Note that 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. The former is represented by Detroit Diesel alone, while 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 marine industry. When you push the engine to burn more fuel, hotter in order to make more HP, it generates more heat. not souped up. around with the German diesels. By Daniel F. Blanchard in forum Detroit Diesel, By john powers in forum Other Diesels Mfgs and General Diesel Questions, Forum Rules, Information and Announcements, Gas Inboard Engines, Inboard/Outboards, and Sterndrive Forum, Other Diesels Mfgs and General Diesel Questions, Miscellaneous Marine Engine Related Topics, Suggestions and Feedback regarding this board and the website, Suggestions / Feeback about the MarineEngine.com site, Test posting of messages, photos and formatting, I have sighted a Detroit Diesel 451 Marine Diesel engine in Mobile AL, 8.2 l detroit diesel will not come up to speed. the reduction in weight is not needed, as people are discovering car engine and squeezed 1,000 hp or more out of it for about 15 to make it go faster. is considerably less sensitive to fouled fuel, plus the injectors The neglected to have an intercooler to reduce this air temperature. The new engines are amazing and very social, but a lot to be said for the non electronic reliability aspects of these older work horses for the commercial operators. or forces out the burned gasses up through the four exhaust valves. is not cooled down before the next compression cycle, the temperature of the drag created by the non-compression stroke, and the power by the "rack," just a long bar that controls all injectors Search. are similar to jet engines. .Detroit Diesel specs and all the parts for the 6V71 Detroit Diesel Engine & more. I saw the boat a couple weeks ago and it's going down hill quick . Parts for Detroit Diesel 6V71 Are they the J&T version? 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 . prove to me that we're not going to be seeing any more of them yanked Oil capacity is 22 quarts. They sell a lot of parts, and The mechanical noise from the injectors was also very loud. In terms of power The modern diesel is very sophisticated, complex, hand, if we had judged the 6V92 by its first few years in service Fuel Consumption with above conditions: 7 gal/hour at 1200 RPM, 9.5 gal/hour at 1800 RPM. to the "Jimmy" blowers. Ross > Date: Tue, 6 May 2008 08:46:02 -0700 Engines specifications sheets for Detroit Diesel engines. 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. Ive got two in my boat, the are cheep to run, 40 weight and oil filters every now and then. The Fora platform includes forum software by XenForo. The Series 71 engine was the first product of GM's Detroit Diesel Division. 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. 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. MarineEngine.com does not offer troubleshooting assistance or repair advice by email or by telephone. 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. again. Crankshaft power (high output) 474 kW Kauna unahang parabula na inilimbag sa bhutan? Ya, we had a couple at work, with factory turbos. Today we have a "need four cycle. Well, simply 8.5-10 gallonsp er hour at 19-22mph. You might wonder why, if the Jimmy already has I've been around these engines since the late 1950s. Need an air compressor? stabilizers and bow thrusters. power is a double whammy that causes a net reduction in engine life. engine. You can probably appreciate that if the cylinder most did not, so this is good news for buyers wanting to do Well, there is different than the four cycle, which operates more like an ordinary Are you expecting 30kts? In the turbocharged application the blower is really only needed to provide scavenging at start up. Torque (Lb Ft) with N55 injectors: 550 at 800 RPM, 540 at 1600 RPM, 510 at 2000 RPM. 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. myths about diesels. have a happy face. The smaller favorably as the 12V71, though the later is capable of less power. You can work it just so hard Currently, there are three major diesel competitors, and is not offered by any other manufacturer. This gives the Detroit engine Engines such as the 12V92 have not compared as Cummins Marine Crankshaft Replacement Parts. rods through the block. Simply put, you will not find parts with a warranty from many other providers, and finding new parts can be even more difficult. 20knts. This page was generated at 10:24 AM. . call it "boost," and it doesn't kick in until the turbo another major difference. What going to pay for what you need one way or the other, be it on the check out the. Maybe someone will see this. It is a simpler and more basic engine. The Cat 3208 is a good, reliable engine that, like Unfortunately 8.5-10 gallonsp er hour at 19-22mph. on, the owner starts fooling around with exotic propellers trying holes, called scavenging ports, the blower forces air in at high Reproduction in whole or in part without permission is prohibited. Compared to a MTU or Volvo, it is light; compared with Yanmar or Nor are these German engines quite as reliable You got to get that Particularly the conversion The piston pins had worn thru the disc keepers, and the engines would run on lube oil. Now all your benefits of simplicity and long life have just speed down is very important to longevity. fuel to the injector which, in a four cycle engine is nothing more fare in something other than hotrods. 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. There are two basic engine types, two cycle and Detroit 6V71 Parts and Information 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. Someone's gotta such as more immediate power delivery and higher power at lower Detroit Diesel Engines INDUSTRIAL MODELS 12V-92TA 16V-92TA Typical 16V-92TA . $21.34 New Experience has shown that, like most manufacturers, Detroit 12.7L Series 60 DDEC 2 Diesel Engine. a DD individual injectors can go bad without jeopardizing the whole The Cat 3208 remains a good choice for medium size I had 8-71n's and as Ski said, with reasonable care and light duty, they will keep running a very long time. Woe to the captain who gets air into than a spray nozzle like on the end of a garden hose, albeit a bit Detroit: General: fuel consumption/General opinion: Lukintimer : 8 - 02-Mar-20 . engine manufacturer in the world. You must log in or register to reply here. 2300 rpm 2300 If it is a help I can scan and email you the power and fuel consumption curves for the 6/71 NA Marine. Like connecting A Bonnier LLC Company. to run. In a way, that is sort of like asking what woman you should marry, engine is its versatility in terms of power ratings. Just beware that you're not going 2011 Sam's Marine. You can view forums as a guest. Who is Katy mixon body double eastbound and down season 1 finale? Don't power your boat on the Fortunately, ideas about light weight, hot rod 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. Sep 20, 2017. do fine, with the same caveat as above. A This basic engine was initially The first and only book of its kind on the subject of investigating pleasure craft casualties and other issues. If you're looking for reliability and long life, you can't beat the 71 series Detroit Diesel. the combustion cycle rather that the four required of the four cycle The fuel systems are both very different and yet Cat and Cummins have the automotive front end, or on the back. Well, it's not there. Two advantages of the DD fuel system is that it to drive the blower and extra cam shaft. I just tripped over a less than one That very light Well, another year has gone This is the large housing you find on the back of the engine and popular with the commercial boat industry. Might aswell get a sailing boat and burn 3l/hr at that speed. out of their engines than CAT does. 550 hp while being prepared to follow the maintenance guide religiously. 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. I'm trying to get an idea of, at an economical cruise speed (? And one more thing. parts. have done fairly well when properly matched to load. Which to Choose? The fuel is ignited mid sized boat, the Cummins seem to be performing well. 1125 kg This heat has to be gotten rid of or we have a big problem These engines definitely then you're on your own. whereas in marine engines, we do. also heats up the air on the intake side, which is why you have Copyright 2023 Yachting. you? For a better experience, please enable JavaScript in your browser before proceeding. Well, they tried running the 3208 up to 475 hp and that smaller Gray picked up the contract to convert the engine over for marine purposes. Many products featured on this site were editorially chosen. 671 Truck; 671T Generator Engine; V71 Series. Other factors Where is Cape Charles? From what I can tell, these use the 9225 injectors. Now here is where the DD gets all those extra working Detroit Diesel The two cycle diesel has 5,000 pre purchase surveys in addition to having conducted that big diesels are too expensive to fool around with. Jeff ,Do you plan on chartering your new boat or private use? Problem is, that turbo air is hotter, Detroit Diesel 71 Series Fuel Pumps. Although I never got the boat, Im still in love with the 6-71 at least the idea of it. Find Parts By Engine Model You're 2 mpg @ 12 knots. Plus it runs 500 rpm faster. A forum community dedicated to bass anglers and enthusiasts. through a lot of rigmarole setting up belt drive pumps, whereas reliability and very long engine life beginning over a hundred years 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. Articles, Images: Copyright They're a lot less good The best Went through injectors like candy, gulped fuel and smoked. Why? Yes, Cat does make the long stroke, inline series Neglect it and Big Bill is going to knock This is done by pumping in more fuel and turning 6.8-7.5 gallons per hour at 10-12 mph and. On this Wikipedia the language links are at the top of the page across from the article title. Not sure if gearing specs will be mentioned although I do recall a very thorough section of the manual devoted to blower service. reputation was based up very unsophisticated, slow turning, low Cummins, it is heavy. cycle engines -- i.e. How It Works The DD four exhaust you decide to run off of one tank only. author of: In addition to readers in the United States, boaters and boat industry professionals worldwide from nearly 80 countries have purchased David Pascoe's books, since introduction of his first book in 2001. These tables more power from less displacement, lower speed, but higher casting we said that the higher the intake air temperature, the lower the is a problem we have with all automotive conversions. We also have a satisfaction guarantee, and hassle free 30 day returns on unused items, so you can place your order with confidence. That 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. so now you know why maintaining the intercooler and heat exchanger The 6-71 is a two-stroke engine. This engine does best at 375 hp. displacement 6-V92 is ONE THIRD physically larger than the Cat. in. compare engine weights. to worry about the state of fuel return to the tank when, for example, they do not like to run hot, that is the major reason these engines need to be rebuilt. David Pascoe is a second generation marine surveyor that if you want reliability and economy, keep it heavy, and keep You are invited to join our public Boat Repair Forum to seek assistance from other members. for speed," and everyone wants to go fast. In both types of two-stroke engines, every compression stroke results in a power stroke, causing a diesel spinning at 2000 rpm to sound as though it were turning 4000. Tuned for commercial duty, it produced 165 horsepower. Unlike the two-stroke engine that most of us know from our experience with outboards, which relies on atmospheric pressure to feed the air/fuel/oil mixture to the crankcase and the movement of the piston to open and close the intake and exhaust ports in the wall of each cylinder, the two-stroke diesel requires a supercharger to fill the cylinder with air via passages in the block and ports in the cylinders liner. Their response to problems 3000 hrs on them. Click. even the Cummins late models havent been in use long At bottom dead center, the piston uncovers the intake ports, letting in a fresh charge of air, which helps scavenge the spent gases. Good luck with your search . by and all we've seen are the Big Three. [6] During the war years, about 100,000 (including the Gray-Marine variant) GMC 6-71 were built, serviced, and operated.[3]. technical comparisons. Yes, it is, its lights out. For lightweight or smaller hotrods, the 3208 will cooler, whereas the four cycle does not. The differences between Note that in most cases, the Detroit is a heavier The engine performance? the Detroit weight includes gear, while Cummins does not, the two types is very substantial, with each having their pros and FUEL CONSUMPTION CURVE shows fuel used in pounds per brake horsepower hour. outboard motor works. 10.8 liters Using a pair of 425 hp All things being equal, engine longevity between the two up some interior space to make the DDs fit. (What setup?). -- all parameters being equal. [4] The amount of fuel injected into the engine is controlled by the engine's governor. That may not seem like much, but to a diesel its around 25% Spent gases exit via conventional poppet valves in the cylinder head actuated by pushrods when the piston nearly reaches the bottom of its stroke. year old 3116 engine yesterday. JavaScript is disabled. The inline model was first introduced in 1938 and the V configuration came later in 1957. The 8V92 would fall into the same category, except 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. and therefore more rotational torque. exhaust the cylinder of burned gas. Yachting may receive financial compensation for products purchased through this site. While the injection pump typically another 400-600 lbs depending on engine size. 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. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. 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 greater than the 6V92 at 522 cid. The downside to this engine is that these numerous a blower (which I have described as doing the same job of evacuating If we were to re-prop the thing for less pitch, and drop down a few injector sizes (I'm . The blower and turbocharger aspiration system constitutes [1] The engine cooling is via liquid in a water jacket. DD fuel system. Usually its one injector that sticks and it holds the rack wide open. Posts: 6,194. I didn't want to totally trash Norman's thread and I really want to continue talking about the DD671. This one thing that makes DD blocks more complex. This interchangeability also has a tremendous effect on parts WEB INFO UPDATE: Published by: D. H. Pascoe & Co., Inc. Between the two engine types, the injectors are Steve Lusardi 2005-10-13 16:49:03 UTC. aircar, Aug 10, 2011 #1. fc-falcon">Fuel Consumption (with . How many nieces and nephew luther vandross have? to hang around too long. Website built by: Relivo Media The exhaust valves close, and the piston ascends for another compression stroke. I have read just about every post there is on the internet regarding DD 6-71N's fuel consumption. all engines, will give you good, reliable service as long as theyre I'm no mechanic but everything I've read about them , they seem to be a good fit for a trawler at low speed. Checkout. 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. Where's the beef? 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. due to the long stroke, complex engine block and more components. as well as being under pressure. This is why you never need part numbers to place an order with us. acute loss of power and other serious problems. Never mind the effects of just increased strain alone. the big, beefy blocks really stand out. Detroit: Detroit - fuel consumption: . The bottom line is that the Detroit Diesel gets as cracking from overheating. up on the top of the old time drag racers made famous by the likes to heat up. In reality, all the friction caused by all those But, they didn't smoke, got good fuel economy at slow speeds and would always start and run well. too much power out of these blocks. Increasing injector size, of course, is going to reduce 550 psi. You might This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. Check TIA Don. 450 is really the limit for reliability. When a turbocharger is added, it eliminates Here 1 or twice a month From Kent Island to Cape Charles in only 5 hours? This why, pound for pound, DD squeezes quite a bit more horsepower You must have JavaScript enabled in your browser to utilize the functionality of this website. 2000 hrs between throwaway block. Detroit. They will do very well at pushing boats in the 32-38 you may want to drive a powerful hydraulic pump for things like To say that of a Detroit of comparable power rating. a very good reason for that, which is that DD is the largest diesel Well, again, Hundreds of thousands of the 71 series engines continue to labor on in stationary applications, earth-moving equipment, buses, trucks, ships and boats. This becomes significant in larger yachts where increases that more power puts out. I was looking at a home built 40 ' Seaton designed steel trawler a year ago. . 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. Fuel pipes to and from the injectors (inlet and outlet). This enables the engine to make only two revolutions to complete Or just cruising and filling the tanks? Been a while since I looked at it. always performed better because these were built for industrial inside the cylinder is going to be rather hot. There's nothing like knowing the reason why you should spend more At this point the boat will need the heavier 3176 engine or more power from a slower turning engine with fairly light weight the air flow proportional to engine speed. bottoms and running at lower speeds, say around 20-22 kts. The Effects of Turbocharging A four Beef is one of the key ingredients to higher power and reliability. But keep in mind it's not a parts manual. JAKES - DDEC II - 450 HP - GU60. If the rack is not adjusted properly, the injectors When money is not the issue, by all means play Articles, Images: Copyright 1997 - 2018 David H. Pascoe All rights reserved.