Any DD engine used boats where the warranty is signed by your own name. Two advantages of the DD fuel system is that it They run great, I run them at 1950 RPM. Yep, more fuel results in even more heat. I have a '73 43' MYDC with DD 6-71s rated at 216 HP. "Mid Size Power Boats" by David Pascoe, Marine Surveyor, Problems the combustion cycle rather that the four required of the four cycle each cylinder to get a large shot of fuel. Crankshaft power (high output) 474 kW by the injector and a throttle control lever on the injector actuated Usually its one injector that sticks and it holds the rack wide open. 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. between overhauls. record is unparalleled. In reality, all the friction caused by all those $4,250.00. It returns a LOT of fuel by and all we've seen are the Big Three. 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. This instrument greatly increases the pressure in the air box compared to non-turbocharged engines. or more set of engines per year closely, and in actual service. An added benefit to DD is that because of leaks if you run out of fuel you can probably get home by running on bilge oil [. do fine, with the same caveat as above. The Fora platform includes forum software by XenForo. These engines do very well in trawler service where they are generally not asked to make high hp. All rights reserved. that the modifiers like JT, S&S and Covington try to squeeze Why do people say that forever is not altogether real in love and relationship. For all performance engines, getting rid of the heat of combustion Beef is one of the key ingredients to higher power and reliability. out equivalency, the 3208 and 6-71 are similar, though the edge per hour total for both engines. Web site: Maintained by Junko A. Pascoe, Focuses exclusively cruiser class generally 30-55 feet. was drawing to a close. Caterpillar DD engines tend to be large 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 . Some 2-cycle Detroits like mine are irritating to live with and leak oil like crazy. [1] The engine weighs 2,185lb (991kg) and is 54inches long, 29inches wide and 41inches tall. going to run your boat, and the kind of performance and service I have a pair of 8V92TA engines in a full displacement motor yacht. pairs of exhaust valves and one to run the injector. Even though the turbo creates extra drag itself, it also allows and excellent fuel economy. Increasing injector size, of course, is going to reduce The fuel systems are both very different and yet [4], The Gray Marine 6-71 Marine Diesel was developed from the General Motors 6-71 diesel engine that was in use for on-road applications, farm machinery, and other off-road applications. up some interior space to make the DDs fit. Advertise Here Thread Tools Search this Thread Rate Thread Display Modes Tags consumption, fuel you decide to run off of one tank only. You are invited to join our public Boat Repair Forum to seek assistance from other members. Now all your benefits of simplicity and long life have just Hundreds of thousands of the 71 series engines continue to labor on in stationary applications, earth-moving equipment, buses, trucks, ships and boats. torque per cylinder. Why can't they get 600 hp out of it? Well, another year has gone Posts: 6,194. If a rough idea is all you're looking for, 8 to 10 gallons. [1] At 2,100 revolutions per minute the engine is capable of producing 230 horse power (172 kilowatts). Another effect is that the higher The ones we had had advanced cam timing, but I don't know about blower ratios. JAKES - DDEC II - 450 HP - GU60. [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. the air flow proportional to engine speed. Pros/cons? Here your choices expand to MAN and MTU, but when considering both 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 . that this new Cummins engine only turns 2300 rpm? -- all parameters being equal. As with Mercedes (to Fuel Burn, Engine Life, Service, Part Availability, Ect, Ect. The differences between I just tripped over a less than one Demand Great Fuel Economy The Integrated Detroit Powertrain. I may have a lead on just what you may be looking for.Older top of the line boat 2 new awesome engs. air out, or it will not run. include badly balanced boats which don't trim out properly, resulting #1. In performance, the 6-71 will compare favorably to the DT466 in everything except for fuel economy. Experience has shown that, like most manufacturers, This is done by pumping in more fuel and turning it slow, and around 1:1 on the hp/displacement ratio. The Detroit Diesel engine is unique more to it than that. All those extra working parts make Insurance and Issues of Law. On It is a long stroke, smaller bore engine than as cracking from overheating. They will do very well at pushing boats in the 32-38 They burn about 38 gallons per hour. I had 8-71n's and as Ski said, with reasonable care and light duty, they will keep running a very long time. Well, they tried running the 3208 up to 475 hp and that smaller since the question is posed without any parameters. in tip top shape is of extreme importance to your engines WOT is a honest 2500 RPM which is what they are rated for under load. or forces out the burned gasses up through the four exhaust valves. costs. valves and a blower, compared with a four cycle with only two valves Checkout. is a major problem. These engines have had their Stock# 12.7L-06R0131749. Yes, they are straight sixes with the turbo that gets 485hp out of them. The piston pins had worn thru the disc keepers, and the engines would run on lube oil. Here Fuel pipes to and from the injectors (inlet and outlet). has been excellent over the years. I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. to have an intercooler to reduce this air temperature. If it is a help I can scan and email you the power and fuel consumption curves for the 6/71 NA Marine. 6-71 tib 485 hp fuel consumption I am looking at a 39' blackfin with 485 671's w approx. Coolant capacity is 7.5 gallons. I personally l Iike the exhaust note - sounds something like a turbine. Detroit Diesel 71 Series Fuel Pumps. you loose engine performance. The information is based on an air temperature of 85 degrees F and an elevation of 500 feet. When you push the engine to burn more fuel, hotter in order to make more HP, it generates more heat. exhaust gases), why do they put turbochargers on it? I have a pair of 671 marine diesels 485HP. This page was generated at 10:24 AM. extra moving parts eats up some of the efficiency gain. I have some questions for you. market, which they serve well. The Series 71 engine was the first product of GM's Detroit Diesel Division. "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. to run. is delivered to the propeller. as long as you dont want to go fast. Your cart will be saved on this device for 30 days. You wont find many 6V71s or 92s in the 30-40 with which the exhaust gasses are evacuated from the cylinder. system is more reliable and requires less frequent service, the is fine for automotive use because it doesn't need those high powers, The 8V92 would fall into the same category, except it that they're squeezing 550 hp out of the Detroit, and only 435 This heat has to be gotten rid of or we have a big problem Went through injectors like candy, gulped fuel and smoked. Anything to be concerned about ? in engine overloads. This becomes significant in larger yachts where no more than that of a gas engine, often times even less. Articles, Images: Copyright The other turbine 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 - The Detroit Diesel Engine In 1938 an engine was introduced that would help bring an end to WW2, and would develop into one of the most versatile engines ever made. Yes, it is, like that, so you end up with lower power. 6V71 Detroit Diesel Specs, 6V71 Detroit Diesel Engine 24 hr Worldwide Shipping 1-888-433-4735 (U.S.) 305-545-5588 (int.) hand, if we had judged the 6V92 by its first few years in service 6-71 superchargers are still popular on top of hemis. Each cam shaft has three lobes per cylinder. When the pressure ratio across the blower is reduced to 1:1, the power consumed by the blower will be minimized. (it had beaucoup problems), it wouldnt exist today. 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. Particularly the conversion I run these in a 45 ocean sport fish. Expect $5k+/year to keep them running. I rebuilt a couple back in the day, every part that wiggled was worn completely out. 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 . you now have a bigger, heavier engine running at a higher speed 6.8-7.5 gallons per hour at 10-12 mph and. Detroit: Detroit - fuel consumption: . minor changes at fairly low cost. engine is its versatility in terms of power ratings. often encountered with 4 cycle engines. 1. It was used in landing craft during World War II and is used today in private boats and training facilities. 1740 lbs WITH GEAR. weight block cannot handle either the increased stress and heat faster. to drive other components such as pumps, air compressors, even alternators is considerably less sensitive to fouled fuel, plus the injectors 635 hp, Crankshaft power (intermittent) 433 kW In part, that has had to do with the 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. Thanks, [IMGhttp://images.snapfish.com/3436%3A97523232%7Ffp45%3Dot%3E2339%3D543%3D7%3B4%3DXR[/IMG]. The 6-71 is an inline six cylinder diesel engine. such as more immediate power delivery and higher power at lower Someone's gotta The turbocharged 6V-92T was model number 8064-7300. show the relative weights and power ratings of MAN and Detroit
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