Thanks Smugsey! Your reply to TheMetalCottage about how the diesel 2-stroke works answers something that has been nagging me for a while now. For a 60 year old tractor, that Oliver sounded - and looked - marvellous! Greetings from New Zealand.
I believe what he's meaning to say is that the purpose is different. The blower on these engines is just there to provide some pressure to blow the exhaust out and get good fresh air in, with no crank case pressure. A 2 stroke gas engine the fuel and air goes into the case and the piston falling pressurizes it to blow it into the cylinder, on a diesel the fuel is injected during compression, therefore the block has oil, and you need pressure or it would just suck its exhaust back in.
@2strokedetroitdiesel you are incorrect, detroit diesel WAS gm diesel until the mid 60's. So the description for this video is correct, as it contains an agricultural vehicle made by oliver with a 2 stroke diesel engine made by general motors detroit diesel engine division. The NA version of said engine uses the blower for intake air and exhaust scavinging producing no boost, the T/TA versions use a turbo or turbo and aftercooler to create boost and raise the power rating.
@TheMetalCottage It's a little bit different than a small-engine type 2-stroke you'd find in a weed eater or snowmobile. These have a blower/supercharger to force the air in through a port for intake/compression stroke, and they have exhaust valves for the exhaust/power stroke. So, the crankcase is sealed off from the rest of the engine and is able to be lubricated in the same way a typical 4-stroke engine is - oil pump and splash lubrication.
I'm not sure if this one has a turbo or not... but all the GM 2-stroke diesels have a supercharger on them, that's where a lot of the screaming noise comes from!
A roots type blower is also known as a supercharger, because it has a mechanical drive. It's really just a scavenge pump, but technically speaking it's still a supercharger.
Probably about 2500 rpm. Multi cylindered 2 stroke diesels always sound like they are revving far faster than they are. There was once in the UK a Foden truck, powered by an inline 6 cylinder 2 stroke diesel of 4 litres. Maximum power was developed at 2500, although it sounded like 5000!!
@BIGblocks4life you got that backwards, they have exhaust valves. they do not have intake valves. the ports in the liners are the intake valves. and the silver series ran a blower and a turbo...... i have been building them for years.
@MrCoolchips Technically it is called MFWD or Mechanical Front Wheel Drive, some also refer to it as FWA or Front Wheel Assist. Yes it is 4x4 as power is being directed to all four wheels.
When you consider though, that the Foden 2 stroke had a capacity of only 4 litres to produce an output of 175 bhp @ only 2500, - compared to a similar power from a 10 litre Gardner 4 stroke, it's not entirely surprisng that they grew a little tired from constantly having their necks wrung! lol
I don't think there is much if any positive manifold pressure from the supercharger on these. I couldn't tell you for sure, though. Since it is a 2-stroke engine it needs some type of scavenging, most use the crankcase as the scavenge pump (snowmobiles, chainsaws, etc.) but these have the supercharger.
Old GM 2-stroke diesels have superchargers to get enough air to the engine right? Not to provide boost right? That what I have hear, but never gotten a direct answer.
To continue my last, if you made the blower on these much more powerful you'd just be wasting engine power, when the blower is forcing the exhaust out of the engine it has basically no back pressure, because the exhaust valve is open, while the intake port is open. So the pressure just blows on through.
@2strokedetroitdiesel You make no sense. Detroit diesels were GM produced. And yes, that blower is still considered a supercharger. It's pushing more than normal aspiration. Common sense.
Drove a Detroit powered FWD 1950 on the family farm when I was a kid. Always had that unique roar. We also had two perkins powered 1850’s
We also had a 1850 with a Perkins.
Thanks Smugsey! Your reply to TheMetalCottage about how the diesel 2-stroke works answers something that has been nagging me for a while now. For a 60 year old tractor, that Oliver sounded - and looked - marvellous! Greetings from New Zealand.
Farmer across the road from me has an old Ollie like that, I love when he has that thing in the field! Sounds great!
Farm wife's loved Detroit's because they could tell if their husband was working.
beautiful tractor, love that MFWD, Oliver was way ahead of the competition on that one.
Wish I had that thing to move snow with!! What a hoss!!!!!
I believe what he's meaning to say is that the purpose is different. The blower on these engines is just there to provide some pressure to blow the exhaust out and get good fresh air in, with no crank case pressure. A 2 stroke gas engine the fuel and air goes into the case and the piston falling pressurizes it to blow it into the cylinder, on a diesel the fuel is injected during compression, therefore the block has oil, and you need pressure or it would just suck its exhaust back in.
@2strokedetroitdiesel you are incorrect, detroit diesel WAS gm diesel until the mid 60's. So the description for this video is correct, as it contains an agricultural vehicle made by oliver with a 2 stroke diesel engine made by general motors detroit diesel engine division. The NA version of said engine uses the blower for intake air and exhaust scavinging producing no boost, the T/TA versions use a turbo or turbo and aftercooler to create boost and raise the power rating.
wow, and I thought the 830 John Deere and 1256 IH I grew up on were eardrum wreckers! Pretty strong Oliver!
@TheMetalCottage It's a little bit different than a small-engine type 2-stroke you'd find in a weed eater or snowmobile. These have a blower/supercharger to force the air in through a port for intake/compression stroke, and they have exhaust valves for the exhaust/power stroke. So, the crankcase is sealed off from the rest of the engine and is able to be lubricated in the same way a typical 4-stroke engine is - oil pump and splash lubrication.
I'm not sure if this one has a turbo or not... but all the GM 2-stroke diesels have a supercharger on them, that's where a lot of the screaming noise comes from!
@possumtail Yes, they made a 1950T and the 1950 was also available with the GM 2-stroke 4-53 diesel.
I saw that thing pull at Rollag. It was sweeeeet
mwstr rollog i saw him pull this year pretty neat
that old tractor just rocks, classic case of
irrestable force meets emovable object
guess who wins this one boys !!!!!!
Yeah, two strokes are king !
what a beast! I thought our 830 jd and 1256 international damaged ear drums, but not like that thing
A roots type blower is also known as a supercharger, because it has a mechanical drive. It's really just a scavenge pump, but technically speaking it's still a supercharger.
Probably about 2500 rpm. Multi cylindered 2 stroke diesels always sound like they are revving far faster than they are. There was once in the UK a Foden truck, powered by an inline 6 cylinder 2 stroke diesel of 4 litres. Maximum power was developed at 2500, although it sounded like 5000!!
lil 453 Screamin jimmy sounds sweet olivers are rare here in West Tn
@BIGblocks4life you got that backwards, they have exhaust valves. they do not have intake valves. the ports in the liners are the intake valves. and the silver series ran a blower and a turbo...... i have been building them for years.
Love that Detroit!
thats a good sounding 4-53 detroit
@MrCoolchips Technically it is called MFWD or Mechanical Front Wheel Drive, some also refer to it as FWA or Front Wheel Assist. Yes it is 4x4 as power is being directed to all four wheels.
When you consider though, that the Foden 2 stroke had a capacity of only 4 litres to produce an output of 175 bhp @ only 2500, - compared to a similar power from a 10 litre Gardner 4 stroke, it's not entirely surprisng that they grew a little tired from constantly having their necks wrung! lol
I don't think there is much if any positive manifold pressure from the supercharger on these. I couldn't tell you for sure, though. Since it is a 2-stroke engine it needs some type of scavenging, most use the crankcase as the scavenge pump (snowmobiles, chainsaws, etc.) but these have the supercharger.
Old GM 2-stroke diesels have superchargers to get enough air to the engine right? Not to provide boost right? That what I have hear, but never gotten a direct answer.
Also, they have "GM" cast into either the block or the blower as I recall...
@JtsGreene huh? a roots blower is a twin screw supercharger
This should be the new tornado warning
Smooth great running engine.
Sounds GREAT!
right... and marine propulsion, although a v16 EMD engine would probally burn less that twin 12v71 jimmys bolted together...
Suprisingly low smoke. How does it lubricate cylinders? Is diesel fuel thick enough?
@2strokedetroitdiesel yes it is, off the timing gears.
* all the way up to the 16v149TTA, and 24v71TTTT (looks weird, but in some special configurations people do build quad-turbo V-24 engines : )
@MRcubcadet107 Not mine. I'm sure there's one for sale somewhere...
how high is he twisting that 4cyl detroit
@MrJosephMopar Somewhere between 2000 and 2500 rpm I would assume.
@2strokedetroitdiesel GM owned Detroit thats a well known fact its cast into the engine.
Interesting...
Thanks for explaining.
Cool, thanks for the info!
Detroit Diesel power KICKS ASS!!! YEEHAA!!!
I believe so.
Walk on, big green o!
good pull
To continue my last, if you made the blower on these much more powerful you'd just be wasting engine power, when the blower is forcing the exhaust out of the engine it has basically no back pressure, because the exhaust valve is open, while the intake port is open. So the pressure just blows on through.
a non turbocharged detroit is considered a N/A engine, although they still have the blowers
4x4 ?
is that yours?would ya sell it
Oliver was a great product, too bad they got sold out.
is it 4X4?
Tanner Warkentin yes, all 4 wheels pull. MFWD is Mechanical Front Wheel Drive.
@smgussey bout 2600 is stock. mines at 2800
oliver is nice
@2strokedetroitdiesel
You make no sense. Detroit diesels were GM produced. And yes, that blower is still considered a supercharger. It's pushing more than normal aspiration. Common sense.
DETROIT POWER!
What sled? haha
GM never made a 4 stroke all 2 2-71
4,6,871 all the way up to 16-92S
8.2 fuel pincher and the Series 60
2400 stock? Noo that's doesn't sound right at all.