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wats the difference, twin scroll, closed deck

 
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Old 04-15-2003, 01:21 PM
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Talking wats the difference, twin scroll, closed deck

hey guys. i was wondering.. wat is the difference between twin turbo, twin scroll and closed deck turbo, and biturbo which the audi TT has.. i here these terms often but dont know wat it means. someone please enlighten me
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Old 04-15-2003, 01:26 PM
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Twin Turbo is the same as the bi-turbo. It means the car has 2 turbo's.

Twin scroll turbo means it has separate passages in the turbine housing separating the opposite cylinder banks to increase spool up and reduce back pressure.

Closed deck turbo doesn't exist. There is a closed deck block. It means the the cylinders are secured to the side of the block.
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Old 04-15-2003, 01:48 PM
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so what kind of turbo will the sti have? twin scroll?
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Old 04-15-2003, 01:59 PM
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The USDM STi will not have the twin scroll turbo. The JDM STi does have the twin scroll turbo. The twin scroll is supose to aid in response times for the turbo.
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Old 04-15-2003, 02:13 PM
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Originally posted by STiDreams
The USDM STi will not have the twin scroll turbo. The JDM STi does have the twin scroll turbo. The twin scroll is supose to aid in response times for the turbo.
I don't know the type of turbo yet, trying to find out. but all I can say is the damn thing sure doesnt seem to have any lag. Probably a factor of the avcs and the low rpm in which it kicks in.
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Old 04-15-2003, 02:43 PM
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what does t3/t4 turbo mean??
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Old 04-15-2003, 09:47 PM
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Originally posted by O4STi
we dont have the JDM twin-scroll turbo but in the USDM STi there is the AVCS in place of that which helps with low end power
AVCS is also present in JDM STi.
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