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Thread: 3.0/3.2 V6 Dual Ram effect

  1. #1
    Regular Member gtr1000's Avatar
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    Vehicle : Insignia

    Trim : Sri

    Engine : 140 Ecoflex S/S

    Year : 2013

    Default 3.0/3.2 V6 Dual Ram effect

    From what I've read about these engines, VX designed them to be sort of economical below 4k rpm by using a dual ram air intake system. As we've probably all noticed, hit 4k rpm and these cars really fly when the ram air flaps open. I guess these flaps are opened by vacuum or similar as there's no electrical wiring as such on the flap "motors".

    So if we didn't want the economy but max power below 4k, how would you keep the ram air flaps open (take the top off the plenum chamber to see) at say 1500 rpm?

    What I'm thinking might be a load of garbage but I think it's worth a thought.

  2. #2
    Regular Member john-d's Avatar
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    why you would want a v6 using more fuel id never know lmao

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    Regular Member Eirik's Avatar
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    You can just take away the whole dual ram-system, weld a pipe and get som hoses instead of it. Iv'e never tryed it myself, but know it have been done with sucess on some omegas.

  4. #4
    Full Member Big Sig's Avatar
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    Quote Originally Posted by john-d View Post
    why you would want a v6 using more fuel id never know lmao
    You don;t buy one for mpg to start with

    Quote Originally Posted by Eirik View Post
    You can just take away the whole dual ram-system, weld a pipe and get som hoses instead of it. Iv'e never tryed it myself, but know it have been done with sucess on some omegas.
    Any links?
    Now I need a turbo to keep up!

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    Regular Member john-d's Avatar
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    tbh if this works id be interested too, was just asking

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    You will loose all low down torque if its wedged open.

    The idea is low air more fuel at low revs qives more torque, loads of air compared to fuel gives higher bhp, or something like that.

    If you get a noticable change then its not working properly.

    On my old MV6 it was obvious , eventually tracked it down to one of the vacum hoses being the wrong way round and the flap wasn't working properly, can feel it in my 2.5 but as its working as it should its not so bad.

    If you hunt round Omega Owners Forum there is an article on there on how the multi rams work and why they work as they do, slightly different layout but you get the idea

    Infact found the link:- CLICK ME

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    Regular Member Eirik's Avatar
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    Quote Originally Posted by Big Sig View Post
    You don;t buy one for mpg to start with



    Any links?

    Sorry, only on Norwegian and it's on a closed/members only forum.

  8. #8
    Regular Member gtr1000's Avatar
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    Engine : 140 Ecoflex S/S

    Year : 2013

    Default

    Quote Originally Posted by stoneshed View Post
    You will loose all low down torque if its wedged open.

    The idea is low air more fuel at low revs qives more torque, loads of air compared to fuel gives higher bhp, or something like that.

    If you get a noticable change then its not working properly.

    On my old MV6 it was obvious , eventually tracked it down to one of the vacum hoses being the wrong way round and the flap wasn't working properly, can feel it in my 2.5 but as its working as it should its not so bad.

    If you hunt round Omega Owners Forum there is an article on there on how the multi rams work and why they work as they do, slightly different layout but you get the idea

    Infact found the link:- CLICK ME
    Oh well, so much for my idea . I'll go away now and lock all the doors.

  9. #9
    Regular Member mark_647's Avatar
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    Not bad thinking though !!

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    Regular Member VXR_DV's Avatar
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    As said, nice idea, but VX thought about that one already.

    At low speeds, the flap thing stays closed, air travels faster thru the "narrow loop", and you get more torques.

    At higher speeds, you need better breathing: max volume of air is what's needed, so the flap opens and u get max airflow.

    If you mess around with either of the above: fiasco. If the valve fails to open at hi rpm, the top end will disappear. If it sticks open, you won't have any low down grunt.

    I had this system on my Vectra 2.5 SRi V6, and it worked well.

    dv.

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