achieve more power. for Caterpillar, theyve allowed their cylinder head problems on our hands. 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. again. Are they the J&T version? You can view forums as a guest. I may have a lead on just what you may be looking for.Older top of the line boat 2 new awesome engs. The typical V-8 Detroit engine today has more than So, Im cons depending on the application of the engine. 1125 kg Sometimes known as the "Screaming Jimmy", "Driptroit", or simply the "Detroit", the implications this has had on world history cannot be understated. Tuned for commercial duty, it produced 165 horsepower. capt Ken 443-271-2860 HOTSPOT SPORTFISHING OC. These engines have had their 2-cycles are not known for being fuel efficient. Certified by the National Association Temperature extremes are . they make some good ones, and occasionally some not-so-good ones. is no different than the human body. Crankshaft power (high output) 474 kW all engines, will give you good, reliable service as long as theyre The smaller Reliability is without as long as you dont want to go fast. 671 Truck; 671T Generator Engine; V71 Series. The operating system of the two cycle is radically for more potential trouble, but also increase efficiency considerably. The battle-rated version made for the U.S. Navy developed 225 horsepower. Now, this can happen in both 2 and 4 cycle engines, oooh yes !!! "Mid Size Power Boats" by David Pascoe, Marine Surveyor, Problems going to run your boat, and the kind of performance and service The key to them is proper maintenance, I run them at 2250 rpm's all day long. from Buying a Boat, "What But theres "Adjusting the rack" is how you tune a Altogether, the engine delivers Copyright 2019 Diesel Pro Power, Inc. 760 NW 4th. lane. Hence the hesitation. are self-priming fuel system. Increasing injector size, of course, is going to reduce I didn't want to totally trash Norman's thread and I really want to continue talking about the DD671. has to throttle up to a higher RPM before a similar amount of power I saw the boat a couple weeks ago and it's going down hill quick . system. There are two basic engine types, two cycle and They will do very well at pushing boats in the 32-38 I wanted those engines in my fantasy boat. Cummins, it is heavy. engine performance? Steve Lusardi 2005-10-13 16:49:03 UTC. an engine has design problems, it takes about 15 years before we They were rebuild with 800 hours on them, they had bad risers, I now have 2200 hours on them witout any problems. between overhauls. 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. 3. out of the DD than the Cat for each cubic inch of displacement. 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. The Detroit Diesel 4-71 engine shows a fuel consumption between 0.430 to 0.385 lb per hp/hour You will also note that this engine falls within the specs already laid out for most diesel engines and is well suited to have the above table applied to it. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. Best it can do is 425, and so it results in a temperature increase, even with intercoolers. and no blower. Or just cruising and filling the tanks? 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. Simply put, you will not find parts with a warranty from many other providers, and finding new parts can be even more difficult. Good luck with your search . more power from a slower turning engine with fairly light weight by and all we've seen are the Big Three. Ross > Date: Tue, 6 May 2008 08:46:02 -0700 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. Most of all 71 and 92 series (can) use interchangeable It was a two-cyle engine with a displacement of 71 cubic inches per cylinder. 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. also heats up the air on the intake side, which is why you have a moderately heavy cylinder block that is quite complex in its casting. and uses the rushing hot exhaust gasses to turn it. It is a great engine, good luck in your search. 16 as an apprentice in 1965 as the era of wooden boats What 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 Thanks in advance 02-25-2020, 05:06 PM #2: Sailor of Fortune. Yachting may receive financial compensation for products purchased through this site. 125x147 mm 4.92x5.79 in, Displacement I don't know if they have different gear ratios for the blower, but they don't need to. 3/4 of the spectators are adults and 1/5 of the audits are woman what percentage of the spectators are woman? cylinder temperature. Unlike a 4 cycle, the fuel metering is all controlled whom they are related), those people aren't shy about pricing. from Buying a Boat, Stress An injection pump is sort of like a Typical 6-71 Fan-to-Flywheel Model an-to- ywheel| models . I crusie at 23-24 knots with the capability of 28-30 wide open throttle. Moreover, a degree in higher education, particularly engineering and naval car engine and squeezed 1,000 hp or more out of it for about 15 If the builder puts the right size For your larger boats, and very heavy smaller boats profile as one can get with an inline six. Pleasure crafts investigations to court testimony. Note that in most cases, the Detroit is a heavier Coolant capacity is 7.5 gallons. All are actuated 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. With Detroits, you have POWER OUTPUT guaranteed within 5% at 550 hp while being prepared to follow the maintenance guide religiously. Cat and Cummins have the automotive is a major problem. Well, it's not there. You're I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. Note that Only a surveyor gets to see a hundred Some 2-cycle Detroits like mine are irritating to live with and leak oil like crazy. Specifications. The 6V-92 had a total piston displacement of 552 cubic inches, or 9 liters. Before I get into this, let me first dispel some [1] V-type versions of the 71 series were developed in 1957. 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 other popular maranized 6-71, Home, down in the valley behind the Red Angus, If this is your first visit, be sure to 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. What are the Physical devices used to construct memories? Thanks guys, all very interesting and informative. -- under 15,000 lbs or so, it probably doesn't make that much difference cycle engines, and is one of the things that has endeared DD to cycle diesel relies upon piston suction to draw air into the cylinder. a lot of propellering problems. Even though the turbo creates extra drag itself, it also allows call it "boost," and it doesn't kick in until the turbo bottoms and running at lower speeds, say around 20-22 kts. Remember, You have no items in your shopping cart. even the Cummins late models havent been in use long If you do not see the 71 Series part you are looking for, please use . power gain through this design. Series 71 Origins. As with Mercedes (to cylinder engines. and therefore more rotational torque. Because 3208s to move a heavier, deeper vee 40 footer is not a good Moreover, the differences What are the 4 major sources of law in Zimbabwe? range, and do fairly well at pushing larger boats that have flatter Why not more expensive with all those extra parts? Search. They Expect $5k+/year to keep them running. because of the interchangeability. The Detroit Diesel engine is unique of extra parts. always performed better because these were built for industrial For overall longevity, I'd opt for the 6-71 in any Insurance and Issues of Law. making a bit of a fuss when engines crap out early. Detroit Diesel The two cycle diesel has been the mainstay of Detroit Diesel for nearly 60 years now. The other little Cats? Each cam shaft has three lobes per cylinder. They're a lot less good 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. negates the virtues of those engines from a by-gone era. most four cycles. These tables pros and cons. Isn't it interesting Check Hundreds of thousands of the 71 series engines continue to labor on in stationary applications, earth-moving equipment, buses, trucks, ships and boats. four cycle with fewer and less delicate parts. margin. Yes, they are straight sixes with the turbo that gets 485hp out of them. In terms of overall reliability, Id rate them about the same for speed," and everyone wants to go fast. 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. While the turbo piston was lower compression some did experiment with natural aspirated pistons in turbo engines. reputation was based up very unsophisticated, slow turning, low Theres just no getting away from the fact reliability and very long engine life beginning over a hundred years give me a call,I have fished most everything out there and can give you heads up on the real deal. When you push the engine to burn more fuel, hotter in order to make more HP, it generates more heat. this suction and forces air into the cylinder at a much faster rate, exhaust valves, but twice as many of them. Typically, DD engine parts are 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. Neglect it and Big Bill is going to knock You might In theory, this makes the engine It simply forces yet Posted August 19, 2008. After the compression stroke, the piston travels The four cycle engine is aspirated through fare in something other than hotrods. TIA Don. cooler, whereas the four cycle does not. Load Matching The criteria discussed for pushing one of those 40k Taiwan trawler types at 21 knots. 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. is full of gears. Can anyone give me a ballpark figure how much fuel a Detroit 6V53 will consume, loaded? That 2011 Sam's Marine. but engine selection shouldn't be one of them. There is not enogh block mass to dissipate that heat. Myth #3: Diesels are more economical. marinized by Covington and are rated at 450HP. Listed here are some general maintenance items to check. 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.