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Turbo without BOV & running low psi

Discussion in 'VL Holden Commodore (1986 - 1988)' started by snowybill, Dec 23, 2009.

  1. nasty1

    nasty1 New Member

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    6-8 psi on an n/a convert is like running 12 psi on turbo motor or about that.

    im running 12 psi on my n/a convert but i was using a 1.6mm copper head gasket.at the moment the head gasket is giving me dramas as my block isnt oringd and it wants to seep water so im going for 2 genuine nissan head gaskets witch i just completed today so ill see how i go with that
     
  2. VL_5SPEED

    VL_5SPEED New Member

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    Yes you need an intercooler for a high comp setup. You can run just as much boost as a lower comp as long as you have good fuel set up and a good tune. All new turbo cars are high comp.

    2.5" exhaust will work fine

    a hidden cooler is just a normal front mound intercooler what doesnt hang below the front bar. See vl berlina 5spds vl for example. Its a gk tech intercooler.
     
  3. detox_nath83

    detox_nath83 Another VL Driver

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    goodluck bruz with that bow.....hmmmm drunk i am...all will work out

    Snowy your not a noob its all about learning bloke... its all good as long as u r a car enthusiast wanting 2 learn.
    man im installing a turbo in a few days. just installed cooler(c Pics in channel) so stick with it and we will help you through.. call out to Vl 5 speed, Nackerz, Bax, Goon, Bow Down. if i missed any u know who u r all wanting to help the Vl commo cult live :p
     
  4. VL_5SPEED

    VL_5SPEED New Member

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  5. detox_nath83

    detox_nath83 Another VL Driver

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  6. VL Berlina 5speed

    VL Berlina 5speed Apprentice Panel Pusher

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    exactly, VNLUKE was playing around with this and squeezed something like 30psi into a hi comp before the gasket shot out

    hidden cooler, ould paint it black though to hide better
    [​IMG]

    this man speaks the truth!!!!! :smoking:

    yes you dont need a intercooler at stock boost levels but anything from 10 or so on is advised
     
  7. detox_nath83

    detox_nath83 Another VL Driver

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  8. Lazza78

    Lazza78 Banned

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    vl berlina 5speed ur vl is fkn hot mate, watched ur build up over at CT...

    all the talk about 3in exhausts, if ur running the stock cast dump its really pointless fittin a 3inch, inside the factory cast dump its lucky to be 2-1/2in so really ur best off running a 2-1/2 system unless u get a custom dump fabricated... when i had my vlct i fitted a 3in dump after already having a 3in system on the car and noticed a difference, specially how quick it spoolled up.. felt better right thru the rev range...

    my new vlc i just got will be gettin the same treatment as my old car, but in this case, do it right first, saves doin it twice lol
     
  9. stocky

    stocky New Member

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    ok lets think then. lets take a wheel spinning very fast, then in less than a second, force it to spin the opposite way, and you dont think thats going to cause any damage at all? if you were to do with any other part of the car, say throwing it into reverse at 100km/h, you would do damage
     
  10. Andrew426

    Andrew426 Active Member

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    Pretty poor example there. because the car travelling at 100k has much greater inertia than if it were just the wheel travelling at 100. A better example would be to put the car on jackstands, spin the rear wheels up to 100k and then put it in neutral and use some huge unstoppable force reverse its direction. Of course that is a poor example also, but you cant compare a 1400kg car travelling at 100k to a 85gram impeller rotating at 10,000rpm.
     
  11. stocky

    stocky New Member

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    either way it will still cause damage.. Seen plenty of rooted wheels from guys that want that cool flutter sound.
     
  12. VL_5SPEED

    VL_5SPEED New Member

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    Compressor surge has been done to death for years every vl flutters/doses and im yet to see anyone report damage caused by it. There is no way in hell that the air chopping through the turbo is going to spin the turbine backwards
     
  13. Nackerz

    Nackerz Rollin

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    This is a load of ****, my mate has a vl turbo wagon, all it is, is a high comp setup running 13psi all day everyday and never had a blown head gasket!
     
  14. Nackerz

    Nackerz Rollin

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  15. VL_5SPEED

    VL_5SPEED New Member

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    It shouldnt have head gasket problems! Common problems with high comp setups is pinging which is eliminated with good fuel setup and a good tune
     
  16. Nackerz

    Nackerz Rollin

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  17. detox_nath83

    detox_nath83 Another VL Driver

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    with comp surge not really damage impeller wheel as such
    but excess strain on bearing and seals causing premature wear i would only think this in high boost aplications..
     
  18. snowybill

    snowybill New Member

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    haha thanks for all the replies guys,
    Well, I'm trying to get a final list of everything im gonna need to run this turbo..

    Exhaust (2.5 is fine i think)
    Blow Off Valve that is 'silent' ?
    Intercooler
    Turbo. Lol

    Anything else anyone would reccomend? Im probly missing something, but im kinda very hungover. lol
     
  19. VL_5SPEED

    VL_5SPEED New Member

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    Dump pipe from turbo and dump pipe to cat, vlt exhaust manifold, gaskets. Oil drain what screws into the block (i have a spair one i can sell you) and all oil and water lines for the turbo(should have them already on turbo when u buy it) then a few hoses and hose clamps...
     
  20. detox_nath83

    detox_nath83 Another VL Driver

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    Woop installing turbo tomoz guys up early and get stuck into it i will have pics up through the build..
    should all be sweet fingers crossed
     

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