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Old 03-28-2018, 09:58 AM   #85
Ryephile
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That's why there's a class-action lawsuit against BMW, it's a terrible marketing name.

"Twin-Power" is on the 1.5L 3-cyl single-scroll single-turbo, because it's also Valvetronic and DI. The most recent engines that are still under the corporate umbrella of "Twin-Power", such as the quad-turbo Diesel, don't even bother putting the misleading nomenclature on the noise cover anymore.


Also, Diesel's are nearly always DI, except those weirdo designs with pre-combustion chambers. Most Diesel's nowadays are marketed as Common Rail to distinguish the very high rail pressure versus an older school "fuel distributor", but they're all still direct injection.
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Old 03-28-2018, 02:13 PM   #86
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Originally Posted by Ryephile View Post
That's why there's a class-action lawsuit against BMW, it's a terrible marketing name.

"Twin-Power" is on the 1.5L 3-cyl single-scroll single-turbo, because it's also Valvetronic and DI. The most recent engines that are still under the corporate umbrella of "Twin-Power", such as the quad-turbo Diesel, don't even bother putting the misleading nomenclature on the noise cover anymore.


Also, Diesel's are nearly always DI, except those weirdo designs with pre-combustion chambers. Most Diesel's nowadays are marketed as Common Rail to distinguish the very high rail pressure versus an older school "fuel distributor", but they're all still direct injection.
Yes, I forgot that is what Common Rail is. Thanks. I am not as well versed in diesel engines. I would imagine that DI would help in a diesel to more precisely control ignition timing, because the timing of the fuel spray can put the compression over the top causing the compression combustion.
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Old 03-28-2018, 02:23 PM   #87
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Yes, I forgot that is what Common Rail is. Thanks. I am not as well versed in diesel engines. I would imagine that DI would help in a diesel to more precisely control ignition timing, because the timing of the fuel spray can put the compression over the top causing the compression combustion.
Funny how several of the "newer" gasoline engine fuel economy technologies originated with diesel engines. Direct Injection, two-stage boosting, higher compression ratios, high pressure DI, decal fuel cutoff, I'm sure I'm forgetting a couple.
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Old 03-28-2018, 11:37 PM   #88
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I think it is a manufacturer defined difference without a distinction. For example, BMW describes engines with one twin-scroll turbo as being bi-turbo and use the brand name Twin-Power.
I always thought the "twin-power" mean that you had an ICE engine AND a turbo, hence the turbo is "helping" the engine and together, they are "twin power". I had a BMW and that was my understanding.
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Old 03-29-2018, 08:09 AM   #89
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I always thought the "twin-power" mean that you had an ICE engine AND a turbo, hence the turbo is "helping" the engine and together, they are "twin power". I had a BMW and that was my understanding.
As Ryephile has pointed out, BMW has blurred the meaning a lot over time. BMW had turbos long before starting to use the TwinPower name. They started using TwinPower at the same time that they started introducing twin-scroll turbos, so it was logical for people to connect the two.

Then at some point in time BMW said that TwinPower could mean a single twin-scroll turbo or two single-scroll turbos. Then they later said that it was a combination of turbo technology + direct injection (which they had already been doing for years) + Valvetronic (which was already on its 3rd or 4th generation by then). I think that what happened was they backed off on some of the planned applications of twin-scroll but didnít want to remove the TwinPower badge from vehicles that didnít have twin-scrolls. The whole turbo + DI + Valvetronic setup had been in place for years before the TwinPower name fell from the sky.
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Old 03-29-2018, 08:16 AM   #90
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JDN is now saying Cadillac will not share this engine with Corvette...
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Old 03-29-2018, 08:47 AM   #91
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There’s no reason for Corvette to use it. It weighs about as much as the LT4 but is down on power and torque.
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Old 03-29-2018, 09:19 AM   #92
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JDN is now saying Cadillac will not share this engine with Corvette...
That's what the 5.5 is for
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Old 03-29-2018, 11:52 AM   #93
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Thereís no reason for Corvette to use it. It weighs about as much as the LT4 but is down on power and torque.
But but but ... it has more technology! It MUST be better in every single possible way. I mean, just look at its specific output!
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Old 03-29-2018, 02:40 PM   #94
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But but but ... it has more technology! It MUST be better in every single possible way. I mean, just look at its specific output!
That sounds exactly like the reason a snobby high end buyer would say lol
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Lets keep it simple. ..
it has more power...its available power is like a set kof double Ds (no matter where your face is... theyre everywhere) it has the suspension to mame it matter...(
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