Start of a 1971 kenworth cab over powered by a Detroit diesel two stroke V12 with two 6-71 blowers and dual 5'' straight pipes. It was about 35*f outside.
A modern rotax, optimax is much more powerful for its size and can run in any position, a Detroit with a sealed crankcase can do the same with fed ester based plant based 2 stroke oil, total loss burn off anyone
A twin turbo 600 horse 12V-71 could often be found as a starter motor in a General Electric Frame 5 or Frame 6 gas turbine generator set. They started and idled for about 20 seconds then ramped up to wide open throttle. It drove a Twin Disc torque converter which turned the gas turbine through a jaw clutch. It would run the turbine to 20% speed where fuel and spark was introduced. The Detroit would scream its guts out accelerating the gas turbine to 50% speed where it would outrun the jaw clutch and go to 100% speed or 5100 rpm. The Detroit would idle 5 minutes for cool down, then shut off until needed next. Brutal duty!
This thing sounds like a racecar! I think it is one of the best sounding engines on the internet, and that rev at 1:37.. No matter how many times I watch this I can't get enough of it!
poppet valved drag race loop charged 2 strokes are well known for quick cars with a blower, its time for the piston ported ones to come back, both brap though and perform the same functiuon, its 2 stroke vs 2 stroke hehe
I don't pretend to know much about Diesel Engines... But I know a engine that ramps that quick up it's rev range and sounds that good is almost always a monster.
I learned on those old cabovers in the 70's when my dad was still a owner operator. Started in a 70's F-model Mack, w/a V8 twin turbo 5sp. Then a 82 Mack CruiseLiner, 350 Cummins, 10sp. An 84 Pete 379EXHD. 400 Big Cam. 15sp. Finished in a 84 Pete 379EXHD. 444 Cummins, 15sp. My 1st truck was a 80's KW K100 "Aero" w/a mean ass KT450 15sp. In 15th gear, you were either lugging or flying!!
If I could still climb in a truck I'd drive that one from coast-to-coast and love every minute of it. Some may call me crazy but if you love it then nothing else needs to be said.
heh - I came across an old GMCAstro with a 6-71 sitting on a property a few years back and the owner saw me gazing at it. He's a really funny & hard-bitten old road dog so he got nostalgic pretty quick. He told me that the secret to drivin' her was - Every morning before you start it up you have to SLAM the door on your thumb. Cuz yaa gotta be really MAD to drive it properly.... :D never got to take it for a burn though :/
If you can, start lifting weights, walking a mile or two, and swimming. You'll find that you CAN climb in and still shift the gears. Try BPI Sports Amino Acids, they'll help those sore muscles.
You'd need ear plugs or hearing aids before you reached Nebraska. Ive been around a few of these old monsters and their noise get annoying after a few hours.
Craig G not taking anything away from a Detroit but those old 2 cycles didn't have the low end torque a Cummins or a Caterpillar had. Never the less they did ok. nice sound to boot
Wow what a BEASTLY SOUND!!! I did drive an old crap spreader back in the early 80's. That had a V12/71! That ran like a scalded rabbit! Sounded like a scalded lion!! I'm not sure what the Pierre ratting was, but it had some power!! Lots of speeds too, like a gear for every 5 mph!!!
What an awesome piece of machinery. I had the experience one summer when I was in grade school and spent the summer with a class mate and his Dad doing runs during summer vacation in a cabover Kenworth identical to that, talk about a rough ride, just a few hours on the first run, my kidneys were about to fall out.
A real 2 stroke uses its crankcase for an air compressor is more compact and does not need an external blower. Fairbanks morse did this with huge engine as well as all sleds, bikes and JLO diesels with total loss oil burn off. look at most high performance outboards that make way more power for there size than these wanna blower helped 2 stroke detroits, sleds and outboards desighns are much better, a modern 850 etec rotax is much more powerful without all this wet sump crap!
@@jlo13800 You aren't talking about 2 stroke diesel engines. 2 stroke. oil /gas burning engines are apples and oranges. GM Diesel 2 strokes require superchargers to run and are considered Naturally aspirated . Turbos are added as performance upgrades.
@@VitaminC440 True but a detroit burns some of its oil and you rig it up for total loss oil burn off if you want, i fill and run klotz techniplate 2 stroke, 8 gallons in my 8v92 and feed some into the fuel, boy its not cheap though
@@jlo13800 Agreed most diesels Especially turbocharged ones will eventually push oil past rings ,seals yadda yadda. Klotz is good shit. I used to burn it in my CR 125 elsinore. It smells like model airplane fuel. When it burns. If anything it will provide lubricity. For the old Detroit.. With today's low sulfur fuel. It's warranted..
I love those sound of the big Detroit's I had a silver 92 in my 1987 GMC General with a 256" wheel base what a screamer that blower and twin turbos kick in pulling up hills , let's not forget about topping up the oil every morning, I'm sorry just got carried away that sound drove me crazy, keep on trucking
The GM/Detroit 71 series was used very commonly in military landing craft and tanks as well as trucks, bulldozers, buses, boats, and stationary applications like sawmills from 1938 when the line was conceived to 1995 when they stopped producing the 71 series due to emissions restrictions.
i ran a terex scraper with that sitting next to me all day. the "little"8v91t was the pusher. just remember at after lunch to put a gallon of oil in the 12 and half gallon in the 8. Still love two strokes over claterpillers and cummeaters.
Everyt time I go to the hospital I think of this video since the a/c system sounds like the truck warming up. And when I do it cheers me up and makes me feel more at ease. Thank you for sharing this video.
The cold start governor hunting away.Seeing 10 or 11 of these in a fleet all starting up at the same time before dawn would be a sight and sound to behold.
What a sound Beautiful. I start this thing everyday for my neighbours Some wouldn't like it at first but they would learn to love it like a rooster crows in the morning. NICE sounding truck
That truck sounds like a monster, I can picture this truck laughing in the face of a V8 Scania and telling it to shut the fuck up and let a real truck engine roar.
It was a brute. 475 hp in 1970 was unheard of, this was the beast of the highway back in the day. I loved this truck and I dreaded see it go. It sold the day after I recorded this. I dream of one day owning a kenworth w900a with a 12v71.
+chevy power believe me I thought about it but that would of destroyed that cab over, and it had some extremely rare features for example, it was equipped with an experimental air clutch from kenworth.
***** Will do. And with a 2 stroke you get twice the firing cycle as a 4 strokes. They stopped making them since fuel was expelled out the exhaust. Now diesels injects later, when all valves are closed so it's theorically possible to only use clean air to 'dump' the exhaust gases out. (2 strokes diesels used air to flush the cylinders on BDC)
***** on diesel 2 stroke as well, but not in the same way. The intake of air is done at the bottom dead center, thus the exhaust air doesnt as much time to burn. Diesel burns and doesnt explose. So it has half the time to burn and the new air push it out the exhaust . And yes, 2 stroke petrol is even more notorious for unburnt fuel out the exhaust
mashed-\ /-out HAHAHA ! The reason they stopped making them is because of that. unburnt fuel out the exhaust. For several years they mitigated it somewhat with electronic control, but then the regulations got harder and harder and they stopped the 2 stroke lines despite sales still being high. Even Penske tried after they bought detroit diesel in 1988, then MTU tried when they bought it from Penske. Emissions WAS the undoing of the 2 stroke detroit diesel and this is fact. The 4 stroke could be made cleaner at the time, so they ran with that instead. You cannot argue it, so suck it up and try to actually know something before saying others dont. And now we have more technology to try again. Even Honda filled a pattent for a 2 stroke engine
The sound of the Detroit can be heard from miles if you know the sound. I've drove for 12 years now and the first truck I drove was a old food lion cab over. Had the big ass steering wheel in it and my god was it a ugly ass truck but it did the job. My old man loves a cab over exp the 63. I've only seen 3 63's in my life and I'm 38 yo. But idc who you are if you like big trucks it never leaves you. I've been into trucks as long as I can remember. My dad had a w900L it was purple and that's the first truck I remember my dad having. I'm a 379 ext hood guy but I don't hate on any truck. Ok I've got to shut up bc I could talk truck's all day long. I never get excited about anything but when I see a nice truck I get excited like a little kid. The wife says she loves it when I get so excited about a truck but also hates it bc I don't get excited about anything else. Lol. Cant help it trucks and trucking is in my blood. Hammer down. Nice cab over by the way. Screaming Jimmy lives on.
Good old 2-cycle Detroit Diesel love the old-school rain caps AKA flappers would be cool to roll some coal in that gnarly old machine very old school love it smart letting it chug along until it gets its lifeblood circulated so cool to watch it smooth out you did everything proper that is so gnarly
I love the grin on his face as he walks by to grab the camera. He knows some people are about to enjoy that sweet Detroit diesel sound just as much as him
i had a 76 but it was air start. never could find the leak so when i got home i just had to air up the tanks to start it if it set for 2 or 3 days. nothing sounds as good as a v12 2 stroke
Holy Smokes Batman !!! What a beautiful sound. Please make her live many more years ! Please can you do a vid of it hauling ? Sweet sweet noise man 👍👍👌👌
Sounds like ke crap to me rotax erect makes more power for its size and it don’t need and external blower, it uses the crankcase like Fairbanks model 32
It doesn't make money to make stuff last. I use to like ferd until after 03 and they ended the 7.3 powerstroke which could get 500k-1 million miles before needing rebuilt.
i drove a gmc general with an 8V92. when the jake kicked in,it was obnoxious and i laughed..i cannot imagine driving down broadway in bangor maine n letting the jake chirp with this truck!!
This is awesome! So many bad things have been said about cabovers but with the customization abilities today, even for tractors, any of those problems that plagued the cabovers can easily be overcome. Hell, how hard would it be to use a European cabover as a donor and swap over all that would be necessary to give a cabover such as this all the modern creature comforts of a conventional tractor? You can effectively have the best of both worlds.
A crane company I used to work for had a whole bunch of nice Cat-powered Kenny COEs for delivering Scissor-Lifts and Boom-Lifts. They probably had more of them sitting in their yard then I've ever seen on the roads. 'Twas quite a site to see. I kinda miss them, tbh. They even had one with a 3408B in it.
