Bmc cda or raceland green filter?

1. Sandham L-plater Joined: Oct 2012 Posts: 47

   #1 16th October 2012, 10:42

   I know people will say search but all I get when using the search is pages or for sale and project threads!
   
   Basically I bought a vtr with a bmc fitted and am currently running it with a modified raceland scoop for a cold air feed..
   
   I'm considering putting this setup up for swaps for a raceland with a green filter..
   
   Anyone know the pros/ cons of each or can recommend which to go for resulting in better gains with a stainless 421 and a straight through pipe from that?
2. Sandham L-plater Joined: Oct 2012 Posts: 47

   #2 16th October 2012, 10:51

   
   
   This is my current setup, I removed the filter from the raceland then made the scoop fit
3. Saxovch22 Established Member Joined: Feb 2011 Scotland Posts: 1191 02 Saxo Vts

   #3 16th October 2012, 11:01

   I lol'd
   
   
   Guessing you couldn't decide which one you wanted
4. Sandham L-plater Joined: Oct 2012 Posts: 47

   #4 16th October 2012, 11:18

   Haha had a spare raceland that was all cracked at the front and didn't have a cold airfeed for the bmc so I bodged one up for it
5. KamRacing Saxperience Addict Joined: Nov 2006 A farm shed in Aylesbury Posts: 14916 Corolla AE86 Peugeot 205 B18C (in bits)

   #5 16th October 2012, 11:39

   Give the BMC a good clean and an oil and you will probably notice more of a difference. I'd just keep this setup
6. Wee_monkey1987 Regular Poster Joined: Sep 2011 Hertfordshire Posts: 250 2000 Saxo Woodland Green VTS, 2002 Mazda MX5

   #6 16th October 2012, 11:44

   that's some serious filtration going on there where you planning on driving it a quarry?
7. Sandham L-plater Joined: Oct 2012 Posts: 47

   #7 16th October 2012, 11:56

   Quote:

   Originally Posted by Wee_monkey1987 that's some serious filtration going on there where you planning on driving it a quarry?

   If you read it properly there's no filter in the raceland... It's just for cold air
8. Pricklep Saxperience Hardcore! Joined: Mar 2008 Posts: 31279 Citroen Saxo VTS, S60 D5

   #8 16th October 2012, 11:58

   Quote:

   Originally Posted by Sandham This is my current setup, I removed the filter from the raceland then made the scoop fit

   Not going to lie mate it looks awful!
9. Sandham L-plater Joined: Oct 2012 Posts: 47

   #9 16th October 2012, 12:21

   Quote:

   Originally Posted by Prickle Not going to lie mate it looks awful!

   Doesn't bother me what it looks like when it's under a closed bonnet..
   I want to know which is better a raceland induction with a green filter or a cda!
10. Wee_monkey1987 Regular Poster Joined: Sep 2011 Hertfordshire Posts: 250 2000 Saxo Woodland Green VTS, 2002 Mazda MX5

    #10 16th October 2012, 13:49

    Quote:

    Originally Posted by Sandham If you read it properly there's no filter in the raceland... It's just for cold air

    yeh i did read it properly and tbh its a stupid system, first and foremost i'd suggest you do abit of fluid mechanics research particularly looking at the VENTURI EFFECT!
    
    it's basic plumbing mate that demonstrates when a pipe diameter is reduced the pressure across that section of pipe is reduced therefore the velocity increases to achieve the same mass flow rate. On the other hand when the pipe diameter increases the pressure increases reducing the velocity flow to achieve the same mass flow rate.
    
    So what your crappy system is doing is creating huge pressure differentials in your intake system, first the flow velocity increases from the slam panel to the back of the cold air feed then its slowed back down again because the CDA diameter is bigger than the cold air feed diameter plus its filtered there creating more pressure then its reduced again to the standard plenum size! my advice sack of the CDA
11. AlexBp West Midlands Joined: Dec 2007 West mids Posts: 23149 Supra,civic GL

    #11 16th October 2012, 19:05

    i have to say from experience i dislike bmcs tried a few pipeworks into mine and never made decent gains
    
    had a GREEN (raceland style) and that worked well but i now have a 16v stock airbox a K&N filter and some nice cold air from the widemouth of the bumper and i have a much nicer result i feel
    
    i think 90% of induction kits are just for show tbh
12. dolby20 Saxperience Forum Bum Joined: Mar 2011 Esholt - West Yorkshire Posts: 3113 Citroen Saxo VTR 2002

    #12 16th October 2012, 19:10

    Looks a bodge
    As said
    90% of induction kits are for show - mine included
    Get the standard setup back on with a good panel filter and get rid of the bodge!