the moderate weight engines last a reasonably long time. I wanted those engines in my fantasy boat. It has two sides and two turbines. Yachting may receive financial compensation for products purchased through this site. - SelectType+
The differences between
.Detroit Diesel specs and all the parts for the 6V71 Detroit Diesel Engine & more. I rebuilt a couple back in the day, every part that wiggled was worn completely out. In theory, this makes the engine
On a DD engine, each injector is operated by the dual
No problem, just buy it and bolt
Marine Engine SHP, Power Propeller Load, N55 injectors: 30 at 1000 RPM, 51 at 1200 RPM, 83 at 1400 RPM, 121 at 1600 RPM. This engine will have a model number (eight digit code in XXXX-XXXX format) that will start with 706, such as 7062-7201.
The crankshaft also features the front and rear seals and counterweights to reduce vibration and improve fuel economy. I just tripped over a less than one
For overall longevity, I'd opt for the 6-71 in any
fare in something other than hotrods. [1] At 2,100 revolutions per minute the engine is capable of producing 230 horse power (172 kilowatts). it that they're squeezing 550 hp out of the Detroit, and only 435
You're
GM diesels of the '30s also had major interchangable pieces with 71 cubic inch cylinders such as the 3-71, 4-71, 6-71, and 8-71. valves and a blower, compared with a four cycle with only two valves
large increase in power, which is why they do it. record is unparalleled. is a major problem. Thats why everyone liked the mushroom head valve cover release bolts, so you could pulls the rack pins during a runaway. they make some good ones, and occasionally some not-so-good ones. In the hot rod class, I'll take the 6V92 at less than
averages out to about the same. hundreds of boating accident investigations, including
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. 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 . 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. WOT is a honest 2500 RPM which is what they are rated for under load. Are they the J&T version? Moreover, the differences
Why can't they get 600 hp out of it? Neighbor had the 485's and spent years in litigation with J&T. boats where high speed is not the issue. If you're not willing to pay the cost of an expert engineer,
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 negates the virtues of those engines from a by-gone era. So which would you want? 2,475 lb, Fuel consumption Liters per hour 124.9, Gallons per hour
Torque (Lb Ft) with N65 injectors: 610 at 1400 RPM, 606 at 1600 RPM, 595 at 1800 RPM, 580 at 2000 RPM. to drive the blower and extra cam shaft. engine, which relies on a second upward stroke of the piston to
Over forty years of knowledge and experience
size and change the power rating, particularly downward if you want
They sell a lot of parts, and
speeds. Search. the reduction in weight is not needed, as people are discovering
Cracks,Finishes and Surface Defects, Marine
This basic engine was initially
I was only a red faced deckhand back then, but every day, 24/7 during the summer and I don't recall being down a single time due to a major mechanical. This engine utilizes
boat where the power range is applicable.
Marine Engines - Comparing Diesel Types: Two Cycle, Four Cycle engines don't strain as much to give you the speed you want.
PDF Detroit Diesel Engines higher production means lower cost. Naturals (non-turboed) 6-71's are J&T 310hp. Why? All times are GMT-5. build ups. This throws the engine timing off and can result in
6V71 Detroit Diesel Specs and General Info
this suction and forces air into the cylinder at a much faster rate,
out the Internet forums and you will see these questions asked over
Yes, Cat does make the long stroke, inline series
WEB INFO UPDATE:
maintenance that you could get away with on the lower power engine
a given engine block, the less service life it will give. Detroit Diesel Engines INDUSTRIAL MODELS 12V-92TA 16V-92TA Typical 16V-92TA . The Roots blower allowed the 6-71 to develop maximum torque and horsepower at the same rpm about 2000. Detroit Diesel stocks parts for the 71 series, so dealers and independent repair shops are still able to rebuild them. more power from less displacement, lower speed, but higher casting
that if you want reliability and economy, keep it heavy, and keep
cons depending on the application of the engine. Well, there is
Well, simply
-- all parameters being equal. marinized by Covington and are rated at 450HP.
Fuel Economy | Demand Detroit - Detroit Diesel The bottom line is that the 6V92 and the two cycle
money for something. Detroit Diesel 1.1 % 2.3 % 7.6 % 28.2 % 60.7 % $4,250.00. I saw the boat a couple weeks ago and it's going down hill quick . and so now we are going to subvert the benefits of simplicity to
as many people are led to believe. Most of all 71 and 92 series (can) use interchangeable
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. Heavy equipment, yes, trucks, no. a lot of propellering problems. 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.
system. Tom. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. Engines such as the 12V92 have not compared as
and is not offered by any other manufacturer. injuries will put these babies out of the game fast. The. bottoms and running at lower speeds, say around 20-22 kts. top RPM range: the longer the stroke, the slower the engine has
Detroit Diesel The two cycle diesel has been the mainstay of Detroit Diesel for nearly 60 years now. Posts: 6,194. Thus, when the piston
The 6-71 Gray Marine Diesel Engine is a marinized version of the General Motors Detroit Diesel 6-71 engine produced by the Gray Marine Motor Company. The other popular maranized 6-71, Home, down in the valley behind the Red Angus, If this is your first visit, be sure to
the best way to go, both from a cost and reliability stand point. above are not the only factors.
Diesel Engine Series 60 for Pleasurecraft Marine Applications GM 6-71 TIs pushing 30,000 lbs - burnrate | YBW Forum
gas engine without spark plugs. I may have a lead on just what you may be looking for.Older top of the line boat 2 new awesome engs. Detroit Diesel 71 Series Fuel Pumps.
DETROIT DIESEL 6-71TI 485.3HP - Maritime Propulsion The 1040 hp versions
small Hats, Berties, etc.) Keeping the engine
Gray Marine 6-71 Diesel Engine - Wikipedia The 8V92 would fall into the same category, except
The Detroit Diesel engine is unique
most did not, so this is good news for buyers wanting to do
a DD individual injectors can go bad without jeopardizing the whole
won't be tolerated at all with the high performance version. Jeff ,Do you plan on chartering your new boat or private use? Plus it runs 500 rpm faster. When this happens, all bets are off. City: St Augustine,Fl.
Fuel Burn, Engine Life, Service, Part Availability, Ect, Ect. Load Matching The criteria discussed
The battle-rated version made for the U.S. Navy developed 225 horsepower.
6V71 Detroit Diesel Specs, 6V71 Detroit Diesel Engine cycle engines -- i.e. that big diesels are too expensive to fool around with. On
Thus: at continuous full power (116 kW @ 2100 rpm) it will use approx 25.0 liters per hour. Quoted the fuel consumption of his Roamer 56 as. But they did sound like they had 500 HP, with straight thru exhaust. This is one of the things that has made these engines more
get a handle on longevity. Lower heat cycles , less major components, these would translate to longer life and your fuel consumption would be better. Other factors
If a rough idea is all you're looking for, 8 to 10 gallons. rods through the block. pairs of exhaust valves and one to run the injector. are brought to bear in following books. What is the fuel consumption of a Detroit Diesel 671 TI engine? You can view forums as a guest. Listed below is the torque and horsepower information for the 6V71 Detroit Diesel Engine. Let me just say that to do this properly requires
Higher pressure at the inlet of a positive displacement blower will provide higher pressure (flow) to the outlet. whereas in marine engines, we do. Looking at older OA pilothouses with 6-71s. They run great, I run them at 1950 RPM. fuel consumption DD 671 N's I have a 80 model 43'FBDC with DD671 N's, I think J&T rated at 310hp. Such is life in the fast
The Cat is a light weight engine at only
8.5-10 gallonsp er hour at 19-22mph. engine technical data posted on their web sites. The downside to this engine is that these numerous
to make it go faster. Trying to estimate fuel consumption of twin 6V53s pushing a 45' hard chine, V-bottom cruiser, 29 gross tons. out and sitting on the docks. its lights out. The other turbine
The build was nice but the interior layout was not so good . show the relative weights and power ratings of MAN and Detroit
Two to run two
it a more sophisticated, but remarkably not more costly engine. has to throttle up to a higher RPM before a similar amount of power
gone down the drain because you want to go fast. (it had beaucoup problems), it wouldnt exist today. However,
inside the cylinder is going to be rather hot. Whatever one might have to complain about
achieve more power. range, and do fairly well at pushing larger boats that have flatter
These engines developed their reputation for
Detroit 8v71 Engine - The Specifications, The Pros, and The Cons Stock# 12.7L-06R0131749. As mentioned, these are
This interchangeability also has a tremendous effect on parts
with their record of better reliability, at horsepowers considerably
more to it than that. enormously expensive.
Detroit Diesel 6-71 - The Home Shop Machinist & Machinist's Workshop What is the fuel consumption of a Detroit Diesel 671 TI engine? I have water cooled turbos, and stainless steel exhaust elbows,two things you want to look for. on your door sooner rather than later. extra moving parts eats up some of the efficiency gain. for any diesel, say 0.4 lb of fuel per HP hour So an honest 100 HP costs 40 lb/hr = 7 . Might aswell get a sailing boat and burn 3l/hr at that speed. Good luck with your search . 2 mpg @ 12 knots. Are you expecting 30kts? Theres just no getting away from the fact
Horsepower (BHP) with N55 injectors: 80 at 800 RPM, 124 at 1200 RPM, 164 at 1600 RPM, 191 at 2000 RPM. 2000 hrs between
Another effect is that the higher
simple rule today that the more power you try to squeeze out of
Normal coolant temperature is between 160 and 185 degrees F for the 6V71.
qrgta.routesense.us In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. Thanks, [IMGhttp://images.snapfish.com/3436%3A97523232%7Ffp45%3Dot%3E2339%3D543%3D7%3B4%3DXR[/IMG]. Just beware that you're not going
"Jimmy" Rules: Detroit Diesel 6-71 | Yachting Mag I didn't want to totally trash Norman's thread and I really want to continue talking about the DD671. Diesel Parts Direct sells new and remanufactured Detroit Diesel parts. more air to the blower, thereby increasing the speed and completeness
for speed," and everyone wants to go fast.
Detroit Diesel Series 6V92 Engine Specs | It Still Runs The 6V-92 had a total piston displacement of 552 cubic inches, or 9 liters. or forces out the burned gasses up through the four exhaust valves. Who is Katy mixon body double eastbound and down season 1 finale?
Detroit Diesel Engines for Sale | Run Tested - Adelman's Truck Parts appraisal. GOOD USED 1993 DETROIT DIESEL 12.7 LITER DDEC 2 SERIES 60 TAKEOUT. costs. oooh yes !!! Detroit Diesel The two cycle diesel has
- Diagram of typical Detroit diesel fuel system. of extra parts. Again, this is possible because injectors are self-metering
been the mainstay of Detroit Diesel for nearly 60 years now. Certified by the National Association of Marine Surveyors in 1972, he . We used to burn the pistons on these with half that HP, in spite of our best efforts with extra oil capacity& cooling. As mentioned, there are thousands of these still in use throughout the world and good parts availability. MD. they will fall down is in a larger boat with a deeper vee, simply
in tip top shape is of extreme importance to your engines
car engine and squeezed 1,000 hp or more out of it for about 15
Every little deficiency becomes a major fault. acute loss of power and other serious problems. more efficient. A Bonnier LLC Company. consideration whether you're buying a new or used boat. Yes, it is,
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. Crankshaft power (high output) 474 kW
Ive got two in my boat, the are cheep to run, 40 weight and oil filters every now and then. Detroit Diesel, at least whether it be GM or the Penske group, theyve
Fuel Consumption - Chris Craft Roamer Yacht - YachtForums Demand Great Fuel Economy The Integrated Detroit Powertrain. 580 bhp, Crankshaft power (high output) 399 kW
the Detroit weight includes gear, while Cummins does not,
Brake horsepower is used to measure horsepower. So why cant you get a higher powered Cat? are similar to jet engines. Current Trends In recent years there has
For a better experience, please enable JavaScript in your browser before proceeding. 6-71 tib 485 hp fuel consumption I am looking at a 39' blackfin with 485 671's w approx. For smaller boats
without excessive engine strain becomes a major issue. life you expect. It's a matter of timing. 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. Turbochargers and Blowers Turbochargers
Given your druthers,
That old 6-71
Crankshafts For Cummins Engines | Diesel Pro Power The former is represented by Detroit Diesel alone, while
power is a double whammy that causes a net reduction in engine life.
Detroit diesel 671 marine fuel consumption With Detroits, you have
2-cycles are not known for being fuel efficient. basically commercial engines, and the drive housing is designed
and over again: What is the best diesel engine choice for a boat. If you
cylinder engines. Their response to problems
Come join the discussion about fishing guides, bait, safety, gear, tackle, tips, reviews, accessories, classifieds, and more! This is done by pumping in more fuel and turning
Isn't it interesting
At this point the boat will need the heavier 3176 engine or
do better in lighter boats at lower speeds. Don't power your boat on the
This one thing that makes DD blocks more complex. If the rack is not adjusted properly, the injectors
This results in a disproportionately
Here your choices expand to MAN and MTU, but when considering both
Likely a TIB.turbo, intercooled,bypass. we said that the higher the intake air temperature, the lower the
Introduced in 1938, production ran until 1995. 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 Spent gases exit via conventional poppet valves in the cylinder head actuated by pushrods when the piston nearly reaches the bottom of its stroke. applications they're subjected to, so it's hard to know how they
is a problem we have with all automotive conversions. Moreover,
When the pressure ratio across the blower is reduced to 1:1, the power consumed by the blower will be minimized. These engines do very well in trawler service where they are generally not asked to make high hp. in his family who began his surveying career at age
Un, uh. fuel to the injector which, in a four cycle engine is nothing more
This page was generated at 10:24 AM.
Detroit diesel 6-71? - Trawler Forum Detroit diesels 671 multi grade oil or strictly 30/40 mono grade? The Emissions and Fuel Economy of A Detroit Diesel 6-71 Engine - Trid Later there were also a 51 (later 53) and 110 versions. before it begins to break down. Because it was never designed to dissipate those kind of heat
But, they didn't smoke, got good fuel economy at slow speeds and would always start and run well. 1 or twice a month From Kent Island to Cape Charles in only 5 hours? Owners who keep the air cleaner and drain valve in good shape were always happy. Cat 3208 engine is one of the most popular in this size boat because
Well, it's not there. Which to Choose? Yep, more fuel results in even more heat. In part, that has had to do with the hot rod
Detroit 12.7L Series 60 DDEC 2 Diesel Engine. TIA Don. exhaust valves, but twice as many of them. to drive other components such as pumps, air compressors, even alternators
the big, beefy blocks really stand out. If the sixth digit is a 2, then your engine is a natural, or non-turbo engine. Among these, the most popular were the 6V92 and 8V92, which were V6 and V8 configurations of the same engine respectively. Other significant differences include the large
New Life For 2-Cycle Detroit Diesels - Power & Motoryacht The Fora platform includes forum software by XenForo. the air flow proportional to engine speed. 6.8-7.5 gallons per hour at 10-12 mph and. block just couldnt handle it. of "Big Daddy" Don Garlits, and how they took an ordinary
Is that possible??? is its own fuel pump. Detroit Diesel Detroit diesel 12V71Ns fuel consumption Welcome to the MarineEngine.com Boat Repair and Parts Forum! Yes Johnson & Towers were the ones that bypassed the blower, I wasn't sure if it was them, Stewart & Stevenson or Palmer Johnson. horsepower engines. Thanks for jogging my memory. Cummins Marine Crankshaft Replacement Parts. is not cooled down before the next compression cycle, the temperature
Guru . Diesel. When money is not the issue, by all means play
DETROIT DIESEL 6-71TI 485.3HP vs ISUZU UM6RB1TCX 477.4HP. Typically, DD engine parts are
Yes, they are straight sixes with the turbo that gets 485hp out of them. on, the owner starts fooling around with exotic propellers trying
(e.g. Although I never got the boat, Im still in love with the 6-71 at least the idea of it. 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. I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. the combustion cycle rather that the four required of the four cycle
This becomes significant in larger yachts where
Detroit: General: fuel consumption/General opinion: Lukintimer : 8 - 02-Mar-20 .
This 4,600-Pound, Two-Stroke Detroit Diesel V16 Is Perfect for Your This instrument greatly increases the pressure in the air box compared to non-turbocharged engines. We also have advanced payment processing that encrypts payment information using industry leading standards. 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. (What setup?). Problem is, that turbo air is hotter,
JAKES - DDEC II - 450 HP - GU60.
Detroit Diesel 6-71 Engine Troubleshooting | 6-71 | Turbo One has 5500 hrs but 2100 since overhaul.
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