User Tag List

Thanks Thanks:  0
Likes Likes:  0
Page 1 of 2 12 LastLast
Results 1 to 10 of 13

Thread: Shocking air flow!

  1. #1
    Regular Member nutron's Avatar
    Join Date
    Jul 2005
    Location
    South Central England
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    10 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats

    Vehicle : Vauxhall

    Trim : very

    Engine : Z19DTH

    Year : Nosey

    confused Shocking air flow!

    I've had a chance to put the new girl on the rollers now and the results brought a mix of feelings.

    standard
    ...153bhp @ fly
    ...223lbft @ road wheel (about 259lbft @ fly)

    So not a big performer in the power boat but very strong on torque.

    Tunit box @ level 9 (max)
    ...175bhp @ fly
    ...246lbft @ road wheel (about 286lbft @ fly)

    A very unimpressive increase from where I was standing, so I had a little think about what could be the limiting factors. I had my head under the back during the runs (no visible exhaust yet) and saw no smoking at all, so there should be spec for more fuel. I had had this box on the last Vecy before the mapping though and that had gone from an under performer (148bhp/215lbft) to 179bhp.

    I came to the conclusion that it must be air flow that was the biggest factor. If you look at the pre-facelift, the intake is placed behind the grill and if you remove the deflector plate (couple of screws), then air can ram straight in. With the facelift model the upper grill does not let air through, the slats are just for show!? I had already attacked this problem and cut a hole behind out of sight, to allow air flow through the grill but it obviously wasn't enough.

    So off I went to Halfords and picked up a set of flat plastic mud guards (just a sheet of plastic in my book but they are labeled up as mud guards and Subaru's have something like them). I then cut another slot above the chrome V and made a plastic air guide with the crude from Halfords.

    The result seems promising, I haven't been back to the rollers yet but I have started to get torque steering, which I haven't had with this one before. So I'll pop back down, hopefully next week and see what's happened.

  2. #2
    Regular Member Auto-Brite's Avatar
    Join Date
    Jul 2007
    Location
    Staffordshire
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default

    Interesting!

    Let us know how you get on.

  3. #3
    Regular Member rushy's Avatar
    Join Date
    Jul 2005
    Location
    Old School Vectra-C.Com. Residing in sunny Leeds.
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats

    Vehicle : SRi


    Engine : Z22SE (2.2 Petrol)

    Year : 2004

    Mileage : 137000

    Default

    Will the mod show up on the rollers though as the fans aren't going to "ram" much air in?
    By the way ABD-1, it seams quite strange seeing you here and not reading about foam lances and stuff LOL

  4. #4
    Regular Member nutron's Avatar
    Join Date
    Jul 2005
    Location
    South Central England
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    10 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats

    Vehicle : Vauxhall

    Trim : very

    Engine : Z19DTH

    Year : Nosey

    Default

    It should make a difference, as the standard car even with the bonnet up, doesn't have any way for cold air to get to the inlet. The facelift intake draws in engine bay air or air that has come all the way up from the bottom grill. I'd like to see some other facelift models to compare, other engine models that is.

  5. #5
    spoons
    Guest

    Default

    Carl, I'm sure Regal Autosport have developed a cold air induction system for the facelift Signum.. so should be the same for our Vectra.

    They feed the air in through an extended pipe, just above the 'V' grill (if I remember correctly)

  6. #6
    Regular Member nutron's Avatar
    Join Date
    Jul 2005
    Location
    South Central England
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    10 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats

    Vehicle : Vauxhall

    Trim : very

    Engine : Z19DTH

    Year : Nosey

    Default

    My new flow path is just under then edge of the bonnet, above the chrome (or black ) 'V' grill, so probably the same place.

    No I don't have pics yet and not I'm not getting dressed to go and get some now either.

  7. #7
    spoons
    Guest

    Default

    Quote Originally Posted by nutron View Post
    No I don't have pics yet and not I'm not getting dressed to go and get some now either.
    Its warm enough... you dont need to get dressed !!!

  8. #8
    Regular Member nutron's Avatar
    Join Date
    Jul 2005
    Location
    South Central England
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    10 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats

    Vehicle : Vauxhall

    Trim : very

    Engine : Z19DTH

    Year : Nosey

    Default

    ...I'm not camping near you...

  9. #9
    Regular Member Swatty's Avatar
    Join Date
    Jul 2006
    Location
    greenock
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default

    Hi Nutron, you are always trying to push the envelope – have you thought about going down the NOS route (this could get you the performance you are looking for but I guess not impact on your warranty).

    Alternatively are you approaching this from an engineering problem (make what you have work efficiently as possible)

  10. #10
    Regular Member nutron's Avatar
    Join Date
    Jul 2005
    Location
    South Central England
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    10 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats

    Vehicle : Vauxhall

    Trim : very

    Engine : Z19DTH

    Year : Nosey

    Default

    I though about NOS on the last one but it got to the stage where adding NOS would have put the gearbox at risk. I've got someone looking at remapping for me now and I would like to either get a reworked turbo or the twin turbo setup from the new CDTTIs. This thread is about airflow though, I think I've talk about the turbos enough recently.

Page 1 of 2 12 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Shocking
    By bigbnlr in forum Vectra C / Signum Car Chat
    Replies: 0
    Last Post: 21st January 2010, 17:54
  2. Shocking!!!
    By thegoldenbullet in forum Games Room
    Replies: 12
    Last Post: 16th January 2009, 12:47
  3. Shocking!!
    By dave16v in forum Vectra C / Signum Car Chat
    Replies: 22
    Last Post: 24th May 2008, 16:59
  4. this is shocking
    By chrisgettings in forum The 'Off Topic' room
    Replies: 1
    Last Post: 9th April 2008, 15:28
  5. Shocking!
    By Big Sig in forum General Chat
    Replies: 18
    Last Post: 2nd April 2008, 20:11

Visitors found this page by searching for:

Nobody landed on this page from a search engine, yet!

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
  •