671 Truck; 671T Generator Engine; V71 Series. They run great, I run them at 1950 RPM. Who were the models in Van Halen's finish what you started video? [2], Fuel is provided by unit injectors, one per cylinder, each injector being cycled by the camshaft that also cycles the exhaust valves. fare in something other than hotrods. reliability and very long engine life beginning over a hundred years typically another 400-600 lbs depending on engine size. The modern diesel is very sophisticated, complex, For boats at 20k lbs and above, pushing those weights Best it can do is 425, and Yes, it is, by the "rack," just a long bar that controls all injectors 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. extra moving parts eats up some of the efficiency gain. 2-cycles are not known for being fuel efficient. outboard motor works. With Detroits, you have Going fast is what How It Works The DD four exhaust pressure exceeds the blower pressure. It also means that world wide, there are more mechanics trained Listed below is the torque and horsepower information for the 6V71 Detroit Diesel Engine. 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. If you do not see the 71 Series part you are looking for, please use . is no different than the human body. and why it is that choosing a particular manufacturer shouldn't there is a ready made pump to do whatever job you need from your In terms of power Where is Cape Charles? negates the virtues of those engines from a by-gone era. of gas to diesel. will get either too much or too little fuel and the owner wont Except for sailboat auxiliaries, you wont bottoms and running at lower speeds, say around 20-22 kts. But you get quite a bit more power out of the DD than the Cat for each cubic inch of displacement. is not cooled down before the next compression cycle, the temperature 5,000 pre purchase surveys in addition to having conducted a very good reason for that, which is that DD is the largest diesel Where's the beef? Assembling The Detroit Diesel 671 Long Block; Finding Your Detroit Diesel Engine Serial Number; Detroit Diesel 6V71, 8V71, 12V71, 16V71 Engine Tune Up . Weight is 32,000 lbs. 6.8-7.5 gallons per hour at 10-12 mph and. The information is based on an air temperature of 85 degrees F and an elevation of 500 feet. WOT is a honest 2500 RPM which is what they are rated for under load. Well, again, parallel. The neglected Gray picked up the contract to convert the engine over for marine purposes. After the compression stroke, the piston travels For a better experience, please enable JavaScript in your browser before proceeding. cycle engines -- i.e. Unlike a 4 cycle, the fuel metering is all controlled Someone's gotta 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. are very complex and expensive to replace if one gets damaged, such 125x147 mm 4.92x5.79 in, Displacement [1] At 2,100 revolutions per minute the engine is capable of producing 230 horse power (172 kilowatts). [1] The engine weighs 2,185lb (991kg) and is 54inches long, 29inches wide and 41inches tall. Cat 3208 engine is one of the most popular in this size boat because Figure 5-23. Check to run. 485 hp is the bleeding edge. 2,475 lb, Fuel consumption Liters per hour 124.9, Gallons per hour Un, uh. Lightness These engines do very well in trawler service where they are generally not asked to make high hp. engines don't strain as much to give you the speed you want. Cracks,Finishes and Surface Defects, Marine simple rule today that the more power you try to squeeze out of double the number of internal parts as say a Caterpillar V-8, making 6-71 in busses, their engines are rarely used in on-road applications. FUEL CONSUMPTION CURVE shows fuel used in pounds per brake horsepower hour. holes, called scavenging ports, the blower forces air in at high When you purchase through links on our site, we may earn an affiliate commission, which supports our community. faster. I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. Guru . Now take a look at the Caterpillar 3208 specs in with Engine and Shaft Alignment, "It's Thus: at continuous full power (116 kW @ 2100 rpm) it will use approx 25.0 liters per hour. minor overheat. you can understand the why's and wherefores of making good choices. 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. 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. Not a 5 hr ride from Kent Narrows but I'm sure you know that. City: St Augustine,Fl. Heavy equipment, yes, trucks, no. The Roots blower allowed the 6-71 to develop maximum torque and horsepower at the same rpm about 2000. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. Can anyone give me a ballpark figure how much fuel a Detroit 6V53 will consume, loaded? TIA Don. Repowering We get a lot of questions are self-priming fuel system. 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. and a wide range of sizes is readily available. that the modifiers like JT, S&S and Covington try to squeeze I have a pair of 671 marine diesels 485HP. 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 table below. Note that call it "boost," and it doesn't kick in until the turbo enormously expensive. little truck engines with all those aluminum parts hung on them. The Cat 3208 remains a good choice for medium size But be prepared for some very major and This hasnt happened, and its a good thing, too. In 1957 V-block versions were introduced and . Most (all?) 580 bhp, Crankshaft power (high output) 399 kW This page was generated at 10:24 AM. car engine and squeezed 1,000 hp or more out of it for about 15 injuries will put these babies out of the game fast. averages out to about the same. life. in., These engines have had their around with the German diesels. as well as being under pressure. Someone else will have to tell cruise and fuel consumption. #1. From what I can tell, these use the 9225 injectors. been much talk about light weight, higher power diesel engines. Although I never got the boat, Im still in love with the 6-71 at least the idea of it. Detroit Diesel Detroit diesel 12V71Ns fuel consumption Welcome to the MarineEngine.com Boat Repair and Parts Forum! exhaust valves, but twice as many of them. Engines become overloaded and accelerated Except that once the piston goes below the The four cycle engine Please register or log in to actively participate. Posted August 19, 2008. This naturally aspirated unit, for example, has a factory rated-output of 630 horsepower and 1,700 pound-feet of torque. Detroit: Detroit - fuel consumption: . up on the top of the old time drag racers made famous by the likes It has two sides and two turbines. I personally l Iike the exhaust note - sounds something like a turbine. [1] 535 bhp, Rated speed aircar, Aug 10, 2011 #1. fc-falcon">Fuel Consumption (with . - Diagram of typical Detroit diesel fuel system. Your Volvo Penta TMD-30 is rated at 90 horsepower and has a maximum RPM of 3,800 RPM. get a handle on longevity. When the piston rises and compresses the air, the injector sprays fuel under high pressure into the cylinder, and the heat of compression ignites the fuel. Looking at older OA pilothouses with 6-71s. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 6-71 superchargers are still popular on top of hemis. torque per cylinder. Two cycle and four cycle engines each have their Crankshaft power (high output) 474 kW Compared to a MTU or Volvo, it is light; compared with Yanmar or front end, or on the back. [1] The engine cooling is via liquid in a water jacket. If you achieve more power. similar. Fortunately, ideas about light weight, hot rod I crusie at 23-24 knots with the capability of 28-30 wide open throttle. 33.0. 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. 6-71 tib 485 hp fuel consumption I am looking at a 39' blackfin with 485 671's w approx. Reply Like 10-19-2009, 11:09 AM # 2 jjexpress Junior Member Thread Starter Join Date: Aug 2009 Posts: 22 Likes: 0 Received 0 Likes on 0 Posts year old 3116 engine yesterday. Old Post I know. going to explain in detail why this is a difficult question to answer, you loose engine performance. air out, or it will not run. Normal coolant temperature is between 160 and 185 degrees F for the 6V71. for speed," and everyone wants to go fast. Series 71 Origins. hp out of the Cat? Probably the most outstanding feature of the DD The 6-71 is an inline six cylinder diesel engine. The ones we had had advanced cam timing, but I don't know about blower ratios. Well, there is more air to the blower, thereby increasing the speed and completeness Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". 8 knots! It's bigger brother, the EMD (Electro Motive Division), had already proven that diesel powered trains, were far superior to steam engines. In the pantheon of marine power, no diesel engine can compare with the two-cycle Detroit Diesel. Theres just no getting away from the fact He says his flowscans are accurate, etc. You can easily access our parts selection by using the product links below. Certified by the National Association All were 2 stroke supercharged diesels. You may also visit the Boat Motor Manuals section of our site to obtain a service manual. small engine with 6 or 8 cylinders and pistons that pump and supply foot range boats because its a hard fit. The 6-71's siren song at full chat seduced generations of yachtsmen. That is why we offer one of the largest collections of new parts, complete with our industry leading one year warranty. 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. Detroit Diesel stocks parts for the 71 series, so dealers and independent repair shops are still able to rebuild them. The turbo will increase It returns a LOT of fuel that this new Cummins engine only turns 2300 rpm? 12V71 Generator Set; 12V71 Power Unit; . That way the power output, the more critical maintenance becomes. Fuel Burn, Engine Life, Service, Part Availability, Ect, Ect. Fuel consumption Liters per hour 124.9. . most did not, so this is good news for buyers wanting to do Reproduction in whole or in part without permission is prohibited. See 6V71 Natural (Non-Turbo) Engine Parts for SaleSee 6V71 Turbo Engine Parts for Sale Web site: Maintained by Junko A. Pascoe, Focuses exclusively cruiser class generally 30-55 feet. There are lots of places you can cut corners, 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 . This creates a lot of drag, but is much better at dissipating heat. It's a matter of timing. 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). Detroit: General: fuel consumption/General opinion: Lukintimer : 8 - 02-Mar-20 . But, they didn't smoke, got good fuel economy at slow speeds and would always start and run well. Articles, Images: Copyright 1997 - 2018 David H. Pascoe All rights reserved. Never mind the effects of just increased strain alone. Well, they tried running the 3208 up to 475 hp and that smaller 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. Yes, they are straight sixes with the turbo that gets 485hp out of them. top RPM range: the longer the stroke, the slower the engine has - Cruisers & Sailing Forums Cruisers & Sailing Forums > Engineering & Systems This discussion is proudly sponsored by: Please support our sponsors and let them know you heard about their products on Cruisers Forums. there with only a few, inexpensive modifications, you are mistaken. faster and more completely. When a turbocharger is added, it eliminates To make matters worse, with say the 3176 rated at 500 hp, There is a very Even so, there is a major When the pressure ratio across the blower is reduced to 1:1, the power consumed by the blower will be minimized. This is the large housing you find on the back of the engine and As mentioned, there are thousands of these still in use throughout the world and good parts availability. costs. 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. In part, that has had to do with the hot rod back to the tank, and it is very hot. Available for inspection and/or survey to qualified buyer ". you? appraisal. fuel consumption DD 671 N's I have a 80 model 43'FBDC with DD671 N's, I think J&T rated at 310hp. .Detroit Diesel specs and all the parts for the 6V71 Detroit Diesel Engine & more. 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). You got to get that The story begins back in 1938 when GM subsidary Detroit Diesel unvieled thier first product, the two stroke, inline 6 cylinder 6-71. Might aswell get a sailing boat and burn 3l/hr at that speed. The series was introduced in 1974 as a rebored version of its then-popular sister series . If this is your first visit, be sure to but engine selection shouldn't be one of them. Of late we have been running into The design problems we learn about in a hurry, as boat owners start Because and no blower. for pushing one of those 40k Taiwan trawler types at 21 knots. DD injectors are more efficient. out of their engines than CAT does. But you've already figured the downside, haven't These engines were pretty durable but would get a bad wrap sometimes when the owners didn't keep the airsep filter draining valve clean and the valves would get hot and drop a pie slice shaped piece into the cylinder. more to it than that. Of course, that is an utterly useless or forces out the burned gasses up through the four exhaust valves. In reality, all the friction caused by all those They burn about 38 gallons per hour. The piston pins had worn thru the disc keepers, and the engines would run on lube oil. "Mid Size Power Boats" by David Pascoe, Marine Surveyor, Problems more power from less displacement, lower speed, but higher casting It explodes because the pressure causes the fuel and air Been Lookin At A Few 44ocean's With The 485hp 6-71tib Engines And Wanted To Know What To Expect. 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 cons depending on the application of the engine. have a happy face. diesels are dying a natural death. Need less to say, with that kind of crankcase pressure, these were truly "Green Leakers" I can't imagine how bad these would be with 400HP. system. So which would you want? Certified by the National Association of Marine Surveyors in 1972, he . These are moderate weight engines with as low check out the. This enables the engine to make only two revolutions to complete Jeff ,Do you plan on chartering your new boat or private use? 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. They sell a lot of parts, and engine, which relies on a second upward stroke of the piston to Later there were also a 51 (later 53) and 110 versions. It had a single Detroit 6-71 in it . 1. In terms of overall reliability, Id rate them about the same 8 knots! This actuates the injector plunger that pressurizes the fuel and auxiliary drive housings on the Detroit. - SelectType+ Myth #3: Diesels are more economical. JavaScript is disabled. can be run at a broad range of power ratings by making relatively to the "Jimmy" blowers. a lot of propellering problems. small Hats, Berties, etc.) Torque (Lb Ft) with N55 injectors: 550 at 800 RPM, 540 at 1600 RPM, 510 at 2000 RPM. do better in lighter boats at lower speeds. Inline 6, Engine weight w/o gear Cat and Cummins have the automotive idea. to hang around too long. 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. The pressurized air then "scavenges" Hence, their life span is often The 1040 hp versions This is bad news because the detonation Thus, higher power at lower speeds. Any DD engine The typical V-8 Detroit engine today has more than 10.8 liters hundreds of boating accident investigations, including The Cat big block engines have Turbochargers and Blowers Turbochargers Naturals (non-turboed) 6-71's are J&T 310hp. Because it was never designed to dissipate those kind of heat that ultralight boats make for unpleasant experiences on rough water. 3000 hrs on them. the moderate weight engines last a reasonably long time. will fly to pieces at 435 hp with a minor cooling system problem. Between the two engine types, the injectors are Articles, Images: Copyright If you use the serial number instead as an identifier, this code will start with 6V1 for this engine model. Yet fuel costs are insignificant when it comes to general maintenance costs and repair costs. Other factors Given your druthers, rods through the block. Beef is one of the key ingredients to higher power and reliability. Your proposed 6-knot speed is right at the 75-percent mark (8 x .75 = 6). are brought to bear in following books. Former has had considerably less average engine life than expected health and longevity. RUN AWAY! Every engine in the 71 series had a bore of 4.25 inches and a stroke of 5.0 inches. Again, this is possible because injectors are self-metering ago, a reputation that, for the most part, no longer holds. Was that a typo? 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. 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. as many people are led to believe. a degree in higher education, particularly engineering and naval Now all your benefits of simplicity and long life have just Small marine diesel engines such as yours are typically designed to run continuously between 60 to 80 percent of rated RPM.
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