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fully custom air intake system

Discussion in 'VN - VP Holden Commodore (1988 - 1993)' started by CSL, Jul 27, 2006.

  1. CSL

    CSL Member

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    hello,
    ive had alot of thinking time lately, and ive thouhgt up an obvious air intake system, but ive never seen it done. i am going to build a custom sheetmetal box, for which either one or two panel filters will sit on, this will be located above the intake manifold, with it's feet onto either the fuel rail bolts or, the rocker cover bolts. from this , out the side wil be a sinlge 3 inch pipe which will curve around a full 180degrees and run into the throttle body.
    Then i will use the lowest sitting hornet scoop and make it sit a tad lower to the bonnet, cut bonet and wella, a ram air system,
    i cant see any legal implications with this system, and probally the best thing is it takes the pipe away from the extractors so less heat. So what do you guys reckon cause i'm pretty keen on this set up, and i'm leaving the place i work at soon so it needs to be finished before then (i'm going from a machine shop to maintance position(no car workings)) .
    Cheers
    Chris
     
  2. 1991_Vn2nV

    1991_Vn2nV New Member

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    Legal implication: Any forward facing bonnet scoop is illegal. If it has an opening it must face backwards, as in towards the windscreen...

    Other than that, sounds like a fair bit of work. Wouldnt it be easier to just get a VS S/C induction for $53 and then shove a POD filter in a custom box where the normal air intake is? Dont think you'd notice any real difference in power gains either between the two
     
  3. CSL

    CSL Member

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  4. 1991_Vn2nV

    1991_Vn2nV New Member

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    Ah interesting... So you can have them in Vic under those conditions. Its different in SA.

    Post those pics when ya can man, i've been thinking about doin what I said before myself, so i'd be interested to see how you did it... Also, were you happy with the gains?
     
  5. CSL

    CSL Member

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    mate ive done everything (exhaust, extractors, 65mm tb, pod, cai, cutom box/surround) over a lenghthy period of time so it doesnt feel like it's got much kick in it until i drive somthing else, or another vn, jump back in mine then i notice a difference, but this setup would look pretty nice inside engine bay aswell, i'm pretty keen actually
     
  6. PaRaDoX

    PaRaDoX Because Racecouch...

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    so kinda like a twin panel filter???

    sounds good 2x more surface area than a stock box, cant hurt the air flow, but if you do this idea why not 2xTB's doubble the air into the inlet manifold using 1x filter per tb!!!!!!!!!!!!

    ive build a custom heat shield for my pod
     
  7. CSL

    CSL Member

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    i know exactly what you mean with the twins, like two pipes coming off eeach side of the filter box and a y peice instead of elbow, but i think i'll just do the one and leave enough room on the other side of the box to do another in the future. i'll try and source a single panel filter thats just as big like from another car, and i'll custom make it to fit that, save a bit of cash. i've been thinking more and more and this could double as a dry ice box when needed. i'll get started soon, bonnet scoop is already obtained and same with paint, i have to grab some sheetmetal and some 3" pipe bits as for he rest i ahve and can obtain, it shouldnt be too hard
     
  8. fazz1977

    fazz1977 myspace.com/fazz_himself

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    All sounds very interesting. Best of luck with your project.
     
  9. commy92

    commy92 New Member

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    this is sorta what i was going to do. I was going to make a custom plenum with twin throttle bodys that sat on top of the plenum. Then chuck a pd on each. The problem i came accross was the motor is to close to the bonnet to even get the throttle bodies in there. If i had the time and the money at the moment ide probly do it.
     
  10. 253@7k

    253@7k 300rwhp supra. yay.

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    Hmmm, its the other way round in WA. Not allowd to have an opening towards the windscreen.
     
  11. coolvxss

    coolvxss New Member

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    Why wouldnt you be able to have a bonnet scoop faced forwards???? How is it illegal??
     
  12. 253@7k

    253@7k 300rwhp supra. yay.

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    From Department for Planning and Infastructure of WA.
     
  13. pandaman

    pandaman Aussie Muscle Fan

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    It's illegal in SA because their legislators are crazy. The opposite way is illegal in WA because their legislators are crazy. Either way but with a limited height is legal in NSW/ACT because our crazy legislators haven't gotten round to "fixing" it yet.
     
  14. PaRaDoX

    PaRaDoX Because Racecouch...

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  15. 1991_Vn2nV

    1991_Vn2nV New Member

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    Apparently it can be dangerous to pedestrians in case of an accident...
     
  16. Morton

    Morton For external use only

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    ... then paint the scoops flourescent yellow, so peds can duck their head to the side while they cartwheel over your bonnet toward the windscreen. >.<
     
  17. Keesh

    Keesh GM Parts tech. support

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    i think its easyer to do some plumbing down into the wheel arch, i put a hole about 60mm in diameter infront of the airbox, go some hose the same width and run it down to the front bar, instead ov running it srait into the box, i heat shelded around the area that the vn normally takes air from(behind the light) and cold ari bulds up in there for the airboc to suck in, it runs more air than the shitty ss cai's with 2 lil gaps for air to go through
     
  18. commy92

    commy92 New Member

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    i agree. Although it is illegal to cut holes in there cause its structual. What you do is get 100mm holesaw and take the top of your airbox off and chop a nice BIG hole.. Then you run a piece of 95mm pipe down from there to your front bar. DIY cold air. Cost $0
     
  19. CSL

    CSL Member

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    yah but then theres the whole structual integrity, at least with the scoop it's legal
     
  20. Stretchomatic

    Stretchomatic New Member

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    i read in another post that cutting a hole in the wheel arch is ok...but then i had a mate that put a hole in his rear wheel arch and got in crap...so i dunno...
     

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