[popolino77]

I heard the 2015 kia forte koup and 5 sx uses a twin scroll turbo, is that true ? And is a twin scroll turbo and a twin turbo the same thing ?

 

[Forte5]

As far as I know it is a twin scroll turbo. Twin turbo is having 2 turbos on your car like a twin turbo supra

 

[Markus]

Taken from the Kia Canada Forte 5 section of their website:
...And you’ll feel it when you open up its available 1.6-litre, twin-scroll turbocharged GDI engine.

So yes, it is a twin scroll. As for what that means, have a read here: https://en.wikipedia.org/wiki/Turbocharger#Twin-scroll

As Forte5 says, twin turbo typically means there are two turbo's, as opposed to one.

 

[schizorazgriz]

I have done some reading as I always do when these types of questions pop up on here. Lol

A "scroll" on a turbo is just the port and pathway that accepts exhaust gasses from the header and delivers them to the hot side turbine. So a twin-scroll turbo has two scrolls that accept exhaust gasses from specific cylinders. This promotes "scavenging" which in turn helps with a cleaner charge and lower peak cylinder temps which allows for more advanced timing and consequently more power. When the positive pressure being released from the cylinder as the exhaust valves open pulls the gasses from inside of the cylinder with them; it can be aided by the vacuum created by exhaust gasses leaving the headers causing an increase in efficiency. This is known as "Scavanging" or at least this is my new found understanding of it lol. It can be so efficient that it can even aid in pulling air from the intake into the cylinder for the duration of the cycle that both the exhaust and intake valves are open.

Please feel free to add or correct anything I messed up. Always in the pursuit of knowledge!

 

[valleyracer]

Twin turbo on a 4 cylinder engine would be a little odd. ONE turbo charger is generally used PER bank of exhaust cylinders. So Poppolino and Forte 5 you have some nomenclature confusion. Schizorrazgriz is quite close. The set up on these engines is really ideal. The spinning of the turbo "shaft" on the Kia set up (driven by exhaust) has, on the intake side, another impeller (thus twin scroll) that helps pull in intake air at a higher velocity and density (terms are LOOSELY defined). This is what an engine always want - LOTS of air.
I just sold my very thrusty SRT4 ACR - and can't wait to get a 2016 SX. I'll contribute mightily to the suspension, brakes and intake arena on this forum
Look here:

 

[schizorazgriz]

ValleyRacer I think you have a typo when describing what makes a turbo single-scroll or twin-scroll. A scroll on a turbo is a pathway not a shaft. The term twin scroll comes from the fact that exhaust gases are seperated and funneled into these scrolls seperately for more efficiency. All turbochargers should have a hot side turbine that drives an intake side impreller. That is their basic premise whether it is a single or twin scroll turbo.

Just remember scroll=place between headers and turbine.

 

[Scoobdude]

Twin turbo 4 cylinder, look at subaru.....

 

[Forte5]

Twin turbo 4 cylinder, look at subaru.....

Now that's a monster lol!

 

[schizorazgriz]

I wonder how a twin turbo setup would do if each were dedicated to two cylinders.

If you look at it like that I can definitely see how you could confuse twin-scroll with twin-turbo.

 

[Playwithmymind]

I wonder how a twin turbo setup would do if each were dedicated to two cylinders.

If you look at it like that I can definitely see how you could confuse twin-scroll with twin-turbo.

OK then how about doing a twin twin scroll turbo setup on our little 1.6L. Each cylinder would have it's own chamber to the turbine but to achieve the scavenging effect on the right cylinder it would be a interesting header.

 

[schizorazgriz]

OK then how about doing a twin twin scroll turbo setup on our little 1.6L. Each cylinder would have it's own chamber to the turbine but to achieve the scavenging effect on the right cylinder it would be a interesting header.

Man imagine trying to fit all that back there! Let alone build a jungle of pipe to hook it all up lol

New question now though... would running two turbos put too much strain on the 1.6l? I mean as far as having enough umph to push them in order to even see a benefit from it. I must do some more research on how much of a load a turbo of a given size puts on a motor and what changes when you bump up the number of turbos. Surely it is terribly impractical!

 

[Scoobdude]

We would also need to know if it's going to be a sequential turbo set up our not.

The twin turbo idea is alot easier on subarus due to the boxer design and short but wide motor. Also it seems the one they did twin turbo from the factory was a legacy b4 back in 93 to 96 with 280hp (Japanese restriction)

 

[schizorazgriz]

Moral of the story is.... The turbo in our cars is a twin-scroll and we do not have a twin turbo set up.

 

[Forte5]

Moral of the story is.... The turbo in our cars is a twin-scroll and we do not have a twin turbo set up.

Exactly my thinking!

 

[2014:1.6lT]

Twin turbo on a 4 cylinder engine would be a little odd. ONE turbo charger is generally used PER bank of exhaust cylinders. So Poppolino and Forte 5 you have some nomenclature confusion. Schizorrazgriz is quite close. The set up on these engines is really ideal. The spinning of the turbo "shaft" on the Kia set up (driven by exhaust) has, on the intake side, another impeller (thus twin scroll) that helps pull in intake air at a higher velocity and density (terms are LOOSELY defined). This is what an engine always want - LOTS of air.
I just sold my very thrusty SRT4 ACR - and can't wait to get a 2016 SX. I'll contribute mightily to the suspension, brakes and intake arena on this forum
Look here:

That video was like better than porn.