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Thread: BSR Optiflow for the 2.8 Engine!

  1. #1
    Regular Member luke4487's Avatar
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    Default BSR Optiflow for the 2.8 Engine!

    How do...

    After seeing a similiar thread on the 2.0T engine I wondered if anyone has fitted this to the 2.8.

    Have heard the airflow is better in the Saab engine bay than the Vec/Sig however I can't see it being much better. Definately looking into getting it. Heat soak isn't a drama as the heatshield goes flush with the bonnet near enough and it will still have the same air feed as the airbox... add in moving airflow and it shouldn't be a problem* (*Although rolling road would be affected).

    Not expecting to gain anything apart from engine sound. But I can't see any loss in power either. May also be looking into a larger intake to feed air into the heat shield housing.

    My only problem is... and I can't see why it would be different to the Saab... But what is to be done with the crank case vent pipe that goes to the air box?

    I have put both pics up. The Siggy engine bay, against the Saab engine bay with the modified Air intake... The offending pipe is marked.... Surely this same pipe is used on the Saab's? But what is done about it on fitting this kit? Anyone know?

  2. #2
    Regular Member luke4487's Avatar
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  3. #3
    Ex Vec-C Admin Deztroyer's Avatar
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    i cant see the MAF mounted on the Saab optiflow section either Luke

    0-Large smile ......every time it's driven

  4. #4
    Regular Member rushy's Avatar
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    Vehicle : SRi


    Engine : Z22SE (2.2 Petrol)

    Year : 2004

    Mileage : 137000

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    There's nothing stopping you just fitting an open K&N cone and making your own Shield, after all that's all that kit is. You could make a pattern out of cardboard and get a sheet metal place to cut and bend it for you. In fact you could get it made of carbon.

  5. #5
    Regular Member PORKBALLS29's Avatar
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    been thinking about this too. And i really dont think its going to be as simple as it looks. As Dez said there is no sign of maf on the saab picture plus as you said no crank case breather! Would love to fit one of these but a lot of modding to be done to make this fit and actually run on the car.

  6. #6
    Regular Member rushy's Avatar
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    Vehicle : SRi


    Engine : Z22SE (2.2 Petrol)

    Year : 2004

    Mileage : 137000

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    That's easy to sort out. Fit your MAF after the filter, add a silicone T into the ducting and fit your breather in there. THIS sort of thing. Or THIS.Oh yeah, Apiro do THESE as well (half way down the page).

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    Regular Member luke4487's Avatar
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    Quote Originally Posted by deztroyer View Post
    i cant see the MAF mounted on the Saab optiflow section either Luke
    Oooh bravo! How sloppy was I.. completely missed that. Mistook the other connection as being the MAF at a glance. Hmmm... Surely the Saab 9-3 isn't running without a MAF sensor though so there must be a sneaky trick to the fitment. The same with the engine breather...

    I emailed BSR direct anyhow, we shall see if they give me an answer.

    I would prefer to have the premade kit, with the decent fitting heatshield than a self fabricated one. Although I would of been adding insulating foam along the top rim and any spacing to increase insulation I can't see it being much different to the standard airbox as letting in heat...

  8. #8
    Regular Member PORKBALLS29's Avatar
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    We have discussed that if these were a go then the VXR boys would be all over them, but from what I can gather they ruled these out as they are not rated for high enough bhp, as they are looking for a filter kit rated to 450bhp for some reason?? So it may work, it may not. I cant see the Saab being that much different that you couldn't get it working on the VX engine.

  9. #9
    Regular Member luke4487's Avatar
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    Quote Originally Posted by PORKBALLS29 View Post
    We have discussed that if these were a go then the VXR boys would be all over them, but from what I can gather they ruled these out as they are not rated for high enough bhp, as they are looking for a filter kit rated to 450bhp for some reason?? So it may work, it may not. I cant see the Saab being that much different that you couldn't get it working on the VX engine.
    Hehe I was going to mention that lol. Yep after going through the threads on the VXR forum most people weren't happy with the filter as it wasn't good upto 400bhp or something.

    As the most I will be looking at is 325bhp and the phase 3 tuning on BSR is 320bhp with the induction kit, it should be fine for me. Anything larger and I believe the surface area of the cone would need to be larger which is impossible with the space available

    Just awaiting that reply from BSR to see what the options are as we all secretly want more music from that lovely engine.

  10. #10
    Regular Member luke4487's Avatar
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    BSR got back to me with a very simple and bland 'the Optiflow kit will not fit the Vectra... and the MAF sensor is not shown on the picture'.

    Did some research and the MAF and vent pipe seem to connect around the front centre of the car where the inlet pipe goes from the airbox to the turbo...

    However the new 9-5 has been released with what looks like the same spec 2.8 as the Insignia and uses the same airbox etc as us so it may be one to look out for. I am contemplating now buying in some tube and cutting it down to increase the feed pipe to the airbox.

    Anyone done this yet? Made the feed hole larger and fitted a larger diameter pipe to the front? Not sure if it would have a negative effect as the smaller diameter would cause more suction due to the restriction. May need to up the pipe from the airbox to the turbo first?

    Really not impressed that I can't have a nice V6 grunt and have to wait for the exhaust in the summer

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