Comments by "Titanium Rain" (@ChucksSEADnDEAD) on "Variable Twin Scroll Turbocharger - The Future Of Gasoline Turbos?" video.

  1. +Filipe Amaral And I guess that when only the "red" turbo is connected, the "orange" is extra mass that introduces parasitic losses.
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  2. Nah, there's a real big trend of small turbo diesel engines replacing larger NA ones. Logic being that when driving carefully you get the gas mileage of a small engine, but when you need the power it's there. Most people only need it when overtaking, and the turbo is spooled by then. When electric takes over, there's no need for a NA engine.
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  3. Size, didn't get a real sense of scale but it just looks bulky.
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  4. Ricardo Kelm does the velocity increase? I mean, if the diameter is reduced you can increase velocity of a fluid but I'm thinking about turbines and you want pressure. And because the exhaust moves in "pulses", you do have a greater input of gasses but I don't think they design it so that the pulses "collide" in the exhaust. Basically it fills in the gaps (which still produces more work but no more pressure or velocity). The turbines aren't even that big, I have no idea how much the inertia factors in.
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  5. You get all the exhaust "pulses" hitting the same turbine, which accelerates it faster.
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  6. Billy Phillips One side is a low pressure turbine and another is a high pressure turbine, it's how we simplify calculations in steam turbines. It's the same shaft, but we partition them depending on their properties.
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  7. They use a variable geometry twin scroll. It has to be 3D printed because the inside is too complex to mass produce.
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  8. Billy Phillips That's true, but I don't know how many twin scroll turbos are out there. I had no industry standard to compare them to, so I named a drawback. In this version, when the orange is closed off the red gets the optimal flow, but the orange side is literally dead weight. For better or worse, even the inefficient turbo for that rpm range is getting spooled in a normal twin scroll. 
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  9. CJSchecter96 making a hybrid whose target audience is the people who like hybrids the least is a good way to piss off shareholders. That's why. For starters I doubt it would appeal to those who like NA engines, they'd sooner get a turbo than electric. A "car guy" who actually needs the low end torque is probably the same kind of person who wouldn't want the weight of batteries holding back his car.
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  10. Weird, I also thought about this when looking up twin turbo systems. Except it still wouldn't be feasible because one of the turbos was VGT, which in hindsight it ridiculously overkill and unnecessary.
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