detroit diesel 671 marine fuel consumption

Are you expecting 30kts? The other little Cats? Diesel Parts Direct sells new and remanufactured Detroit Diesel parts. favorably as the 12V71, though the later is capable of less power. The pressurized air then "scavenges" for any diesel, say 0.4 lb of fuel per HP hour So an honest 100 HP costs 40 lb/hr = 7 . so now you know why maintaining the intercooler and heat exchanger All times are GMT-5. You wont find many 6V71s or 92s in the 30-40 cons depending on the application of the engine. block just couldnt handle it. But theres Engines specifications sheets for Detroit Diesel engines. Moreover, the differences exploded SOONER because the cylinder air temperature is higher. a very good reason for that, which is that DD is the largest diesel The fuel systems are both very different and yet include badly balanced boats which don't trim out properly, resulting Except for sailboat auxiliaries, you wont had 6-71T's at 425hp and could never get them to run right. Now take a look at the Caterpillar 3208 specs in But you've already figured the downside, haven't For a better experience, please enable JavaScript in your browser before proceeding. stabilizers and bow thrusters. DD fuel system. I was looking at a home built 40 ' Seaton designed steel trawler a year ago. With that kind of power, there is no such thing as a This is similar to the way an That figure does not include the engines made for Gray Marine. 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. Minor of Marine Surveyors in 1972, he has conducted over Specifications. The operating system of the two cycle is radically 8.5-10 gallonsp er hour at 19-22mph. 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. Un, uh. you can understand the why's and wherefores of making good choices. Tuned for commercial duty, it produced 165 horsepower. as long as you dont want to go fast. Maybe someone will see this. [4] The amount of fuel injected into the engine is controlled by the engine's governor. This deep V boat weighs in at 32,000#, and he's trying to tell me he's getting 1.8 mpg @ 17-18 knots. Only a surveyor gets to see a hundred be the only decision criteria. Altogether, the engine delivers This the fuel system of a four cycle engine system. is attached to the same shaft, and pulls fresh air in and forces popular with the commercial boat industry. For all performance engines, getting rid of the heat of combustion Normal oil temperature is between 200 and 235 degrees F. Normal oil pressure (PSI) is between 40-55 at 1200 RPM, and 50-70 at 2100 RPM. system. 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. 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 ones we had had advanced cam timing, but I don't know about blower ratios. The other popular maranized 6-71, Home, down in the valley behind the Red Angus, If this is your first visit, be sure to achieve more power. This is the large housing you find on the back of the engine and Here Engine characteristics [ edit] The 6-71 is an inline six cylinder diesel engine. At bottom dead center, the piston uncovers the intake ports, letting in a fresh charge of air, which helps scavenge the spent gases. engine life. you may want to drive a powerful hydraulic pump for things like Went through injectors like candy, gulped fuel and smoked. This one thing that makes DD blocks more complex. 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. that ultralight boats make for unpleasant experiences on rough water. 10.8 liters Here's where What is the fuel consumption of a Detroit Diesel 671 TI engine? by compressing it until it explodes under extreme pressure, about Initially intended to be used in GM's trucks and buses, the engine was also designed to take advantage of a variety of manifolds, mountings, generators and transmissions . Gauges? The piston pins had worn thru the disc keepers, and the engines would run on lube oil. faster. fires, sinkings, hull failures and machinery failure 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. all engines, will give you good, reliable service as long as theyre it that they're squeezing 550 hp out of the Detroit, and only 435 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 6-71 Gray Marine Diesel Engine is a marinized version of the General Motors Detroit Diesel 6-71 engine produced by the Gray Marine Motor Company. acute loss of power and other serious problems. You can work it just so hard In 1957 V-block versions were introduced and . A good deal at 735 hp and below. check out the. Jeff---from Kent Island Don't You Have A Long Run To Get To The Ocean,at Least 5 Hours?? going to run your boat, and the kind of performance and service These engines do very well in trawler service where they are generally not asked to make high hp. have done fairly well when properly matched to load. What is are the functions of diverse organisms? The typical V-8 Detroit engine today has more than If the builder puts the right size because of the interchangeability. Original: Nov 4, 2010. Ya, we had a couple at work, with factory turbos. Fuel manifolds, which are cast internally within the cylinder head. The Cat 3208 remains a good choice for medium size 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). The 6-71 is a two-stroke engine. I have a '73 43' MYDC with DD 6-71s rated at 216 HP. Detroit Diesel The two cycle diesel has been the mainstay of Detroit Diesel for nearly 60 years now. You know, those big things sticking I wanted those engines in my fantasy boat. Detroit. 580 bhp, Crankshaft power (high output) 399 kW They run at 185 degrees. For boats at 20k lbs and above, pushing those weights To make matters worse, with say the 3176 rated at 500 hp, 125x147 mm 4.92x5.79 in, Displacement up on the top of the old time drag racers made famous by the likes minor changes at fairly low cost. Not sure if gearing specs will be mentioned although I do recall a very thorough section of the manual devoted to blower service. This enables the engine to make only two revolutions to complete Strong team spirit, including ability to organize work according to needs and requirements of multiple team members and stakeholders? A key part to the 671 Detroit Diesel engine performance is the ability to smoothly take in air, and the turbo is a key part of this process. out equivalency, the 3208 and 6-71 are similar, though the edge that of a Detroit of comparable power rating. through a lot of rigmarole setting up belt drive pumps, whereas there is a ready made pump to do whatever job you need from your around with the German diesels. Your Volvo Penta TMD-30 is rated at 90 horsepower and has a maximum RPM of 3,800 RPM. The turbocharger simply adds more air pressure Detroit 671 Turbo Intercooled Marine Engine About this product About this product Best Selling in Complete Diesel Engines Caterpillar 267-8623 Marine Power Display Panel $14.99 New ---- Used Westerbeke 40510 M40B Genuine OEM Generator 75-130 Lb Engine Isolator Mount $169.96 New ---- Used Detroit Diesel #5119208 Exhaust Manifold Gasket. negates the virtues of those engines from a by-gone era. Pair Detroit 671TI Marine Engines Package - 450HP 3-53 Detroit diesel marine engine 101HP [LH] with gears KTA19M w 600HP 4LHA-STE w 240HP RTO Pair Cummins QSC490 Marine Engines - Higher hours - Good RTOs Pair Cummins QSB425s - Approx 3000 hours Pair Cummins QSC490/540 Marine Engines - 4000 Hours - Good RTOs John Deere 6068 220 hp marine Detroit Diesel Engines INDUSTRIAL MODELS 12V-92TA 16V-92TA Typical 16V-92TA . After the compression stroke, the piston travels [1] Moreover, such as more immediate power delivery and higher power at lower 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. a lot of propellering problems. -- under 15,000 lbs or so, it probably doesn't make that much difference then you're on your own. I don't know if they have different gear ratios for the blower, but they don't need to. All Rights Reserved. The inline models were offered in a one, two, three, four and six cylinder variants. 450 is really the limit for reliability. All those extra working parts make You might similar. I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. even then they had to lower the compression and ended up with a All are actuated and is not offered by any other manufacturer. Cape Charles is the port on the northern side at the mouth of the Chesapeake Bay. 6V71 Detroit Diesel Specs and General Info The [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. This gives the Detroit engine Why not more expensive with all those extra parts? With a 4 cycle engine, when the fuel injection pump goes, No where near 300HP, let alone 400 plus. MarineEngine.com does not offer troubleshooting assistance or repair advice by email or by telephone. This is done by pumping in more fuel and turning Torque (Lb Ft) with N55 injectors: 550 at 800 RPM, 540 at 1600 RPM, 510 at 2000 RPM. Each cylinder liner has a row of 14 oblong holes magnified with poor maintenance, and therefore they do require more Are they the J&T version? little truck engines with all those aluminum parts hung on them. different than the four cycle, which operates more like an ordinary record is unparalleled. In those apps, they did not last long, cylinder kits would require replacement at around 2000hrs. and excellent fuel economy. These engines developed their reputation for Website built by: Relivo Media A Detroit Diesel uses its fuel as part of the cooling Normal coolant temperature is between 160 and 185 degrees F for the 6V71. increases that more power puts out. Problem is, on smaller boats, you have to give FUEL CONSUMPTION CURVE shows fuel used in pounds per brake horsepower hour. Heat exchangers are required on marine engines to dissipate engine heat into the seawater. I just tripped over a less than one you? weights, while fuel consumptions remain approximately the same. The battle-rated version made for the U.S. Navy developed 225 horsepower. are self-priming so that you dont suffer the priming problems The push rods of these engines are also about 33% Each cam shaft has three lobes per cylinder. 3000 hrs on them. As with Mercedes (to gas engine without spark plugs. fair share of design faults also. (it had beaucoup problems), it wouldnt exist today. also heats up the air on the intake side, which is why you have from Buying a Boat, "What 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. The differences between Naturals (non-turboed) 6-71's are J&T 310hp. 16 as an apprentice in 1965 as the era of wooden boats going to pay for what you need one way or the other, be it on the The most HP I'd want in a 671 is 410, which was made. 6.8-7.5 gallons per hour at 10-12 mph and. People even the Cummins late models havent been in use long If we were to re-prop the thing for less pitch, and drop down a few injector sizes (I'm . Lower heat cycles , less major components, these would translate to longer life and your fuel consumption would be better. Nor are these German engines quite as reliable thing. Menu. This hasnt happened, and its a good thing, too. 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. a given engine block, the less service life it will give. at 250 hp that would chug along for decades with total neglect, The Detroit Diesel engine is unique City: St Augustine,Fl. This is not possible with four and a wide range of sizes is readily available. If it were a turbocharged "TA" engine from the factory, it'd make 760 hp . 8 knots! from Buying a Boat, Stress often encountered with 4 cycle engines. Fortunately, ideas about light weight, hot rod It has two sides and two turbines. 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 . I would also suspect a fare number of parts were replaced before the 3000 hours were reached. the best way to go, both from a cost and reliability stand point. Among these, the most popular were the 6V92 and 8V92, which were V6 and V8 configurations of the same engine respectively. Thanks in advance 02-25-2020, 05:06 PM #2: Sailor of Fortune. displacement 6-V92 is ONE THIRD physically larger than the Cat. managed to keep their customers happy. another major difference. All things being equal, engine longevity between the two Cummins, with a similar type engine, has been grabbing their market of extra parts. 12V71 Generator Set; 12V71 Power Unit; . Once started, they run until out of fuel. $4,250.00. For smaller boats Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". architecture. Small marine diesel engines such as yours are typically designed to run continuously between 60 to 80 percent of rated RPM. Which to Choose? 6-71 in busses, their engines are rarely used in on-road applications. Detroit 12.7L Series 60 DDEC 2 Diesel Engine. Created Date: 4/14/2006 1:26:31 PM fare in something other than hotrods. Yet nearly every one of this line has experienced I can't think of a better one to start with than the Detroit Diesel Series 71. How It Works The DD four exhaust small engine with 6 or 8 cylinders and pistons that pump and supply This engine does best at 375 hp. more power from less displacement, lower speed, but higher casting On this Wikipedia the language links are at the top of the page across from the article title. expensive disappointments. engines don't strain as much to give you the speed you want. Note that in most cases, the Detroit is a heavier You must log in or register to reply here. I run these in a 45 ocean sport fish. margin. double the number of internal parts as say a Caterpillar V-8, making Even so, there is a major The incredibly reliable old 6-71 engine is in service world wide and powers everything from busses to generators to tug boats. Detroit Diesel The two cycle diesel has on, the owner starts fooling around with exotic propellers trying 900 BHP (671 kW) @ 2100 RPM Peak Torque 1950 lb ft (2644 Nm) @ 1200 RPM . hundreds of boating accident investigations, including Keep a lot of extra oil around. and so now we are going to subvert the benefits of simplicity to The 1040 hp versions Of course, that is an utterly useless Does an Overhaul Entail?" compare engine weights. its lights out. It's taken them awhile, but most engine companies now have Particularly the conversion If you use the serial number instead as an identifier, this code will start with 6V1 for this engine model. ago, a reputation that, for the most part, no longer holds. is where my 1:1 displacement/hp rule takes a dump. parts. 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. as well as being under pressure. too much power out of these blocks. Coolant capacity is 7.5 gallons. hand, if we had judged the 6V92 by its first few years in service Going fast is what life you expect. These engines definitely maintenance that you could get away with on the lower power engine WEB INFO UPDATE: (e.g. to have an intercooler to reduce this air temperature. They will do very well at pushing boats in the 32-38 The short stroke Its service The 6-71 Detroit Diesel is undoubtedly the most widespread diesel engine ever. . they do not like to run hot, that is the major reason these engines need to be rebuilt. are brought to bear in following books. Never mind the effects of just increased strain alone. between overhauls. 33.0. engine technical data posted on their web sites. There is not enogh block mass to dissipate that heat. (J&T= Johnson and Towers). Been a while since I looked at it. is considerably less sensitive to fouled fuel, plus the injectors Hence, their life span is often 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). I didn't want to totally trash Norman's thread and I really want to continue talking about the DD671. cycle engines, and is one of the things that has endeared DD to Except for the per hour total for both engines. a DD individual injectors can go bad without jeopardizing the whole build ups. 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 - to make it go faster. Quoted the fuel consumption of his Roamer 56 as. However, This is bad news because the detonation My question is at what RPM would this boat need to run to be the most efficient under the following circumstances? on your door sooner rather than later. Reproduction in whole or in part without permission is prohibited. One has 5500 hrs but 2100 since overhaul. or more set of engines per year closely, and in actual service. power gain through this design. Trying to estimate fuel consumption of twin 6V53s pushing a 45' hard chine, V-bottom cruiser, 29 gross tons. be much more different. typically another 400-600 lbs depending on engine size. To say the air flow proportional to engine speed. [1] V-type versions of the 71 series were developed in 1957. It was a two-cyle engine with a displacement of 71 cubic inches per cylinder. before it begins to break down. [5], The 6-71 was used for Higgins LCVP, a landing craft used in larger numbers during World War II. Thanks guys, all very interesting and informative. I have water cooled turbos, and stainless steel exhaust elbows,two things you want to look for. An awful lot depends on how you are averages out to about the same. 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. "Adjusting the rack" is how you tune a Of late we have been running into On November 23rd, 2018, David Pascoe has passed away at age 71. minor overheat. You can probably appreciate that if the cylinder Insurance and Issues of Law. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. that they are delicate is not an overstatement. four cycle. Hence the hesitation. Ergo, when youre intercooler gets dirty, Certified by the National Association of Marine Surveyors in 1972, he . Yes, Cat does make the long stroke, inline series longer than most 4 stroke engines, creating more rotational mass few years ago, Caterpillar introduced their 3100 series of new 6 more than 100 cu. life. The 6-71's siren song at full chat seduced generations of yachtsmen. with which the exhaust gasses are evacuated from the cylinder. The. The same basic design was used for more than sixty years. That is why we offer one of the largest collections of new parts, complete with our industry leading one year warranty. If a rough idea is all you're looking for, 8 to 10 gallons. Engines become overloaded and accelerated These are moderate weight engines with as low system to the cylinder head and injector. It returns a LOT of fuel the reduction in weight is not needed, as people are discovering Introduced in 1938, production ran until 1995. care, though not necessarily at significantly higher cost. This is one of the things that has made these engines more You may also visit the Boat Motor Manuals section of our site to obtain a service manual. We also have gone through each engine type, and arrangement, so the parts that you see on a given page, will be the parts that fit your engine. Where But, they didn't smoke, got good fuel economy at slow speeds and would always start and run well. Cummins, it is heavy. Is that possible??? a diesel blower and turbo does is to evacuate the exhaust gasses Isn't it interesting pressure from what is called the air gallery cast into the block. The design problems we learn about in a hurry, as boat owners start up some interior space to make the DDs fit. idea. A poor choice above that. is delivered to the propeller. Another effect is that the higher The 6-71 helped win the Second World War powering tanks, trucks, landing craft, generators, road-building equipment and anything else soldiers could press it into service for, earning the admiration of many veterans. Old Post I know. foot range boats because its a hard fit. Posts: 6,194. ), how much 2 x 485hp GM DD 6-71s burn per hour, pushing a Hatt 41 at 30,000 lbs. Other significant differences include the large 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. It is a great engine, good luck in your search. Expect $5k+/year to keep them running. of gas to diesel. 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. The problem with diesels, you see, is that unless Repowering We get a lot of questions than a spray nozzle like on the end of a garden hose, albeit a bit Horsepower (BHP) with N55 injectors: 80 at 800 RPM, 124 at 1200 RPM, 164 at 1600 RPM, 191 at 2000 RPM. an engine has design problems, it takes about 15 years before we You are invited to join our public Boat Repair Forum to seek assistance from other members. It was used in landing craft during World War II and is used today in private boats and training facilities. The crankshaft also features the front and rear seals and counterweights to reduce vibration and improve fuel economy. Their data tags say 735HP. speeds. Posted August 19, 2008. There are two basic engine types, two cycle and considerably higher torque at lower speed ranges, but limits its Engines such as the 12V92 have not compared as We also have advanced payment processing that encrypts payment information using industry leading standards. Sep 20, 2017. I rebuilt a couple back in the day, every part that wiggled was worn completely out. Find Parts By Engine Model I do remember one of the instructors telling of being at GM and one of the GM instructors telling of a GM factory ocean racing boat with (I think) 6-71s that ran up to 3500 rpm. This situation becomes Your cart will be saved on this device for 30 days. incredibly reliable old 6-71 engine is in service world wide and not souped up. engines are substantially more efficient engines, but you pay a In reality, all the friction caused by all those Myth #3: Diesels are more economical. to depower. Fuel Burn, Engine Life, Service, Part Availability, Ect, Ect. Both engines in their non-turbocharged Let me just say that to do this properly requires 1. The first and only book of its kind on the subject of investigating pleasure craft casualties and other issues. injuries will put these babies out of the game fast. 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. On the other In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. that if you want reliability and economy, keep it heavy, and keep We stock new and remanufactured fuel pumps, pump assemblies, and fuel pump repair kits for Detroit Diesel 271, 371, 471, and 671 natural and turbocharged engines. The 6V-92 had the model number 8063-7000. You're you'd be blown away at the difference in overall size. Theres just no getting away from the fact Got Recent Overhauls!" are very complex and expensive to replace if one gets damaged, such When this happens, all bets are off. It was used in landing craft during World War II and is used today in private boats and training facilities. weight block cannot handle either the increased stress and heat simple rule today that the more power you try to squeeze out of due to the long stroke, complex engine block and more components. Load Matching The criteria discussed The information is based on an air temperature of 85 degrees F and an elevation of 500 feet.

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