Does the 2015 forte 1.6 turbo use a twin scroll turbo ?
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Does the 2015 forte 1.6 turbo use a twin scroll turbo ?

This is a discussion on Does the 2015 forte 1.6 turbo use a twin scroll turbo ? within the Kia Forte Turbo Performance forums, part of the Kia Forte Turbo Garage category; I heard the 2015 kia forte koup and 5 sx uses a twin scroll turbo, is that true ? And is a twin scroll turbo ...

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Thread: Does the 2015 forte 1.6 turbo use a twin scroll turbo ?

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    Senior Member popolino77's Avatar
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    Does the 2015 forte 1.6 turbo use a twin scroll turbo ?

    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 ?

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    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
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    Senior Member Markus's Avatar
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    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.
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    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!
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    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.
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    Senior Member schizorazgriz's Avatar
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    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.
    Last edited by schizorazgriz; 09-09-2015 at 05:37 AM.

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    Twin turbo 4 cylinder, look at subaru.....
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    Quote Originally Posted by Scoobdude View Post
    Twin turbo 4 cylinder, look at subaru.....
    Now that's a monster lol!
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    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.
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    Quote Originally Posted by schizorazgriz View Post
    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.
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