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355 air intake mods NEW

Discussion in '348/355' started by butch355, Feb 22, 2005.

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  1. butch355

    butch355 Karting

    Jan 27, 2005
    114
    Denver
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    Brent
    #1 butch355, Feb 22, 2005
    Well I just got a 97 355 spider last month and found out about new product called CDA by BMC (carbon dynamic airbox). Basically its a cone filter in a carbon box that eliminates the whole airfilter box and makes the air spin and goes straight into the air intake. The process makes sense because you use all existing parts and the air doesnt gets redirected in the old airbox from low to high and through the paper (or foam or whatever you use)

    It took me about one hour to put on (thats knowing NOTHING) and had one small mod I had to do if anyone else gets this system. You will need to reduce the airbox from 3inch to 2inch going from engine side to CDA. So I went to local Home Depot and bought a rubber black sewer line reducer for 5 bucks (with clamps and looks like factory if you can belive it!!) each and made the reduction perfect.

    The car sounds better, and I can notice good gains at all rpms and also gets rid of the paper filters and says to last about 40K until needs to be cleaned like any KN. Total cost $235 each and $5 for reducer so $240 a side plus shipping. The cheapest place I found them was called Fabspeed motorsport.

    Hope this helps some of you since finding the reducer took more time than the whole install.
     
  2. Steve R

    Steve R F1 Rookie
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    Sep 15, 2004
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    #2 Steve R, Feb 22, 2005
    DUDE...I can't believe you....why'd you go and blow it??? We were gonna take that same sewer line reducer and print a little red horse on it and sell it for $125. ;)

    How did it change the sound? How so have you noticed a change in the power???? I believe you...but how could the small amount of restriction in a stock filter actually inhibit that much power that you could notice it??? Are you sure the results are there???

    I won't kid ya, I just got my '97 355 am was about to blow some good money on some BMC filters....this sounds interesting!! Would you be able to post some pics please??

    Thanks!
     
  3. tonyyoshi

    tonyyoshi Formula Junior

    Jan 8, 2005
    308
    Hong Kong
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    Tony Brooker
    #3 tonyyoshi, Feb 22, 2005
  4. butch355

    butch355 Karting

    Jan 27, 2005
    114
    Denver
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    Brent
    #4 butch355, Feb 22, 2005
    Last edited by a moderator: Sep 7, 2017
    The sound just seems a little deeper without the paper filter. I have done this on all my P cars (964, 3.2 Targa, and 996) and feel and hear much better response. The biggest part of this system I think is having the car use the stock cold air intake hoses (cant do that on cone filters) then going into the engine without changing direction of the air (from the bottom of the airbox, through the filter then going out the top of the airbox) and speeding up and creating a tunnel like action in the process. I am no expert but seems like common sense to me.... I feel the results are there, and I know the car and can tell if one wheel is 5 PSI low or the smallest change in power. Even if its minimal in the end the costs are the same as changing the paper filters and I think it just plain looks better....

    PS that other photo must not be US model, I did see he used some more homemade adapters than the sewer line reducers with no red horse on them, hehe...bad joke sorry...
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  5. tonyyoshi

    tonyyoshi Formula Junior

    Jan 8, 2005
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    #5 tonyyoshi, Feb 22, 2005
    Correct, it's a UK 95 model with 2.7 ECU, hence the dual intake pipes. These cars are a few bhp more powerful than the 5.1(?) model and were used for the Challenge cars.

    What is a sewer line reducer????
     
  6. f355b

    f355b Formula Junior

    Jan 23, 2004
    449
    Little Silver,NJ
    #6 f355b, Feb 22, 2005
    Last edited by a moderator: Sep 7, 2017
  7. bob348

    bob348 Formula 3

    Apr 13, 2004
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    #7 bob348, Feb 23, 2005
    Last edited by a moderator: Sep 7, 2017
  8. h22gordo

    h22gordo Formula Junior

    May 24, 2004
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    #8 h22gordo, Feb 24, 2005
    The BMC carbon airbox's don't look the greatest, but they do get the job done.

    You'll probably get the same power results from the BMC as you would from the Gruppe-M, for a fraction of the price!
     
  9. W00dEar

    W00dEar F1 Rookie
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    Feb 24, 2004
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    #9 W00dEar, Feb 24, 2005
    u get what u pay for, for the looks. not performance.
    i dont see how gruppm gives more power than bmc. all intake are basicly same, u run a cone filter instead of a box. add a heat shield, blah blah.
     
  10. racerx

    racerx Guest

    Nov 23, 2003
    882
    #10 racerx, Feb 25, 2005
    Could someone please show a pic inside the cda of the cone filter? Is it just a kn filter? Does it come with that oil like substance that gets on the wire?
     
  11. bob348

    bob348 Formula 3

    Apr 13, 2004
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    #11 bob348, Feb 25, 2005
    i think than the bmc filters look better than the oem filter on 355 or 348...
     
  12. f355b

    f355b Formula Junior

    Jan 23, 2004
    449
    Little Silver,NJ
    #12 f355b, Feb 25, 2005
    Just looks way to busy. and what we talking about power wise? 3-5hp?
     
  13. Ferrari Mackintosh

    Ferrari Mackintosh Formula Junior

    Sep 21, 2004
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    #13 Ferrari Mackintosh, Feb 25, 2005
    I must be in the minority group here, as I think the BMC's look great installed in the photos, infact better looking than the GRUPPE M in my opinion. On top of that the BMC's should be lighter as well. DOES ANYONE HERE KNOW IF I COULD FIT THE BMC AIRBOXES TO MY 512TR?
     
  14. ENZOFORZA

    ENZOFORZA Karting

    Nov 3, 2003
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    JAKE
    #14 ENZOFORZA, Feb 25, 2005
    who is a bmc dealer in the US? do they make them for 355 2.7M? do they make them for other Fcars (360, 512, etc)
     
  15. Ferrari Mackintosh

    Ferrari Mackintosh Formula Junior

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    #15 Ferrari Mackintosh, Feb 25, 2005
    ENZOFORZA,

    Check www.bmcairfilters.com and you will find airboxes for quite a few Ferraris but nothing specifically listed for the 512TR. This is what I intend to find out, but no luck so far.
     
  16. tonyyoshi

    tonyyoshi Formula Junior

    Jan 8, 2005
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    Tony Brooker
    #16 tonyyoshi, Mar 18, 2005
    Anyone got a before and after dyno of a 355 5.2 with the CDA air filters fitted?
     
  17. vittorio

    vittorio Karting

    Nov 12, 2003
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    #17 vittorio, May 31, 2010
    I've put them on my '98 355 F1 and.......good and quicker response at med-high revs, but the engine irregular at low revs. Perhaps too much air in. So I've put them off and returned to stock system with rectangular BMC......Much better and smooth
     
  18. eyboro

    eyboro Formula Junior
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    #18 eyboro, May 31, 2010
    Last edited by a moderator: Sep 7, 2017
    First think you have to do is get this resonator box out of your engine, it serves no purpose. Now lets get gothspeed opinion on this set up.
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  19. AceMaster

    AceMaster Three Time F1 World Champ

    Feb 6, 2009
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    #19 AceMaster, May 31, 2010
    Holy smokes, I just saw that the original thread began in 2005 - talk about a comeback!!
     
  20. gothspeed

    gothspeed F1 World Champ

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    #20 gothspeed, May 31, 2010
    +1 .... on that resonator ..... lol :p........ that box really needs to go ..... especially on that setup :eek:!!! It looks like those cylinder filters will work better but during some of my dyno tests I found the stock filters were not as restrictive as it seems ...... it was the factory 5.2 'tops' that were the biggest detriment to flow. Some 'new tops' will free up some HP. :)

    +2005 ........ :D
     
  21. ruey220

    ruey220 Formula Junior
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    May 24, 2019
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    #21 ruey220, Aug 29, 2019
    does anyone have this setup on their F355? How was the longevity and curious about the sound.
     

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