Turbos on 1 litre engines

[aveatry]

Since the turbo is driven by the speed of the exhaust gases, what you say could be theoretically correct, but likely false in practice. Engineers will want to get the power available asap, especially with such a small engine as yours, so it sounds like a poor design. Some engines are now using a small electric fan ( like in a computer ) which can spin up to 100 000 rpm in a second or two, to bridge the time until the full-size exhaust-turbo can accelerate to full speed.

Crikey its like when someone starts taking tablets - they have to take another one for the side effects of the first one and then one for that - and so on

 

[aveatry]

I think you are absolutely wrong there. "Peak oil" has been proven to be wrong numerous times.

Wiki.
Over the last century, many predictions of peak oil timing have been made, often later proven incorrect due to increased extraction rates.[9] M. King Hubbert introduced comprehensive modeling of peak oil in a 1956 paper, predicting U.S. production would peak between 1965 and 1971, but his global peak oil predictions were premature because of improved drilling technology.[10] Current forecasts for the year of peak oil range from 2028 to 2050.[11] These estimates depend on future economic trends, technological advances, and efforts to mitigate climate change.[8][12][13]

It will never "run out" as the earth itself creates it.

 

[Mottie]

Since the turbo is driven by the speed of the exhaust gases, what you say could be theoretically correct, but likely false in practice. Engineers will want to get the power available asap, especially with such a small engine as yours, so it sounds like a poor design. Some engines are now using a small electric fan ( like in a computer ) which can spin up to 100 000 rpm in a second or two, to bridge the time until the full-size exhaust-turbo can accelerate to full speed.

VW had the 'twincharger' 1.4 engine that they fitted to some Polo's. Supercharged AND turbocharged! Supercharged for low end revs and then that faded out as the revs increased and the turbo kicked in.

 

[Harry Bloomfield]

Since the turbo is driven by the speed of the exhaust gases, what you say could be theoretically correct, but likely false in practice. Engineers will want to get the power available asap, especially with such a small engine as yours, so it sounds like a poor design. Some engines are now using a small electric fan ( like in a computer ) which can spin up to 100 000 rpm in a second or two, to bridge the time until the full-size exhaust-turbo can accelerate to full speed.

Mine is an BMW M45 direct injection turbo diesel. In the early days of small turbos, such as the early SAAB, they suffered turbo lag - until the revs built up, the turbo wasn't very effective, so you got nothing, then a sudden kick in the back, as the turbo began to function.

More modern diesel turbo's, are much more gradual. Mine, in factory ECU trim, had a slight delay - quite intimidating, when trying to pull out into traffic and on roundabouts, was it going to pull or not. Reprogramming the ECU's MAP, somehow sorted that out, and the acceleration is now very predicatable, and progressive, plus a lot more BHP available to use.

 

[Avocet]

I think you are absolutely wrong there. "Peak oil" has been proven to be wrong numerous times.

Wiki.
Over the last century, many predictions of peak oil timing have been made, often later proven incorrect due to increased extraction rates.[9] M. King Hubbert introduced comprehensive modeling of peak oil in a 1956 paper, predicting U.S. production would peak between 1965 and 1971, but his global peak oil predictions were premature because of improved drilling technology.[10] Current forecasts for the year of peak oil range from 2028 to 2050.[11] These estimates depend on future economic trends, technological advances, and efforts to mitigate climate change.[8][12][13]

The fact remains though. If it wasn't a diminishing resource, why are we laying waste to tens of thousands of square miles, trying to wring the last dregs of the stuff out of shale and tar sands? Surely we'd still be raking in the low-hanging fruit that was easy to get to?

 

[Avocet]

Mine is an BMW M45 direct injection turbo diesel. In the early days of small turbos, such as the early SAAB, they suffered turbo lag - until the revs built up, the turbo wasn't very effective, so you got nothing, then a sudden kick in the back, as the turbo began to function.

More modern diesel turbo's, are much more gradual. Mine, in factory ECU trim, had a slight delay - quite intimidating, when trying to pull out into traffic and on roundabouts, was it going to pull or not. Reprogramming the ECU's MAP, somehow sorted that out, and the acceleration is now very predicatable, and progressive, plus a lot more BHP available to use.

All the early turbo cars were like that. Even down to the little Renault 5 turbos. Absolutely chronic turbo lag. However, manufacturers realised that bigger wasn't always better and that a small turbo had less inertia so the vanes spun-up faster. Plus, of course, the early ones had a simple spring-loaded wastegate. Modern management systems can control the wastegate in a much more sophisticated way (and variable vanes) to keep the turbo spinning even when its not providing much boost.

 

[Avocet]

It will never "run out" as the earth itself creates it.

 

[aveatry]

Abiogenic petroleum
Its just chemistry, hydrogen and carbon. Saturn's moon Titan is flooded with it.

 

[Avocet]

Abiogenic petroleum
Its just chemistry, hydrogen and carbon. Saturn's moon Titan is flooded with it.

Yeah... I think that's been debunked plenty of times now. If it were true, we wouldn't be wasting massive amounts of resource trying to extract it from shale and tar sands, would we? We'd be moving on to the next new "gusher" that the planet had thoughtfully provided...

 

[aveatry]

Yeah... I think that's been debunked plenty of times now. If it were true, we wouldn't be wasting massive amounts of resource trying to extract it from shale and tar sands, would we? We'd be moving on to the next new "gusher" that the planet had thoughtfully provided...

No it dosent gush it seeps and flows .That's because it follows faults in the rock and gets trapped when it reaches rocks it cannot get through. And in some places it just ****es out the ground. So you cannot just find it with the same ease everywhere.
A petroleum seep is a place where natural liquid or gaseous hydrocarbons escape to the Earth's atmosphere and surface, normally under low pressure or flow. Seeps generally occur above either natural terrestrial or underwater petroleum accumulation structures (e.g., sandstones, siltstones, limestones, dolomites).[1][2] The hydrocarbons may escape along geological layers, or across them through fractures and fissures in the rock, or directly from an outcrop of oil-bearing rock.

low pressure or flow. Seeps generally occur above either natural terrestrial or underwater petroleum accumulation structures. See what it said there FLOW and ACCUMULATION - its constantly being produced.
The big gush is the release of pressure when the rock seal is pierced and releasees all that built up pressure from the constant supply.

 

[Old Salt]

I get the idea behind smaller IC engines but Governments of all persuasions are paying lip service to climate change/pollution. Why do they still allow all the plumes of smoke and flames as footballers, rugby teams run out, score a goal/try. Firework displays for special events/new year and thousands of other situations all contribute to climate change and pollution yet they want to ban diesel cars. Perhaps they should start to cut down on industry, air travel, dirty buses and trucks.

 

[aveatry]

I get the idea behind smaller IC engines but Governments of all persuasions are paying lip service to climate change/pollution. Why do they still allow all the plumes of smoke and flames as footballers, rugby teams run out, score a goal/try. Firework displays for special events/new year and thousands of other situations all contribute to climate change and pollution yet they want to ban diesel cars. Perhaps they should start to cut down on industry, air travel, dirty buses and trucks.

Not to mention formula 1 car racing.

 

[Brigadier]

Abiogenic petroleum
Its just chemistry, hydrogen and carbon. Saturn's moon Titan is flooded with it.

Why aren't you filling up there then?

 

[aveatry]

Why aren't you filling up there then?

https://www.esa.int/Science_Exploration/Space_Science/Cassini-Huygens/Titan_s_surface_organics_surpass_oil_reserves_on_Earth

 

[Avocet]

No it dosent gush it seeps and flows .That's because it follows faults in the rock and gets trapped when it reaches rocks it cannot get through. And in some places it just ****es out the ground. So you cannot just find it with the same ease everywhere.
A petroleum seep is a place where natural liquid or gaseous hydrocarbons escape to the Earth's atmosphere and surface, normally under low pressure or flow. Seeps generally occur above either natural terrestrial or underwater petroleum accumulation structures (e.g., sandstones, siltstones, limestones, dolomites).[1][2] The hydrocarbons may escape along geological layers, or across them through fractures and fissures in the rock, or directly from an outcrop of oil-bearing rock.

low pressure or flow. Seeps generally occur above either natural terrestrial or underwater petroleum accumulation structures. See what it said there FLOW and ACCUMULATION - its constantly being produced.
The big gush is the release of pressure when the rock seal is pierced and releasees all that built up pressure from the constant supply.

Yours is, (I'll use a euphemism here), a "minority view", shall we say?

Abiogenic petroleum origin - Wikipedia

en.wikipedia.org

Good luck...