I drove a 6-71 non turbo in a GMC 9500 triple axle ready mix truck back in the 70s. I was 18. It seemed big and powerful to me at the time. We grossed around 70,000 lbs with 10 cubic yards in the drum. Ignorance was bliss LOL. I didn't realize how underpowered those trucks were until I reached age 21 and got my over the road license and "graduated" to "big trucks" with more powerful engines. The first over the road job I had I drove an 8v 92 TA "430" Detroit in a COE Freightliner. It was then I realized how underpowered those ready mix trucks were. This 1050 lb/ft, 500 hp deal would have been a real hot rod.
I’d like to know it’s fuel consumption to horse power ratio .. against more modern power plants - the over done ECU jobs ! KISS ..! Just love that jimmy bark 🤗 We had 245 hp on the Terex dozers on H65 injectors if I can remember ..?
485 is super impressive for a 671 my goodness. Bus Grease Monkey worked on a set of these in boat a while back which were rated somewhere around 400hp as well. So perhaps slightly more long lasting, but considering the road going was intened to be something like.. what.. 300ish? if that? that is still quite high strung. I get what you mean with rating them conservatively. I keep the E-7 in my cabover downrated just like my uncle had it when he bought the truck, and it had well over 1million miles on it before he did a major rebuild and sold it to me. I uprated it slightly when I was working it commercially, but these days its retired and pretty much used to pull a modified holiday trailer and the occasional 45 foot repurposed refer for a local music festival.
My 671 in my trawler has about 12,000 hours on it and isn't close to a rebuild. Only rated at 180 hp and maxs out at 1650 rpm. 2,000 hours is a short life, but thats big hp for a 671. Great donks.
Those old 2 strokes had So much potential. They NEVER Should have discontinued them! Emissions? BULL Shit, give'm a longer stroke, and slow'm down a little. They could run modern electronic injection, and a variable blower to Step Up with the throttle. Like WTF?
Love these videos pity we couldn’t get outside noise happening because some of these motors sound awesome have outsid sound and note would be music to our ears 👌😎👍
Only 2000hrs ... assume that's from extreme duty mentioned. A shame Detroit hadn't continued development of a 2 stroke diesel line. Fucking EPA and others are bought and paid for...Otherwise I believe 100MPG Autos and light trucks would exist.
I hate these 4 jokes in cars/trucks and these ugly 4 joke stupid looking expensive out boards they can keep them. I got a 4L v8 johnson small block 2 stroke and an turbo 8v92. Both are running with BRP XD-100 etec oil.
From what I have seen the 2 stroke opposed piston engine might be bought back thanks to modern technology so maybe the old commer knocker was a bit ahead of its time
charlesangell_bulmti..... Detroits biggest mistake was not further developing the 6-110/6-110T, instead of dropping it, in 1965. They Completely mis-read the future hp needs of the trucking industry and the "simplicity" of the inline 6. They're dyno cell tests had them up to 750hp @ 2350!! Even at 350hp in 1963, they were a full Nine years ahead of Cummins, when they released the NTC - 350 "small cam".
@@dynosmith2187 thank you. That is impressive, finally some one that knows the difference between gear train timing & cam timing .!!! . I have a v-12 71 tta bypass blower with cleam cam technology supposedly tier 2 with their injectors 7495 dynoed 650 hp want to push it further .
@@ruxoneto6560.... We were pushing 2500hp & 3000 lbs ft of torque with the 12 (series 71) in the Sled puller (74 KW, ext. hood) and turning it at 4000 - 4,200. Over 11,000 hooks on the sleds over the years... and only spun one main bearing during a pull in 2006! PS: Did I mention that it had 1.6M miles on it when it was "retired" to full time sled pulling (NTPA and ECPA, plus many county fair pulls)!! Two degrees advanced cam timing is all you can go. What the Vast majority of people Do Not understand with these engines (Series 71), is that valve opening Begins at just 88 degrees of crankshaft rotation from TDC.... What should That Fact, alone tell you (meaning Anyone)?... and they think that their big inch, long stroke, Cats, Cum-a-parts, Macks, etc... are impressive!! Ignorance can Really be Blissful!! lol
@@ruxoneto6560... "Hand built" 240cc.... but, it takes a Lot more than "just" big injectors to make it all work. DD had a 6-71"x" on the dyno in one of their "back room" test cells, in 1969/70, that was developing 743 hp.
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I bet it could push a 16 foot flat bottom.....yep all the way to the bottom 😆 great video 👍👍👍👍 very cool
I drove a 6-71 non turbo in a GMC 9500 triple axle ready mix truck back in the 70s. I was 18. It seemed big and powerful to me at the time. We grossed around 70,000 lbs with 10 cubic yards in the drum. Ignorance was bliss LOL. I didn't realize how underpowered those trucks were until I reached age 21 and got my over the road license and "graduated" to "big trucks" with more powerful engines. The first over the road job I had I drove an 8v 92 TA "430" Detroit in a COE Freightliner. It was then I realized how underpowered those ready mix trucks were. This 1050 lb/ft, 500 hp deal would have been a real hot rod.
I’d like to know it’s fuel consumption to horse power ratio .. against more modern power plants - the over done ECU jobs ! KISS ..!
Just love that jimmy bark 🤗
We had 245 hp on the Terex dozers on H65 injectors if I can remember ..?
Love my J&T 485s in my 44 Ocean!! Run amazing….
485 is super impressive for a 671 my goodness. Bus Grease Monkey worked on a set of these in boat a while back which were rated somewhere around 400hp as well. So perhaps slightly more long lasting, but considering the road going was intened to be something like.. what.. 300ish? if that? that is still quite high strung. I get what you mean with rating them conservatively. I keep the E-7 in my cabover downrated just like my uncle had it when he bought the truck, and it had well over 1million miles on it before he did a major rebuild and sold it to me. I uprated it slightly when I was working it commercially, but these days its retired and pretty much used to pull a modified holiday trailer and the occasional 45 foot repurposed refer for a local music festival.
road going 220 ;
@@simongilbert2704 Yeah the roots blown are something like that. TA variants are higher, like 275 or 285.
My 671 in my trawler has about 12,000 hours on it and isn't close to a rebuild. Only rated at 180 hp and maxs out at 1650 rpm. 2,000 hours is a short life, but thats big hp for a 671. Great donks.
Those old 2 strokes had So much potential. They NEVER Should have discontinued them! Emissions? BULL Shit, give'm a longer stroke, and slow'm down a little. They could run modern electronic injection, and a variable blower to Step Up with the throttle. Like WTF?
2700 rpm is wild my Cummins and cats run 2200 max
A real screaming jimmy!!
That thing is a monster! 500HP at that displacement for 2K hours is amazing!
Its a 2 stroke it can handle it, them 4 joke strokes are disposable junk anyways and sound awful.
Love these videos pity we couldn’t get outside noise happening because some of these motors sound awesome have outsid sound and note would be music to our ears 👌😎👍
Very impressive love your channel mate.
I hace a cuple of them in my 46 foot trawler and love them
In my experience Detroit does not like to be babied. Harder it works better it likes it and lives
Very nice!
Is there any demand for these engines today. ?
Robert Leftwich.... does the fact that there are Over 1.2 Million of them still in service world wide, tell you anything?
Oh yeah better than this 4 joke crap junk we get today! 2 stroke is the way to go.
time for paint !
Someone told me I should try to fit a v 6 71 into my d5n dodge instead of a v 6 53 is there much difference in size
The 671 is probably twice the weight and size.
3-53 in an old truck?
Only 2000hrs ... assume that's from extreme duty mentioned.
A shame Detroit hadn't continued development of a 2 stroke diesel line.
Fucking EPA and others are bought and paid for...Otherwise I believe 100MPG Autos and light trucks would exist.
I hate these 4 jokes in cars/trucks and these ugly 4 joke stupid looking expensive out boards they can keep them. I got a 4L v8 johnson small block 2 stroke and an turbo 8v92. Both are running with BRP XD-100 etec oil.
From what I have seen the 2 stroke opposed piston engine might be bought back thanks to modern technology so maybe the old commer knocker was a bit ahead of its time
Fairbanks-Morse 8 1/8!
charlesangell_bulmti..... Detroits biggest mistake was not further developing the 6-110/6-110T, instead of dropping it, in 1965. They Completely mis-read the future hp needs of the trucking industry and the "simplicity" of the inline 6. They're dyno cell tests had them up to 750hp @ 2350!! Even at 350hp in 1963, they were a full Nine years ahead of Cummins, when they released the NTC - 350 "small cam".
What injectors & cam timing?
7025 injectors std gt advance cam
@@dynosmith2187 thank you. That is impressive, finally some one that knows the difference between gear train timing & cam timing .!!! . I have a v-12 71 tta bypass blower with cleam cam technology supposedly tier 2 with their injectors 7495 dynoed 650 hp want to push it further .
@@ruxoneto6560.... We were pushing 2500hp & 3000 lbs ft of torque with the 12 (series 71) in the Sled puller (74 KW, ext. hood) and turning it at 4000 - 4,200. Over 11,000 hooks on the sleds over the years... and only spun one main bearing during a pull in 2006! PS: Did I mention that it had 1.6M miles on it when it was "retired" to full time sled pulling (NTPA and ECPA, plus many county fair pulls)!! Two degrees advanced cam timing is all you can go.
What the Vast majority of people Do Not understand with these engines (Series 71), is that valve opening Begins at just 88 degrees of crankshaft rotation from TDC.... What should That Fact, alone tell you (meaning Anyone)?... and they think that their big inch, long stroke, Cats, Cum-a-parts, Macks, etc... are impressive!! Ignorance can Really be Blissful!! lol
@@Romans--bo7br what injector do you have in it .
@@ruxoneto6560... "Hand built" 240cc.... but, it takes a Lot more than "just" big injectors to make it all work. DD had a 6-71"x" on the dyno in one of their "back room" test cells, in 1969/70, that was developing 743 hp.