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Thread: Swirl flaps

  1. #1
    Regular Member the-wizard's Avatar
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    Vehicle : vectra-c

    Trim : sri

    Engine : cdti

    Year : 2004

    Mileage : 98,000

    Default Swirl flaps

    can anyone with a cdti 150 tell me if when reved light'ish (tickover to 2-2500 rpm) if the swirl flap rod moves, the reason i ask is because im sure mine never use to, and ive never noticed it before, obviously you would have to get someone to do this while you watched, i thought it only worked with boost!, for the record the engine was at running temp, and was working fully with any amount of revs ???

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    Vehicle : Golf 7

    Trim : GTD

    Engine : 2.0 TDI 184PS

    Year : 2014

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    Default

    Mines does not move at all - although it broke off the motor link doesnt.

    It only works under 5 Degrees as it is for cold starting m8.

    Gazza4

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    Regular Member the-wizard's Avatar
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    Vehicle : vectra-c

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    no mate it works all the time with engine boost, but i was'nt sure wether it worked with low engine revs as im sure it never used to?

  4. #4
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    Default

    Gazza 4's reply is rubbish (sorry!). The inlet should open at about 2-2.5k. It's got fig-roll to do with temperature and even less to do with boost.

    The swirl flaps close at low revs to close one of the two inlet ports, which makes the incoming air swirl around the combustion chamber. At higher revs, the swirl isn't needed, so the flaps open letting both inlet ports do their thing.

    Same idea as Twinport on the petrol engines, and the older dual-RAM on the old V6 and I-6 lumps in Omega/Carlton.

    More details at:
    http://en.wikipedia.org/wiki/Variabl...ntake_manifold

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    Vehicle : Golf 7

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    Engine : 2.0 TDI 184PS

    Year : 2014

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    Quote Originally Posted by _ZS_ View Post
    Gazza 4 and the-wizard's replies are both rubbish.
    A bit strong there - I was told by a mechanic that is it to with pre-heating and Wikipedia - seriously? Thats your basis of information and sharpness

    Gazza4

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