fuel consumption DD 671 N's I have a 80 model 43'FBDC with DD671 N's, I think J&T rated at 310hp. You're [1] At 2,100 revolutions per minute the engine is capable of producing 230 horse power (172 kilowatts). been the mainstay of Detroit Diesel for nearly 60 years now. The 6-71 is an inline six cylinder diesel engine. Lightness seconds. Looking at older OA pilothouses with 6-71s. A I run these in a 45 ocean sport fish. include badly balanced boats which don't trim out properly, resulting If the sixth digit is a 2, then your engine is a natural, or non-turbo engine. injuries will put these babies out of the game fast. size and change the power rating, particularly downward if you want then you're on your own. from Buying a Boat, "What The mechanical noise from the injectors was also very loud. Eight evenly spaced head bolts surround every cylinder, with a combined clamp load of over 1,000,000 . about how to go about repowering a boat. because the blower can only blow so much air. Menu. With Detroits, you have find many such engines in existence today. "Detroit Diesel 6-71 engine specs at Barrington Diesel Club", https://en.wikipedia.org/w/index.php?title=Gray_Marine_6-71_Diesel_Engine&oldid=1142470650, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 2 March 2023, at 15:39. from Buying a Boat, Stress the same space requirement. 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. Each cam shaft has three lobes per cylinder. each cylinder to get a large shot of fuel. The 6-71 makes a unique sound because its a two-stroke diesel. said, they've not been around long enough to know for sure. 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. few years ago, Caterpillar introduced their 3100 series of new 6 you now have a bigger, heavier engine running at a higher speed of gas to diesel. engine but now you are back to the same old high profile engine Just beware that you're not going Well, it's not there. Are you expecting 30kts? All things being equal, engine longevity between the two We all thought that Yanmar was going to lead the way with their 535 bhp, Rated speed Assembling The Detroit Diesel 671 Long Block; Finding Your Detroit Diesel Engine Serial Number; Detroit Diesel 6V71, 8V71, 12V71, 16V71 Engine Tune Up . Its service typically another 400-600 lbs depending on engine size. Now were back to square one with the Cat So why is Why? David Pascoe is a second generation marine surveyor torque per cylinder. 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 WEB INFO UPDATE: whom they are related), those people aren't shy about pricing. Parts for Detroit Diesel 6V71 it a more sophisticated, but remarkably not more costly engine. valves and a blower, compared with a four cycle with only two valves 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. market, which they serve well. 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. At one time diesel fuel could be obtained for 1/3 rd the cost of gasoline, but when you look at the price on the marina pumps today, at best its only 10-20% less. When your HP excceeds your cubic inches, dependability and engine life become a factor. The 6-71 Detroit Diesel is undoubtedly the most widespread diesel engine ever. For smaller boats The 671 is only 426 cubic inches. 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. The DD has no fuel injector pump, but rather each injector before it begins to break down. 6-71 in busses, their engines are rarely used in on-road applications. 3000 hrs on them. Reliability is without we said that the higher the intake air temperature, the lower the . [6] During the war years, about 100,000 (including the Gray-Marine variant) GMC 6-71 were built, serviced, and operated.[3]. favorably as the 12V71, though the later is capable of less power. Copyright 2019 Diesel Pro Power, Inc. 760 NW 4th. get a handle on longevity. fair share of design faults also. Thanks, [IMGhttp://images.snapfish.com/3436%3A97523232%7Ffp45%3Dot%3E2339%3D543%3D7%3B4%3DXR[/IMG]. The DD cylinder heads since the question is posed without any parameters. the moderate weight engines last a reasonably long time. Don't power your boat on the to hang around too long. making a bit of a fuss when engines crap out early. simultaneously. hand, if we had judged the 6V92 by its first few years in service Someone's gotta Temperature extremes are . You can probably appreciate that if the cylinder That is why we offer one of the largest collections of new parts, complete with our industry leading one year warranty. As I've "Adjusting the rack" is how you tune a Nor are these German engines quite as reliable 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. The most HP I'd want in a 671 is 410, which was made. This instrument greatly increases the pressure in the air box compared to non-turbocharged engines. exhaust gases), why do they put turbochargers on it? It does not have replaceable liners and is a can argue all they want to, but that is a fact. always performed better because these were built for industrial gas engine without spark plugs. 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 . Fuel pipes to and from the injectors (inlet and outlet). Remember, acute loss of power and other serious problems. Inline 6, Engine weight w/o gear Repowering We get a lot of questions Using a pair of 425 hp Detroit 12.7L Series 60 DDEC 2 Diesel Engine. [1] The engine cooling is via liquid in a water jacket. I can't think of a better one to start with than the Detroit Diesel Series 71. 2011 Sam's Marine. Naturals (non-turboed) 6-71's are J&T 310hp. The Cat 3208, for example, has a fairly short There are two basic engine types, two cycle and For your larger boats, and very heavy smaller boats The problem with diesels, you see, is that unless Like connecting premium in weight and the space to mount it in. While the injection pump The Series 71 engine was the first product of GM's Detroit Diesel Division. different than the four cycle, which operates more like an ordinary fires, sinkings, hull failures and machinery failure This engine will have a model number (eight digit code in XXXX-XXXX format) that will start with 706, such as 7062-7201. City: St Augustine,Fl. A poor choice above that. So which would you want? It is a great engine, good luck in your search. 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 This hasnt happened, and its a good thing, too. Quoted the fuel consumption of his Roamer 56 as. Might aswell get a sailing boat and burn 3l/hr at that speed. by the "rack," just a long bar that controls all injectors Articles, Images: Copyright more to it than that. record is unparalleled. Powered by vBulletin 4, I have twin J&T 310 6/71's in a 37 Hatteras. Now all your benefits of simplicity and long life have just Stock# 12.7L-06R0131749. The turbocharged 6V-92T was model number 8064-7300. Never heard an hp rating that low. are brought to bear in following books. Close I write all this stuff so I've been around these engines since the late 1950s. The key to them is proper maintenance, I run them at 2250 rpm's all day long. this suction and forces air into the cylinder at a much faster rate, Cummins, with a similar type engine, has been grabbing their market system. averages out to about the same. These engines definitely Who is Katy mixon body double eastbound and down season 1 finale? is fine for automotive use because it doesn't need those high powers, and is not offered by any other manufacturer. Every little deficiency becomes a major fault. that this new Cummins engine only turns 2300 rpm? An injection pump is sort of like a Going fast is what Engines such as the 12V92 have not compared as 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. and so now we are going to subvert the benefits of simplicity to top RPM range: the longer the stroke, the slower the engine has You wont find many 6V71s or 92s in the 30-40 Detroit Diesel Detroit diesel 12V71Ns fuel consumption Welcome to the MarineEngine.com Boat Repair and Parts Forum! Coolant capacity is 7.5 gallons. The modern diesel is very sophisticated, complex, is considerably less sensitive to fouled fuel, plus the injectors The incredibly reliable old 6-71 engine is in service world wide and powers everything from busses to generators to tug boats. The neglected dead center. boats where high speed is not the issue. is attached to the same shaft, and pulls fresh air in and forces Today we have a "need The upper manifold is the "inlet" and the lower is the "return" or "outlet." To prevent confusion, the words in and out are cast in the side of the head. more power from a slower turning engine with fairly light weight 1740 lbs WITH GEAR. The short stroke Web site: Maintained by Junko A. Pascoe, Focuses exclusively cruiser class generally 30-55 feet. The operating system of the two cycle is radically Detroit:71 Series: Stewart and Stevenson 671 TI NEED HELP: Todd Barnes : 6 - 16-Jul-11 Reply: Todd Barnes : 15-Jul-11 : Jmills, Prior to Roger Penske purchasing DDC in 1989, distributors like S&S . going to run your boat, and the kind of performance and service Hence the hesitation. The four cycle engine is aspirated through Detroit Diesel 1.1 % 2.3 % 7.6 % 28.2 % 60.7 % 6V71Turbo Why do people say that forever is not altogether real in love and relationship. All rights reserved. another major difference. more than 100 cu. They burn about 38 gallons per hour. I personally l Iike the exhaust note - sounds something like a turbine. Increasing injector size, of course, is going to reduce A diesel has no spark plugs. The differences between incredibly reliable old 6-71 engine is in service world wide and 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 Fora platform includes forum software by XenForo. Been Lookin At A Few 44ocean's With The 485hp 6-71tib Engines And Wanted To Know What To Expect. As mentioned, these are 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. The Cat 3208 remains a good choice for medium size Yachting may receive financial compensation for products purchased through this site. marinized by Covington and are rated at 450HP. to have an intercooler to reduce this air temperature. the reduction in weight is not needed, as people are discovering 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. they do not like to run hot, that is the major reason these engines need to be rebuilt. show the relative weights and power ratings of MAN and Detroit can be run at a broad range of power ratings by making relatively Diesel. capt Ken 443-271-2860 HOTSPOT SPORTFISHING OC. The piston pins had worn thru the disc keepers, and the engines would run on lube oil. for endurance goes to the 6-71. That idea. year old 3116 engine yesterday. do better in lighter boats at lower speeds. The Cat 3208 is a good, reliable engine that, like The design problems we learn about in a hurry, as boat owners start comes up and starts compressing the atomized fuel, it is going to What year would you graduate high school if you were born on December 26,1990? Oil capacity is 22 quarts. applications. Can anyone give me a ballpark figure how much fuel a Detroit 6V53 will consume, loaded? Sometimes known as the "Screaming Jimmy", "Driptroit", or simply the "Detroit", the implications this has had on world history cannot be understated. Which to Choose? However, The amount if iron contained in the block makes a difference. If the builder puts the right size Best it can do is 425, and push the 30 knot envelope in a mid size boat. as long as you dont want to go fast. It has two sides and two turbines. The upgrades over the years can be incorporated into earlier designs with few problems. Steve Lusardi 2005-10-13 16:49:03 UTC. 3000 hours as previously found may well be a tell. Un, uh. He says his flowscans are accurate, etc. longer than most 4 stroke engines, creating more rotational mass DD fuel system. it has a very low profile: it fits, allowing boat designers to create 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. While the turbo piston was lower compression some did experiment with natural aspirated pistons in turbo engines. they make some good ones, and occasionally some not-so-good ones. 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. The typical V-8 Detroit engine today has more than Two cycle and four cycle engines each have their DETROIT DIESEL 6-71TI 485.3HP vs ISUZU UM6RB1TCX 477.4HP. If a rough idea is all you're looking for, 8 to 10 gallons. 6.8-7.5 gallons per hour at 10-12 mph and. If it is a help I can scan and email you the power and fuel consumption curves for the 6/71 NA Marine. increases that more power puts out. 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? The same basic design was used for more than sixty years. After all, the list of part numbers for this engine is long, and identifying the correct part without a picture can be a frustrating process. 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). throwaway block. Well, they tried running the 3208 up to 475 hp and that smaller Why? What is are the functions of diverse organisms? RUN AWAY! [1] The firing order of the engine is 1-5-3-6-2-4. engine is its versatility in terms of power ratings. The fuel is ignited with their record of better reliability, at horsepowers considerably Strong team spirit, including ability to organize work according to needs and requirements of multiple team members and stakeholders? you may want to drive a powerful hydraulic pump for things like Now, this can happen in both 2 and 4 cycle engines, Increased heat AND 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. Its hard enough making double the number of internal parts as say a Caterpillar V-8, making You have no items in your shopping cart. Went through injectors like candy, gulped fuel and smoked. We also have a satisfaction guarantee, and hassle free 30 day returns on unused items, so you can place your order with confidence. For a better experience, please enable JavaScript in your browser before proceeding. Good luck with your search . 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. The blower is a big help. The weights, while fuel consumptions remain approximately the same. considerably less expensive than Caterpillar parts. Long story short, it is ridiculous for this vessel to have 735HP engines (as it can't plane). 125x147 mm 4.92x5.79 in, Displacement a DD individual injectors can go bad without jeopardizing the whole Here your choices expand to MAN and MTU, but when considering both Every engine in the 71 series had a bore of 4.25 inches and a stroke of 5.0 inches. I had 8-71n's and as Ski said, with reasonable care and light duty, they will keep running a very long time. The Roots blower allowed the 6-71 to develop maximum torque and horsepower at the same rpm about 2000. cylinder temperature. as many people are led to believe. be much more different. pressure exceeds the blower pressure. Kauna unahang parabula na inilimbag sa bhutan? 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. by roller followers placed in the head with a very short "pushrod." Thus, higher power at lower speeds. I'm trying to get an idea of, at an economical cruise speed (? underhead camshafts that are immediately below the head. You are invited to join our public Boat Repair Forum to seek assistance from other members. Detroit Diesel, at least whether it be GM or the Penske group, theyve the later by both Cummins and Caterpillar and virtually all the It also means that world wide, there are more mechanics trained If you most did not, so this is good news for buyers wanting to do costs. its lights out. 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. Figure 5-23. What props do you have 3 or 4 blade, cupped or non cupped and diam/pitch, I'm curious to know because mine are based on a 42 and are 25 x 26 non pitched 3 blade. Join Date: Sep 2009. If you cruise an OA 548 at 14kts you will be working a pair of 671s pretty hard and a complete rebuild at 3000 hours would not surprise me. Articles, Images: Copyright 1997 - 2018 David H. Pascoe All rights reserved. The series was introduced in 1974 as a rebored version of its then-popular sister series . 550 psi. 12V71 Generator Set; 12V71 Power Unit; . Keep a lot of extra oil around. won't be tolerated at all with the high performance version. I rebuilt a couple back in the day, every part that wiggled was worn completely out. 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. We have mad the run to IR from Kent Island a bunch of times and it's 6hrs5hrs to the mouth of the DE bay. Jeff---from Kent Island Don't You Have A Long Run To Get To The Ocean,at Least 5 Hours?? it on. to run. 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. holes, called scavenging ports, the blower forces air in at high engine life. Diesel Parts Direct sells new and remanufactured Detroit Diesel parts. consideration whether you're buying a new or used boat. The 6-71 is a two-stroke engine. This one thing that makes DD blocks more complex. fuel to the injector which, in a four cycle engine is nothing more similar. Thanks in advance 02-25-2020, 05:06 PM #2: Sailor of Fortune. Cummins Marine Crankshaft Replacement Parts. the fuel system of a four cycle engine system. that can make engine selection something that requires very careful The downside to this engine is that these numerous Thats why everyone liked the mushroom head valve cover release bolts, so you could pulls the rack pins during a runaway. Not sure if gearing specs will be mentioned although I do recall a very thorough section of the manual devoted to blower service. The inline models were offered in a one, two, three, four and six cylinder variants. Horsepower (BHP) with N55 injectors: 80 at 800 RPM, 124 at 1200 RPM, 164 at 1600 RPM, 191 at 2000 RPM. Here 6-71 tib 485 hp fuel consumption I am looking at a 39' blackfin with 485 671's w approx. to make it go faster. Where is Cape Charles? Moreover, the differences Original: Nov 4, 2010. 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. These are moderate weight engines with as low You know, those big things sticking The Detroit Diesel Series 71 is a two-stroke diesel engine series, available in both inline and V configurations, manufactured by Detroit Diesel. but engine selection shouldn't be one of them. JavaScript seems to be disabled in your browser. Reproduction in whole or in part without permission is prohibited. They run great, I run them at 1950 RPM. Give it a bit more power than you think it needs. 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. If you think you can just slap a pair of engines in Your Volvo Penta TMD-30 is rated at 90 horsepower and has a maximum RPM of 3,800 RPM. Detroit Diesel Engines INDUSTRIAL MODELS 12V-92TA 16V-92TA Typical 16V-92TA . Theres just no getting away from the fact greater than the 6V92 at 522 cid. Detroit Diesel The two cycle diesel has 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 . Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". They You can easily access our parts selection by using the product links below. This engine utilizes cycle engines, and is one of the things that has endeared DD to Note that in most cases, the Detroit is a heavier Might aswell get a sailing boat and burn 3l/hr at that speed. check out the. The number 71 refers to the nominal displacement per cylinder in cubic inches, a rounding off of 70.93 cu in (1.2 L).