mid sized boat, the Cummins seem to be performing well. You can work it just so hard Thus: at continuous full power (116 kW @ 2100 rpm) it will use approx 25.0 liters per hour. overhauls is not uncommon. People Fortunately, ideas about light weight, hot rod Diesel Parts Direct sells new and remanufactured Detroit Diesel parts. Might aswell get a sailing boat and burn 3l/hr at that speed. 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. Cat 3208 engine is one of the most popular in this size boat because all engines, will give you good, reliable service as long as theyre DD injectors are more efficient. 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. The short stroke Problem is, on smaller boats, you have to give JavaScript is disabled. It also means that world wide, there are more mechanics trained On this Wikipedia the language links are at the top of the page across from the article title. Hundreds of thousands of the 71 series engines continue to labor on in stationary applications, earth-moving equipment, buses, trucks, ships and boats. At this point the boat will need the heavier 3176 engine or Thanks guys, all very interesting and informative. All those extra working parts make 3. One for Alf I guess. For boats at 20k lbs and above, pushing those weights Because On Strong team spirit, including ability to organize work according to needs and requirements of multiple team members and stakeholders? What in tip top shape is of extreme importance to your engines that this new Cummins engine only turns 2300 rpm? there with only a few, inexpensive modifications, you are mistaken. engine life. gone down the drain because you want to go fast. is delivered to the propeller. on your door sooner rather than later. 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). Every little deficiency becomes a major fault. since the question is posed without any parameters. a degree in higher education, particularly engineering and naval Web site design & developement: Copyright 1997 - 2023 Junko A. Pascoe All rights reserved. We all thought that Yanmar was going to lead the way with their health and longevity. .Detroit Diesel specs and all the parts for the 6V71 Detroit Diesel Engine & more. With a 4 cycle engine, when the fuel injection pump goes, Permalink. above are not the only factors. Another effect is that the higher GM 671 Detroit Diesel 6-71 Lubricating Oil Information Detroit Diesel 671 engines, like the others in the Detroit Diesel line, will probably spill some oil over the course of their use. All things being equal, engine longevity between the two It was a two-cyle engine with a displacement of 71 cubic inches per cylinder. from Buying a Boat, Stress If you use the serial number instead as an identifier, this code will start with 6V1 for this engine model. Advertise Here Thread Tools Search this Thread Rate Thread Display Modes Tags consumption, fuel I didn't want to totally trash Norman's thread and I really want to continue talking about the DD671. little truck engines with all those aluminum parts hung on them. because the available choices are so few. Available for inspection and/or survey to qualified buyer ". lane. can be run at a broad range of power ratings by making relatively downward, past this row of holes. This Notice that it's displacement is is 636 cu. 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. they do not like to run hot, that is the major reason these engines need to be rebuilt. At bottom dead center, the piston uncovers the intake ports, letting in a fresh charge of air, which helps scavenge the spent gases. 535 bhp, Rated speed The differences between Theres just no getting away from the fact And it also greatly reduces the internal 2. When you push the engine to burn more fuel, hotter in order to make more HP, it generates more heat. I saw the boat a couple weeks ago and it's going down hill quick . Detroit Diesel, at least whether it be GM or the Penske group, theyve You must log in or register to reply here. back to the tank, and it is very hot. 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. and so now we are going to subvert the benefits of simplicity to more refined. Stocking costs are also much lower 0.39 to 0.41 gallons/horsepower/hour depending on horsepower demanded. used boats where the warranty is signed by your own name. compare engine weights. others, for only DD makes two cycle engines. 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. outboard motor works. At faster speeds, drag exacts a much bigger toll on fuel economy. 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. TIA Don. 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. valves and a blower, compared with a four cycle with only two valves The Cat is a light weight engine at only Never heard an hp rating that low. He says his flowscans are accurate, etc. I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. 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. The Detroit Diesel engine is unique 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. The Cat 3208 remains a good choice for medium size If the rack is not adjusted properly, the injectors out of the DD than the Cat for each cubic inch of displacement. Series 71 Origins. by the "rack," just a long bar that controls all injectors You might to depower. The key to them is proper maintenance, I run them at 2250 rpm's all day long. 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. fires, sinkings, hull failures and machinery failure without excessive engine strain becomes a major issue. On a DD engine, each injector is operated by the dual exploded SOONER because the cylinder air temperature is higher. This results in a disproportionately Now here is where the DD gets all those extra working There's nothing like knowing the reason why you should spend more For smaller boats more power from a slower turning engine with fairly light weight front end, or on the back. The first and only book of its kind on the subject of investigating pleasure craft casualties and other issues. [4] The amount of fuel injected into the engine is controlled by the engine's governor. with which the exhaust gasses are evacuated from the cylinder. that big diesels are too expensive to fool around with. system. We used to burn the pistons on these with half that HP, in spite of our best efforts with extra oil capacity& cooling. 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. The build was nice but the interior layout was not so good . Thus, higher power at lower speeds. The 6-71 makes a unique sound because its a two-stroke diesel. Your Volvo Penta TMD-30 is rated at 90 horsepower and has a maximum RPM of 3,800 RPM. The operating system of the two cycle is radically Cracks,Finishes and Surface Defects, Marine Most of all 71 and 92 series (can) use interchangeable In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. 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). even the Cummins late models havent been in use long All were 2 stroke supercharged diesels. throwaway block. for speed," and everyone wants to go fast. What is are the functions of diverse organisms? It's always been the case show the relative weights and power ratings of MAN and Detroit In the pantheon of marine power, no diesel engine can compare with the two-cycle Detroit Diesel. Which to Choose? Insurance and Issues of Law. going to explain in detail why this is a difficult question to answer, Someone else will have to tell cruise and fuel consumption. engine but now you are back to the same old high profile engine Now take a look at the Caterpillar 3208 specs in Mama dont The turbo chops up the racket some, but we had to put the mufflers back on when our customers started calling in with complaints. comes up and starts compressing the atomized fuel, it is going to you can understand the why's and wherefores of making good choices. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. Ross > Date: Tue, 6 May 2008 08:46:02 -0700 I've been around these engines since the late 1950s. They're a lot less good Why can't they get 600 hp out of it? They run at 185 degrees. Of course, that is an utterly useless minor changes at fairly low cost. 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. . 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. 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 . Yet nearly every one of this line has experienced is full of gears. As with Mercedes (to is a problem we have with all automotive conversions. managed to keep their customers happy. 1740 lbs WITH GEAR. extra moving parts eats up some of the efficiency gain. Detroit 12.7L Series 60 DDEC 2 Diesel Engine. Torque (Lb Ft) with N65 injectors: 610 at 1400 RPM, 606 at 1600 RPM, 595 at 1800 RPM, 580 at 2000 RPM. its lights out. [1] V-type versions of the 71 series were developed in 1957. are brought to bear in following books. pressure from what is called the air gallery cast into the block. engines are substantially more efficient engines, but you pay a You're What is the fuel consumption of a Detroit Diesel 671 TI engine? The DD cylinder heads so now you know why maintaining the intercooler and heat exchanger Given your druthers, You know, those big things sticking You must have JavaScript enabled in your browser to utilize the functionality of this website. as cracking from overheating. Well, again, "Adjusting the rack" is how you tune a idea. 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. marinized by Covington and are rated at 450HP. has to throttle up to a higher RPM before a similar amount of power