Dirtydog (Forum Supporter) said:As for the 6-71's, years ago, my late friend had twin 671T's in his 42' Egg Harbor Sport Fisherman. Boy, that thing could move, and sounded pretty nice when on plane. I believe you can reline the cylinders, when needed. Might be wrong though, been a while.
They are a wet sleeve block, so ya just pop in a new sleeve/piston kit, and run on!
03Panther said:One of the things I always thought was cool about them, is them being built to be "lego's" The heads of a 8V71 is simply a pair of 4-71 heads, and so on.
A 20V71 consists of two 6V blocks and an 8V block. And so on. Pretty cool.
53 and 71 (c.i. per cylinder) series came in 1-, 2-, 3-, 4- and 6-, and 6V and 8V. These could combine to make 12V, 16V and 20V. All sharing heads, injectors, rotating assemblies, and lots of other items.
That was the common way to add power back in the day. Take your proven reliable inline four or six and add a couple cylinders. Now they add other things to the basic engine like turbos.
regarding the supercharging, the only two stroke diesels I am familiar with are the Detroits, and they need a supercharger to pull air in. They cannot suck like a four stroke pulling vacuum through a little intake valve.
And here is my current favorite.
In reply to bearmtnmartin (Forum Supporter) :
That girls got talent. I'm pretty good. She's a whole 'nother level of good!
In reply to bearmtnmartin (Forum Supporter) :
That grin on his face. I know that grin. That's the "you're a grease girl, can we get naked" look.
I was surprised just how many memories the sound of that engine brought back - I was NOT expecting that at all. Just hearing it, my brain is like "Well, yeah! THAT's a sound I haven't heard in YEARS!"
Dirtydog (Forum Supporter) said:As for the 6-71's, years ago, my late friend had twin 671T's in his 42' Egg Harbor Sport Fisherman. Boy, that thing could move, and sounded pretty nice when on plane. I believe you can reline the cylinders, when needed. Might be wrong though, been a while.
It really moved because it was close to 1000 hp. Turbo'd 6-71 on the water makes 450 - 475 hp. About double its output on land without the turbo. It's a setup that would overheat quickly if not for all that abundance of water to cool it.
A 401 CJ said:Although I don't believe it was originally designed by GM, they built by far the most of them and if weren't for the prodigious filth exiting the exhausts, they'd still be powering the world. Any deep look at them will conclude that whoever thought of it was a Berking genius. Simple, easy to package (2 stroke is physically smaller), and most importantly scalable. Need to run a pump? Here's a 2 cylinder. Truck or bus? Here's the same thing with 6 or 8 cylinders. V or inline. Off-highway truck or large bulldozer? Here's a V12 or V16. Locomotive or power plant? How about all those same configurations but just scaled up?
Detroit Diesel had it's beginnings as a division of General Motors and remained one for decades.
Electromotive (locomotives) was also a division of GM from the 30's. The prime movers of the locomotives were not Detroits, but were very similar in basic design as 2 strokes. They were just very scaled up for railroad service.
Charles Kettering, a famous name in GM history, was behind the design of both diesel engines.
When I was in the 8th grade we lived at the top of a long hill on a 4-lane highway. The sound of the 18 wheelers with Detroit power coming up the hill was unmistakable.
My closest experience with a Detroit engine was an Atlas-Copco mobile air compressor with a 16V-92. It had 2 superchargers and 2 turbochargers and pushed 1350cfm at 135psi. I worked in a power plant that was having our plant air compressors rebuilt while we were still online. We had 5 Atlas-Copco's lined up outside. They were all piped to a 3,500 diesel fuel tank, as you couldn't keep up otherwise. They had an oil reservoir mounted on the chassis that kept the engine oil topped up via a float arrangement in the oil pan. The compressor would shut down if the reservoir ran low. They did burn a little oil....,
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