Page 1 of 4 1234 LastLast
Results 1 to 25 of 99

Thread: EASY, Cheap, or free upgrades... for a stock 328is!

  1. #1
    Join Date
    Feb 2006
    Location
    Highlands Ranch, Colorado
    Posts
    159
    My Cars
    BMW 328is, Audi A4 1.8t, 95 jeep yj rock crawler

    EASY, Cheap, or free upgrades... for a stock 328is!

    The stock air box is a good design... But the hole for the air to get in to the box is WAY to small. The engine can not get air through that small of a hole. I took it out and put in a single CAI. But when the hood was open, and I pushed the gas pedal, the rubber hose that goes to the sensor and throttle body would contract. So I put in another CAI, so now I have a twin CAI. The hose does not move now, and the engine can get all the air it can. It also gave me a ton more mid range and high range power. It also sounds like a beast!! Huge difference. All this I paid 50$.

    I would suggest this set up for sure. I will get some pictures of the Twin CAI soon. but not tonight.

    Also, look in the exhaust "tippers" at the end of your exhaust. There is a valve that opens and shuts the right "tip" on the exit of the exhaust. Look, and you will see a rubber hose connected to it... CUT IT, and plug it up with a screw! You can hear all your vanos and everything. Also gives low end power because it was made to open up at 2500rpm and higher, and close at low rpm to silence the vanos.


    96' 328is

    Austin

  2. #2
    Join Date
    Dec 2005
    Location
    OKC
    Posts
    3,160
    My Cars
    '14 4Runner
    I heard that propping open that exhaust flap made you lose a little power under 2500.. And twin CAI? This I must see..


  3. #3
    Join Date
    Dec 2002
    Location
    Southern California
    Posts
    6,885
    My Cars
    don't ask
    lol
    -Peter

    Current toy: none
    Past cars: 88 M3, 99 M3 x2, 04 M3, 91 NSX, 06 S2000, 01 911TT, 06 Exige, 00 NSX, 04 GT3

  4. #4
    Join Date
    Feb 2006
    Location
    Highlands Ranch, Colorado
    Posts
    159
    My Cars
    BMW 328is, Audi A4 1.8t, 95 jeep yj rock crawler
    I dont know how it could lose power. It is getting better air flow. And after market exhaust do not have it, and it sounds sweet.

    And yes the twin CAI was a crazyu idea... but it really worked.

    I will get pics of the Twin CAI tomorrow, also the exhaust.

  5. #5
    Join Date
    Oct 2004
    Location
    Kirkland, WA
    Posts
    7,285
    My Cars
    2006 Toyota Tundra
    twin intake OMG i have to see this

  6. #6
    Join Date
    Dec 2005
    Location
    Back to the Burbs of NYC
    Posts
    1,159
    My Cars
    '96 ///M 328i
    Subscribed
    Back on the Boards...New Pic Coming Soon!
    OEM staggered LTWs|Bilstein BTS Kit|Depo Ellipsoids
    |6000k ProLumen HIDs|Predator Chromiums|///M Front Bumper|///M Mirrors|///M Moldings|///M Diffuser|Cosmosv2|B&B Tri-flo w/DTM tips
    4>2 Member #2

  7. #7
    Join Date
    Mar 2005
    Location
    Colorado
    Posts
    1,513
    My Cars
    2000 Saab 9-3
    Quote Originally Posted by SebsBlackBimmer
    Subscribed
    ...
    /////////////////////////////////////////////\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
    Vee put vindshield vipers on aur headlights becaush ve are from Shveeden and it rainesh and shnowhs a laut en Sveeden!

  8. #8
    Join Date
    Oct 2005
    Location
    Lancaster Pa, Queens Nyc
    Posts
    967
    My Cars
    2011 BMW 335I msport
    Quote Originally Posted by SebsBlackBimmer
    Subscribed
    +1
    i must see this
    how do you make your money easy im a P.I.M.P.G.A.N.G.S.T.E.R
    I have Gucci style, Burberry class, I'm the Dkny bomb, so kiss my Prada ass
    R 1 3 5
    -l-l-l-
    2 4 6

    ***SeX iS lIkE mAtH. aDd ThE bEd, SuBtRaCt ThE cLoThEs, DiViDe tHe LeGs, PrAy U dOn't MuLtIpLy***

  9. #9
    Join Date
    Oct 2004
    Location
    UK
    Posts
    797
    My Cars
    1997 328 i Sport
    back in your jeep boy, lack of backpressure at low revs = loss in power with that exhaust flap open..
    welcome to the placebo effect. it sounds louder so it must be faster...
    2.8L Club Member 219

  10. #10
    Join Date
    Jan 2006
    Location
    wilmington, n.c.
    Posts
    1,557
    My Cars
    95 M3, nasa spec3 #77
    i have got to see this twin cai

  11. #11
    Join Date
    May 2006
    Location
    Cary, NC, USA
    Posts
    617
    My Cars
    93 325is
    Quote Originally Posted by GoNz0
    back in your jeep boy, lack of backpressure at low revs = loss in power with that exhaust flap open..
    welcome to the placebo effect. it sounds louder so it must be faster...
    Exactly....

  12. #12
    Join Date
    Feb 2005
    Location
    Breckenridge, Co
    Posts
    1,908
    My Cars
    98 328i
    Quote Originally Posted by GoNz0
    back in your jeep boy, lack of backpressure at low revs = loss in power with that exhaust flap open..
    welcome to the placebo effect. it sounds louder so it must be faster...
    Not to threadjack,eventhough i just did , but is it possible for this flap to be stuck open....If so how do i close it?

  13. #13
    Join Date
    Feb 2001
    Location
    North Jersey
    Posts
    37,960
    My Cars
    Rogue 3 TTs2.5 / Rubicon
    oh jeez.....

    Hey man, I'm a professional!

  14. #14
    Join Date
    Feb 2005
    Location
    Dallas, TX
    Posts
    3,800
    My Cars
    96 328is, 01 M5
    omgz!!!!! must see.......

    ^^ Really old picture.
    Quote Originally Posted by Luftwaffe1O1 View Post
    I am going to make a bold claim, that the f30 is this millenium's e30...... god needed a new chariot, he decided to upgrade to something thats not falling apart and making farting noises down the street having satan laughing at him.
    Quote Originally Posted by sparkchaser View Post
    Idiocracy was supposed to be cautionary tale, not a prophecy.

  15. #15
    Join Date
    Oct 2004
    Location
    UK
    Posts
    797
    My Cars
    1997 328 i Sport
    Quote Originally Posted by forumjp59
    Not to threadjack,eventhough i just did , but is it possible for this flap to be stuck open....If so how do i close it?
    it is open by default, so if it farks up it cuases no top end power loss. it does 2 things, adds a little torque below 2500rpm, and only 1-5ft lbs tops, and also keeps exhaust noise down by diverting gases through 1 pipe,
    if its bust it may be the electric valve in the trunk, its under the plastic cover to the left of the wheel well.

    if the flap stays open once you start the car, somethings faulty.

    air pipe connects to the backbox, runs up into the trunk to the valve. then off up the side of the car to the fusebox where you will see the pipe come out to a 90 degree elbow and off under the inlet manifold to the plastic round pressure equaliser, that comes off to the underside of the inlet manifold.

    time to trace the pipe and see whats wrong if it stays open.

    a few here block the pipe to keep the flap open for the better exhaust note, and rumble as you engine brake.
    the loss in power in most cases is un noticed, due to the placebo effect.

    aftermarket exhaust's dont have the flap, like my janspeed.
    2.8L Club Member 219

  16. #16
    Dan is offline My real name is Charles
    Join Date
    Sep 2002
    Location
    Under The Bridge
    Posts
    8,239
    My Cars
    E39 540i/6, Galant VR4
    *slaps on battle helmet and flap jacket*

    this is going to get interesting...

  17. #17
    Join Date
    Aug 2005
    Location
    Albany, GA
    Posts
    780
    My Cars
    1997 528i, 1957 Beetle Ragtop Custom, '96 VW Jetta
    Tony Downs


  18. #18
    Join Date
    Jul 2005
    Location
    Torrance, CA
    Posts
    6,780
    My Cars
    E36 328iS
    I want to see this also.. post some pics of this twin CAI.. we're all VERY interested.
    "God is great, beer is good, and people are crazy." - Billy Currington

  19. #19
    Join Date
    Jun 2004
    Location
    east coast
    Posts
    400
    My Cars
    e36
    i was lookin at my car to try to see wtf you were talkin about with the exhaust flap, but i don't see it. would it not be there on a 325is?

  20. #20
    Join Date
    Mar 2005
    Location
    Cape Town, South Africa
    Posts
    543
    My Cars
    03 AW E46 M3
    subscribed too

    post pics man
    1998 E36 Euro M3/4/6 Aegean Blue/Ox Blood
    2003 E46 M3 AW/Bl - sold
    1997 E36 328i AW/DG - RIP

  21. #21
    Join Date
    Apr 2006
    Location
    O-hi-ho
    Posts
    60
    My Cars
    93 Black 325i
    *subscribed*
    twin CAI ?
    gotta see this

  22. #22
    Join Date
    Apr 2006
    Location
    san diego CA
    Posts
    76
    My Cars
    1992 325i
    what is CAI?

  23. #23
    Join Date
    Mar 2006
    Location
    LA, Cali
    Posts
    562
    My Cars
    95 530i Bone-Stock
    where're the pictures!!!

  24. #24
    Join Date
    Sep 2005
    Location
    MIAMI, FL
    Posts
    1,739
    My Cars
    1994 325i
    my cousin had it on his evo (twin CAI)
    lame

  25. #25
    Join Date
    Feb 2005
    Location
    Central Valley, CA
    Posts
    1,632
    My Cars
    '89 325iC
    I gotta see this

Page 1 of 4 1234 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •