2000 E46 328ci Coupe - What parts are needed during supercharging - Page 2

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  1.  
    #11
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    markrnorton's Car Details
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    i think you can push more if necessary without comprimising reliablity. i'm running 7.5psi going to go to 9 ish soon.

    depends what you want i guess, its not like a turbo where your boosting max quite quick once you've got it spinning.

    my s/c ramps up gradually , starts around 1psi at 1k and hits peak boost around 3k upwards if your at max load with WOT

    i guess its what you want and how much you use your car.

    but you always want more !!!
    Z3
     
     

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    #12
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    ^ what kit did you opt for out of interest?

    In the states a lot of them are running 8 PSI on 97RON standard fuel and standard OBD and active autowerke quote 8PSI on standard internals - seems to be a lot of people reporting no problems with this set up either..
     
     

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    #13
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    Running the Downing Atlanta kit on the M44 4 pot. it works great and the kit is excellent quality.

    i run on super unleaded all the time, modified ecu for fueling with the RRFPR as well, for the moment. 8psi is safe unless you are constantly booting it everywhere !!

    once you get much above this the charge temp increases significantly so intercooling of some nature is required.

    i've already built a bigger bore straight thro stainless pipe to keep engine temps down.

    Z3
     
     

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    #14
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    Just as a follow up - i have the 'proper' style roots blower a classic haha
    Z3
     
     

  6.  
    #15
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    Now you got me flowing !!

    inlet side is also important like exhaust

    I have a Simota filter witha 3" cold air feed from the lower front grille.

    Exhaust, as i said, i enlarged to 2.5" all the way through with sports CAT.





    its all the small things that add up and make the system run a bit smoother.

    clutch needed replacing and upgrading because of the additional torque
    chromoly lightened flywheel and m3 3.0 clutch went on.

    this included a new M3 slave cylinder too.

    dont forget brakes and suspension too into the price, wideband lambda to monitor fueling

    plus lots more !!!
    Z3
     
     

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    jtsystems (22-03-2010)

  8.  
    #16
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    ooo nicely shown off Mark! and rightly so, looks mint.

    Of course if I do go down this route there are considerable other areas to consider where costs will creep, suspension and braking been one of the main points.

    to be fair though, the brakes and suspension on these as standard is pretty decent compared to other cars which are tweeked to 300BHP!

    But of course for the best way forward will be to look at all of these options!

    Is that the normal intake position for the Z3 or have you customised it?
     
     

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    #17
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    Oh did a little google on the Downing and if you know anyone in the market there seems a pretty reasonable one here:

    http://www.pistonheads.com/sales/1492639.htm
     
     

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    #18
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    No it's a custom intake, new bends and flexes with a BMW 330 simota filter and that custom feed pipe I threaded thro behind the front light

    it's the stuff you forget that catches you out ! If you know what I mean

    also did the viscous fan delete
    Z3
     
     

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    #19
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    Now after reading more and more about s/c's it seems that the centrifugal type is the only one which results in delayed application of power to the wheels due to only reaching optimum pressure at 3k, while it may bring the top end power higher than others it also appears to be the juicy on the MPG, same as twinscrew.

    However roots seems to bring power across the full rev range which allows for more punchy acceleration even at low RPM (the centri type gives lots of boost at top end)

    I almost feel like i'm being talking about of centri charger from reading other forums, but then it also seems to be the cheapest/simplist install with the greatest gains.

    Any thoughts?
     
     

  12.  
    #20
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    the centrifugal charger is basically a belt driven turbo, that why it makes the power at mid to top end, it takes a while to spin up.

    i prefer the roots tye blower as it just makes the engine 'feel' like a larger capacity engine as it speads power.

    have you thought about turbo ? you can get alot of diy kits from the states pretty cheap, you'll get similar reliable power without the parasitic loss from the blower
    Z3
     
     

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