Just Commodores Forum Community

It takes just a moment to join our fantastic community

Register

VN Series 2 - VR Bellmouth

Discussion in 'V6 Development And Modification' started by AirStrike, Nov 22, 2004.

  1. whitevg

    whitevg New Member

    Messages:
    17
    Likes Received:
    0
    Trophy Points:
    0
    Joined:
    Nov 28, 2011
    Location:
    Moruya
    Members Ride:
    VG commodore 3.8
    Took it out and it made no difference what so ever. Leave it in, it's there for a reason.
     
  2. Holdens123

    Holdens123 New Member

    Messages:
    1
    Likes Received:
    0
    Trophy Points:
    0
    Joined:
    Jul 7, 2014
    Location:
    Nsw
    Members Ride:
    1993 vr commodore manual
    Look I'm new to this sight but I am a mechanic don't take your bellmouth put if u do be prepared to Reco your moter as it will burn out your rear cylinders and your valves as they put it there becals the rear cylinders weren't firing correctly u can modify it bye cuting a small portion of the top of the bellmouth off but uther than that you are crazy to compleatly remove it :)
     
  3. Jack_vs_BT1

    Jack_vs_BT1 New Member

    Messages:
    153
    Likes Received:
    0
    Trophy Points:
    0
    Joined:
    May 2, 2012
    Location:
    Kyneton, vic
    Members Ride:
    Vs BT1
    Vn S1s never had em mine cops a hard time with 100hp of gas jammed down it's throat and I've never had an issue
     
  4. mossy14

    mossy14 New Member

    Messages:
    51
    Likes Received:
    0
    Trophy Points:
    0
    Joined:
    Oct 15, 2014
    Location:
    perth
    Members Ride:
    vr commodore 3.8
    took it out , next day blew a hole in my muffler dnt know how and my fuel gauge is dropping twice as fast , runs rougher , ive been staring at it and it actually stopped for a milly sec like it missfired
     
  5. someguy360

    someguy360 Well-Known Member

    Messages:
    2,267
    Likes Received:
    401
    Trophy Points:
    83
    Joined:
    Jan 29, 2011
    Location:
    Adelaide Hills
    Members Ride:
    94' VR 304 - 05' Navara - 17' Focus - 12' Sorento
    I remember you saying you did the inlet manifold gaskets at the same time.

    Did you torque the inlet manifold bolts correctly (e.g with a torque wrench), if you do them up with a standard wrench or spanner chances are you will over tighten them and damage the gasket, the car will then run rough as you have created a giant vacuum leak.....I see it far too often with V6's, terrible design those plastic gaskets.

    Removing the bellmouth shouldn't cause the issues you are describing.
     
  6. shadetreemechanic

    shadetreemechanic Member

    Messages:
    228
    Likes Received:
    1
    Trophy Points:
    18
    Joined:
    Jan 2, 2011
    Location:
    perth
    Members Ride:
    VR v6
    I took mine out a while back and observed the results....

    Prior to removal the rear 2 plugs were getting a little foul (not sure why) so i thought if the rear cylinders lean out a bit like people say it should be good.
    So i took it out and then drove about as usual for a few weeks. Engine idles fairly rough but got slight increase in low end torque. I like to rev the crap out of it and it sounds good up high, maybe better than before.

    Then i took out all spark plugs and did a check. They're all spot on. Fouling gone on rear 2 they look tan like all the others.

    I searched a bit on here too and i remember a post by greenfoam (i think, could even be inside this thread) where he says the bellmouth gives good air distribution at idle but suboptimal at high revs. With it removed you get good distribution up high, but suboptimal at idle. I can see why Holden decided to fit one now.
     
  7. mossy14

    mossy14 New Member

    Messages:
    51
    Likes Received:
    0
    Trophy Points:
    0
    Joined:
    Oct 15, 2014
    Location:
    perth
    Members Ride:
    vr commodore 3.8
    yea had 2 go buy a 3/8 torqe wrench jst 4 the job did everythg right, tho i shouldnt put sealent around the gaskets ( coolant passes ) , i did put it in the four corners tho, how do i cheack 4 vacum leak? 2 my understanding u get a piece of hose (my garden hose do? ) and put it 2 ur ear and cheack around?

    probs gona cut the bellmouth it and put it back in,
     
  8. Simz

    Simz New Member

    Messages:
    11
    Likes Received:
    1
    Trophy Points:
    1
    Joined:
    Jan 14, 2018
    Location:
    Salisbury SA
    Members Ride:
    VP commodore
     
    Last edited: Jan 14, 2018
  9. EYY

    EYY Well-Known Member

    Messages:
    4,973
    Likes Received:
    1,036
    Trophy Points:
    113
    Joined:
    Mar 6, 2011
    Location:
    Vic
    Members Ride:
    VS Statesman
    Make sure you take note of the dates on these threads - it's considered poor forum etiquette to dig up old threads. Especially for no good reason.

    Considering the post you quoted was quoting vehicles from the U.S., and the fact that there are only small differences in the quoted power I'd say the difference is because of setup and tune in the American models.
     
    immortality likes this.
  10. immortality

    immortality Home of the smoky breakfast Bacon! Staff Member

    Messages:
    14,662
    Likes Received:
    2,613
    Trophy Points:
    113
    Joined:
    Apr 15, 2006
    Location:
    Sth Auck, NZ
    Members Ride:
    HSV VS Senator, VX s2 Calais S/C
    ^^ What he said!
     
  11. Not_An_Abba_Fan

    Not_An_Abba_Fan Exhaust Guru

    Messages:
    13,813
    Likes Received:
    422
    Trophy Points:
    83
    Joined:
    Aug 18, 2006
    Location:
    Bunbury, WA
    Members Ride:
    Strange Rover
    I thought shovels were banned now?
     
    losh1971 likes this.
  12. Wozza

    Wozza Well-Known Member

    Messages:
    1,888
    Likes Received:
    283
    Trophy Points:
    83
    Joined:
    Dec 13, 2011
    Location:
    Adelaide
    Members Ride:
    VR_GS commodore
    Na just locked in the shed...they are need sometimes to dig through the .................
     
  13. commodore665

    commodore665 expat Saffa

    Messages:
    2,750
    Likes Received:
    1,325
    Trophy Points:
    113
    Joined:
    Dec 30, 2011
    Location:
    New Zealand via Cape Town
    Members Ride:
    2005 SV6 & Alfa Romeo 156 V6
    but there are still plenty of spoons who can dig , just takes a bit longer . :p
     
    immortality likes this.

Share This Page