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BMC CDA - Is it worth it?

Discussion in 'A3/S3 Forum (8L Chassis)' started by DJ_Troopa, Feb 19, 2010.

  1. badger5
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    badger5 www.badger5.co.uk Site Sponsor

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    [Feb 23, 2010]
    test as I said before..

    #41
  2. DJ_Troopa
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    DJ_Troopa K1 Driver

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    [Feb 23, 2010]
    Badger - How much for the Jetex and do you supply heat shields if they're recommended?
    #42
  3. DJ_Troopa
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    DJ_Troopa K1 Driver

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  4. fran-s3
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    fran-s3 Active Member VCDS Map User

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    [Feb 23, 2010]
    Or get the best of both worlds and drill your airbox like I have... Not massive holes just subtle small ones away from the engine towards the cold air feed BELOW the filter... Must admit I did it to hear the DV more and was will to sacrifice performance loss but I haven't noticed any loss even in the summer. (honestly!) Running a green panel in there to, you certainly hear it sucking before 2k which you didn't before but maybe that's the holes emphasing the noise. I think it holds boost slightly longer and acceleration is still snappy as before... Each to their own, yes I'm well aware it's letting hot air in also but obv not as much as a open cone ... when I touch the airbox after a run (without the holes) it was pretty dam warm so chances are it's letting in hot air in anyhow...
    Last edited: Feb 23, 2010
    #44
  5. 1animal1
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    1animal1 The Clar!! it mouves!!! VCDS Map User

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    [Feb 23, 2010]
    i have a few small holes also as after taking the fins out as i wanted drainage..... it defo does create more noise, not so much annoying either, its a nice subtle sucking noise (is there a better noise :) )
    #45
  6. fran-s3
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    fran-s3 Active Member VCDS Map User

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    [Feb 23, 2010]
    No there isn't subtle but nice - notice any performance loss? Yes I smoothed my airbox to. Recently I took the 'trumpet' plastic thing after the MAF off to. Can't say I've noticed anything after that to be honest...
    #46
  7. badger5
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    badger5 www.badger5.co.uk Site Sponsor

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    [Feb 23, 2010]
    £52 for the 80mm MAF sized JR's
    I dont supply heat shields tho, sorry
    #47
  8. 1animal1
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    1animal1 The Clar!! it mouves!!! VCDS Map User

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    [Feb 23, 2010]
    i think thats something nobodies managed to master... a decent heatshield..... in my mind if you could mount a cone in the air box (dont ask me how if it was easy we'd all do it) and mount a decent CAI then you'd have the ideal set up...... although you've still got to question cone vs panel in that scenario too, theory suggests it would be better as Bill mentioned the air flow increases with the cone..... but then you may be choking the cone having it so isolated....

    oh the joys :)
    #48
  9. DJ_Troopa
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    DJ_Troopa K1 Driver

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    [Feb 26, 2010]
    Update:

    I bought that second hand BMC kit off Pistonheads for £80! It was used on his Golf for less than a year and in mint condition. It also came with the cold air feed pipe which is really strong and not one of these flimsy foil ones! All i need is a 3" silicone joiner which i've now ordered.

    I'll update this topic with a vid once it's on and let you know how i get on with it. If i don't like it, i can always stick my airbox with green cotton panel filter back on. Gives me a chance to play with the airbox now as it's off!
    #49
  10. badger5
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    badger5 www.badger5.co.uk Site Sponsor

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    [Feb 26, 2010]
    either in performance terms..
    Jetex one is cheaper and generally more available than Green, who's stocking is a bit erratic

    I use giant 300mm Green filter on my ibiza, 100mm intake on it, but it does run 600bhp - lol

    the FR08001 is good for 400 ponies so pretty good for £52
    #50
  11. badger5
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    badger5 www.badger5.co.uk Site Sponsor

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    [Feb 26, 2010]
    after all this you bought a known restrictive filter
    *bemused*
    #51
  12. DJ_Troopa
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    DJ_Troopa K1 Driver

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    [Feb 26, 2010]
    lol Sorry Bill! I'm not here to insult your intelligence. The only reason why i didn't buy one before as it costs over £200 and seeing this was a good buy to me. Like i mentioned before, if i don't like it i can always revert to another option ie. cone filter! Got the BMC for a good price so i could still sell it on if i wanted to.

    I'll see how this goes! Thanks for your help Bill.

    Jay
    #52
  13. MURRAYS444
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    MURRAYS444 Member

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    [Feb 26, 2010]
    That would be good to see if it does make a differance you got a bit of a bargin for it DJ TROOPA
    #53
  14. badger5
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    badger5 www.badger5.co.uk Site Sponsor

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    [Feb 26, 2010]
    well each to their own.. cheap the criteria to override all others then

    log before and after airflows and post em up..
    15g/s gained remember on the S3 I removed the BMC from. - to put into perspective... I got the same gain in airflow from just replacing the BMc with a JR filter than the owner did from fitting his hybrid K04... £52 vs £650 for same gain.
    #54
  15. JD09
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    JD09 I'm not modding, I'm improving VCDS Map User

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    [Feb 26, 2010]
    Jay these things are horrendous!! Willing to make bets on you selling it, the first warm day we get!
    #55
  16. DJ_Troopa
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    DJ_Troopa K1 Driver

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    [Feb 26, 2010]
    Why do you say that matey? Have you had one before?
    #56
  17. A3Tom
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    A3Tom Smell my finger.

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    [Feb 26, 2010]
    Well my cones been on for a few days and its alright to be honest. Car seems to feel better at higher revs than before but that could be placebo effect :)

    Still, its not any slower so thats all that matters.

    Anyone local that fancies helping me out with some logs?
    #57
  18. S3 Rav
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    S3 Rav Well-Known Member

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    [Feb 26, 2010]
    would be interesting to see if there are any effects postivie or negative in the summer and not in the nice cold weather right now.
    #58
  19. DJ_Troopa
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    DJ_Troopa K1 Driver

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    [Feb 26, 2010]
    I know someone with vag-com in my area so i'll try to get some logs here and there. Fair enough people say bmc's are no good but i'm willing to give this a go. It'll be good to see what it's like in these low temps we have now and then what happens when summer temps arrive.

    Will definitely keep this updated!

    Thanks for the info guys.

    Jay
    #59
  20. JD09
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    JD09 I'm not modding, I'm improving VCDS Map User

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    [Feb 26, 2010]
    I had one on my Clio for a week. Sold it asap. Also had a few others like Viper filters, all costing less than advertised prices so never spent too much and made sure I wasn't out of pocket.
    #60
  21. 3.2 Ju
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    3.2 Ju Well-Known Member

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    [Feb 26, 2010]
    When I had my Leon Cupra R a few years ago, I tried a BMC CDA and tbh it was rubbish! Airflow was quite a bit down on the standard paper filter and also felt slower on the road. I settled on a Dynatwist and that was definately a lot better than the BMC and also the standard filter.
    [​IMG]
    #61
  22. steviet
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    steviet Member

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    [Feb 26, 2010]
    So for my A3 1.8t is it worth getting a jr filter etc?..mine has been remapped and has all turbo silicone hoses and forge dv.
    #62

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