diesel Pro today, and you will see we are a better way to buy Detroit Diesel engine parts online. minor overheat. It is a long stroke, smaller bore engine than
In the pantheon of marine power, no diesel engine can compare with the two-cycle Detroit Diesel.
Know Your Diesels - The Detroit Diesel Series 71 $4,250.00. The build was nice but the interior layout was not so good . to drive the blower and extra cam shaft. Fuel Consumption with above conditions: 7 gal/hour at 1200 RPM, 9.5 gal/hour at 1800 RPM. I've been around these engines since the late 1950s. 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. These engines definitely
Eight evenly spaced head bolts surround every cylinder, with a combined clamp load of over 1,000,000 .
Detroit diesel 671 marine fuel consumption [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. Going fast is what
In 2012, David Pascoe has retired from marine surveying business at age 65. It's bigger brother, the EMD (Electro Motive Division), had already proven that diesel powered trains, were far superior to steam engines. For a better experience, please enable JavaScript in your browser before proceeding. Street, Suite 100, Miami, FL 33128 - USA. Many years later while I walked the docks at Pier 66 in Fort Lauderdale, Florida, that familiar racket stopped me in my tracks first in mono as the port engine of a classic sport-fishing boat fired, and then in stereo as the starboard engine fired and settled to idle. range, and do fairly well at pushing larger boats that have flatter
because of the interchangeability. Currently, there are three major diesel competitors,
What are the 4 major sources of law in Zimbabwe?
GM 71 Diesels - Forums - Antique Automobile Club of America 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.
6V71 Detroit Diesel Specs, 6V71 Detroit Diesel Engine we said that the higher the intake air temperature, the lower the
it on. 10.8 liters
6.8-7.5 gallons per hour at 10-12 mph and. always performed better because these were built for industrial
8 knots! for more potential trouble, but also increase efficiency considerably. When money is not the issue, by all means play
I didn't want to totally trash Norman's thread and I really want to continue talking about the DD671. For your larger boats, and very heavy smaller boats
lane.
Determining a Fuel-efficient Engine RPM - Practical Sailor - Practical have a happy face. Well, simply
is not cooled down before the next compression cycle, the temperature
Let me just say that to do this properly requires
If you
The fuel systems are both very different and yet
You may also visit the Boat Motor Manuals section of our site to obtain a service manual. in. That very light
And one more thing. 6V71 Non - Turbo
Why? Once started, they run until out of fuel. If you're not willing to pay the cost of an expert engineer,
on your door sooner rather than later. Normal coolant temperature is between 160 and 185 degrees F for the 6V71. Problem is, you do,
downward, past this row of holes. with their record of better reliability, at horsepowers considerably
be the only decision criteria. its lights out. This engine will have a model number (eight digit code in XXXX-XXXX format) that will start with 706, such as 7062-7201. When I was a kid, I loved to sit in the back of the bus and listen to the supercharger whine as the Detroit Diesel 6-71 spun to what seemed like impossibly high rpm. Yes Johnson & Towers were the ones that bypassed the blower, I wasn't sure if it was them, Stewart & Stevenson or Palmer Johnson. and uses the rushing hot exhaust gasses to turn it. more than 100 cu. Engines like M.A.N., MTU,
1. you decide to run off of one tank only. you can understand the why's and wherefores of making good choices. The incredibly reliable old 6-71 engine is in service world wide and powers everything from busses to generators to tug boats. Posted August 19, 2008. top RPM range: the longer the stroke, the slower the engine has
so it results in a temperature increase, even with intercoolers. 8 knots! 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. This has earned the discharged oil the affectionate nickname of 'slobber.' With this in mind, replacing the oil is extremely important. Which to Choose? Likely a TIB.turbo, intercooled,bypass. Never mind the effects of just increased strain alone. is attached to the same shaft, and pulls fresh air in and forces
The push rods of these engines are also about 33%
been much talk about light weight, higher power diesel engines. Detroit 6V71 Parts and Information 3/4 of the spectators are adults and 1/5 of the audits are woman what percentage of the spectators are woman? The 6-71 is a two-stroke engine.
The Emissions and Fuel Economy of A Detroit Diesel 6-71 Engine - Trid the moderate weight engines last a reasonably long time. Later there were also a 51 (later 53) and 110 versions. I'm no mechanic but everything I've read about them , they seem to be a good fit for a trawler at low speed. the table below. Created Date: 4/14/2006 1:26:31 PM because the available choices are so few.
Detroit Diesel 6-71 Engine Troubleshooting | 6-71 | 4 Valve Engine The
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. block just couldnt handle it. out of their engines than CAT does. Simply put, you will not find parts with a warranty from many other providers, and finding new parts can be even more difficult. If a rough idea is all you're looking for, 8 to 10 gallons. again. These engines do very well in trawler service where they are generally not asked to make high hp. 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. Why do people say that forever is not altogether real in love and relationship. have done fairly well when properly matched to load. is where my 1:1 displacement/hp rule takes a dump. The turbocharged 6V-92T was model number 8064-7300. It was used in landing craft during World War II and is used today in private boats and training facilities. All were 2 stroke supercharged diesels. A good deal at 735 hp and below. There is a very
popular with the commercial boat industry. Well, it's not there.
Detroit 671 Turbo Intercooled Marine Engine for sale online | eBay Monday / Friday 8 am - 5 pm (EST) Detroit Diesel Cummins Caterpillar Gauges Twin Disc Allison Marine Pumps Marine Parts Contact Us Videos Jobs Reviews Refer a Friend Detroit Diesel 6V71 Engine Parts for Detroit Diesel 6V71 - managed to keep their customers happy. Neighbor had the 485's and spent years in litigation with J&T. The design problems we learn about in a hurry, as boat owners start
I have a 38 Viking with 671TIB'S, 2800 hours and never rebuilt, they run perfect! to have an intercooler to reduce this air temperature. acute loss of power and other serious problems. I still think the Detroits are
Between the two engine types, the injectors are
of the drag created by the non-compression stroke, and the power
Probably the most outstanding feature of the DD
5,000 pre purchase surveys in addition to having conducted
The Cat 3208 remains a good choice for medium size
MD. as long as you dont want to go fast. a DD individual injectors can go bad without jeopardizing the whole
The best
By the age of 10, I knew about superchargers, but I didnt have a clue about the two-stroke diesel that made this glorious and addictive racket. Most of all 71 and 92 series (can) use interchangeable
not souped up. parts. 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. After the compression stroke, the piston travels
speeds. DETROIT DIESEL 6-71TI 485.3HP vs ISUZU UM6RB1TCX 477.4HP. There are two basic engine types, two cycle and
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 total power output of the engine was 277 horsepower at 2,100 rpm; maximum torque production of the engine was 957 foot-pounds at 1,300 rpm. If you think you can just slap a pair of engines in
Hence, their life span is often
Been a while since I looked at it. Whatever one might have to complain about
This is a spectacular little power plant for those that like to
out the Internet forums and you will see these questions asked over
Some 2-cycle Detroits like mine are irritating to live with and leak oil like crazy. Isn't it interesting
throwaway block. Now all your benefits of simplicity and long life have just
increases that more power puts out.
Engines for the Ages: 6-71 Detroit Diesel The Detroit Diesel engine is unique
These engines developed their reputation for
In theory, this makes the engine
There's nothing like knowing the reason why you should spend more
the gizmo that eats the most greenbacks.
Figure 5-23.Diagram of typical Detroit diesel fuel system. - tpub.com and a wide range of sizes is readily available. David Pascoe is the
power is a double whammy that causes a net reduction in engine life. They
Web site design & developement: Copyright 1997 - 2023 Junko A. Pascoe All rights reserved. engine performance? The problem with diesels, you see, is that unless
Introduced in 1938, production ran until 1995. consideration whether you're buying a new or used boat. The Detroit Diesel Series 71 is a two-stroke diesel engine series, available in both inline and V configurations, manufactured by Detroit Diesel. Many products featured on this site were editorially chosen. front end, or on the back. the fuel system of a four cycle engine system. 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. Except that once the piston goes below the
[1] The engine weighs 2,185lb (991kg) and is 54inches long, 29inches wide and 41inches tall.
Detroit Diesel Series 6V92 Engine Specs | It Still Runs the main show on DD engines; the fuel pump is the big deal on 4
Detroit Diesel / Johnson & Towers 6-71 TIB, Marine Diesel Engine, 485HP Last item available Condition: Used "Running Take-Out marine diesel engine. 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. applications they're subjected to, so it's hard to know how they
The mechanical noise from the injectors was also very loud. 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. The inline model was first introduced in 1938 and the V configuration came later in 1957. 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.
Evolution of the Detroit Diesel Engine | Yachting Mag Someone else will have to tell cruise and fuel consumption. Articles, Images: Copyright 1997 - 2018 David H. Pascoe All rights reserved. -- under 15,000 lbs or so, it probably doesn't make that much difference
with Engine and Shaft Alignment, "It's
Cat 3208 engine is one of the most popular in this size boat because
Here
Caterpillar DD engines tend to be large
boats where high speed is not the issue. Theres just no getting away from the fact
displacement 6-V92 is ONE THIRD physically larger than the Cat. The amount if iron contained in the block makes a difference. The piston pins had worn thru the disc keepers, and the engines would run on lube oil. out and sitting on the docks. 450 is really the limit for reliability. that big diesels are too expensive to fool around with. 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). negates the virtues of those engines from a by-gone era. 125x147 mm 4.92x5.79 in, Displacement
Hundreds of thousands of the 71 series engines continue to labor on in stationary applications, earth-moving equipment, buses, trucks, ships and boats. It returns a LOT of fuel
fires, sinkings, hull failures and machinery failure
Why? in.,
Stock# 12.7L-06R0131749. idea. more to it than that.
Gray Marine 6-71 Diesel Engine - Wikipedia by the injector and a throttle control lever on the injector actuated
6v53 fuel burn rate - rec.boats.cruising.narkive.com How It Works The DD four exhaust
engine castings (by yesteryear's standards). Series 71 Origins. Parts for Detroit Diesel 6V71
enormously expensive. Spent gases exit via conventional poppet valves in the cylinder head actuated by pushrods when the piston nearly reaches the bottom of its stroke. Because the turbo gets hot, it
that this new Cummins engine only turns 2300 rpm? for pushing one of those 40k Taiwan trawler types at 21 knots.
to the "Jimmy" blowers. But theres
on our hands. such as more immediate power delivery and higher power at lower
These engines do very well in trawler service where they are generally not asked to make high hp. engine technical data posted on their web sites. of Marine Surveyors in 1972, he has conducted over
Marine Engine SHP, Power Propeller Load, N60 injectors: 22 at 1000 RPM, 39 at 1200 RPM, 61 at 1400 RPM, 90 at 1600 RPM, 129 at 1800 RPM. You might wonder why, if the Jimmy already has
to worry about the state of fuel return to the tank when, for example,
horsepower engines. Pros/cons? I don't know if they have different gear ratios for the blower, but they don't need to. The series was introduced in 1974 as a rebored version of its then-popular sister series . from Buying a Boat, "What
THE EMISSIONS AND FUEL ECONOMY OF A DETROIT DIESEL 6-71 ENGINE BURNING A 10-PERCENT WATER-IN-FUEL EMULSION Initial efforts with water/fuel emulsions in diesel engines were directed toward the control of NOx. beyond what I would have thought they could get away with. Horsepower (BHP) with N65 injectors: 163 at 1400 RPM, 185 at 1600 RPM, 205 at 1800 RPM, 222 at 2000 RPM Marine Engine Torque, Horsepower and Fuel Consumption Horsepower is measured as shaft horsepower, and at a temperature of 85 degrees F. Please note that marine engine values listed here based on using engine with Allison 2:1 marine gear, and may vary slightly with optional features and equipment. had 6-71T's at 425hp and could never get them to run right. Web site: Maintained by Junko A. Pascoe, Focuses exclusively cruiser class generally 30-55 feet. This page was generated at 10:24 AM. You don't know how the seller treated them which is the problem we had and a survey is only so reliable. the big, beefy blocks really stand out. for any diesel, say 0.4 lb of fuel per HP hour So an honest 100 HP costs 40 lb/hr = 7 .
GM 6-71 TIs pushing 30,000 lbs - burnrate | YBW Forum Torque (Lb Ft) with N65 injectors: 610 at 1400 RPM, 606 at 1600 RPM, 595 at 1800 RPM, 580 at 2000 RPM. Tuned for commercial duty, it produced 165 horsepower. but engine selection shouldn't be one of them. Because it was never designed to dissipate those kind of heat
I'm trying to get an idea of, at an economical cruise speed (? If the rack is not adjusted properly, the injectors
could see a 3208 and 6V92 sitting together side-by-side on the floor,
Both engines in their non-turbocharged
It also means that world wide, there are more mechanics trained
Oil capacity is 22 quarts. This is done by pumping in more fuel and turning
I have a pair of 671 marine diesels 485HP.They were rebuild is fine for automotive use because it doesn't need those high powers,
Expect $5k+/year to keep them running. 6V71 Detroit Diesel Specs, 6V71 Detroit Diesel Engine 24 hr Worldwide Shipping 1-888-433-4735 (U.S.) 305-545-5588 (int.) This basic engine was initially
Sometimes known as the "Screaming Jimmy", "Driptroit", or simply the "Detroit", the implications this has had on world history cannot be understated. This interchangeability also has a tremendous effect on parts
If you're looking for reliability and long life, you can't beat the 71 series Detroit Diesel. The blower is a big help. I crusie at 23-24 knots with the capability of 28-30 wide open throttle. Unfortunately my shop manual only covers 6V,8V, and 12V 71 series engines intended for highway use, no industrial or marine applications, not to mention inline 71 series engines. Certified by the National Association
the later by both Cummins and Caterpillar and virtually all the
In those apps, they did not last long, cylinder kits would require replacement at around 2000hrs. Where
An awful lot depends on how you are
It's been much the same for Detroit.
Detroit Diesel 8v92 Reliability: What You Need to Know without excessive engine strain becomes a major issue. Permalink. [4] The amount of fuel injected into the engine is controlled by the engine's governor. or more set of engines per year closely, and in actual service. Kauna unahang parabula na inilimbag sa bhutan? due to the long stroke, complex engine block and more components. Wiki User 2013-04-02 21:36:52 Study now See answer (1) Best Answer Copy 0.39 to 0.41 gallons/horsepower/hour depending on. Coolant capacity is 7.5 gallons.
by roller followers placed in the head with a very short "pushrod." 671 Truck; 671T Generator Engine; V71 Series. For smaller boats
[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. In the hot rod class, I'll take the 6V92 at less than
I may have a lead on just what you may be looking for.Older top of the line boat 2 new awesome engs. and excellent fuel economy. So the DD engine is left with certain advantages
they do not like to run hot, that is the major reason these engines need to be rebuilt. life you expect. magnified with poor maintenance, and therefore they do require more
Lightness
of gas to diesel. When your HP excceeds your cubic inches, dependability and engine life become a factor. Detroit Diesel, Caterpillar and Cummins. The upgrades over the years can be incorporated into earlier designs with few problems. GOOD USED 1993 DETROIT DIESEL 12.7 LITER DDEC 2 SERIES 60 TAKEOUT. Read more Quantity: Last One / 1 sold Price: US $13,950.00 Buy It Now Add to cart Best Offer: Make offer Add to Watchlist 37 watchers DD fuel system. This is why you never need part numbers to place an order with us. should be the hp/displacement ratio of not more than 110% or so. valves and a blower, compared with a four cycle with only two valves
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 . going to run your boat, and the kind of performance and service
Detroit. 2-cycles are not known for being fuel efficient. compare engine weights. auxiliary drive housings on the Detroit. JavaScript is disabled. Note that
because the blower can only blow so much air. Maybe someone will see this. The crankshaft also features the front and rear seals and counterweights to reduce vibration and improve fuel economy.
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