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Thread: EFI twin snorkel setup

  1. #1
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    EFI twin snorkel setup

    Hi all tomorrow ill start my custom snorkel setup, so my question is firstly is 3" enough air feed for a 4.2 stroker motor, if not ill be building a custom airbox and run twin snorkels but my problem is that my car has very little room under the bonnet left so the airbox is easy enough but im wanting to know whether anybody has done such a job and do you have pictures.
    Thanks Tim

  2. #2
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    i used to have twin snorkels when i had my 6.5 chev, i made a drivers side version of the ones Les Richmond Automotive do, went to the trouble of making a dummy one then had a mold made so i could get fibreglass ones made. May have some pics somewhere. Still got the mold and may even have a snorkel left over.

  3. #3
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    if you have pictures that would be really good, i bought all the alloy tubing about 18mths to 2yrs ago to make a twin snorkel setup for my old carby motor which was going to be easy but this is looking to be a little more diffcult

  4. #4
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    Hi I believe that 3" is fine, as the origianal "Holden" 253 4.2 ltr's air cleaner had a intake of about 1 3/4 - 2" if it was lucky in the round type air cleaner. So a stroked LR motor of the same size is still going to pull the same CFM and at 5000 rpm there lucky to move 350 CFM
    BUT I fitted twin snorkel to my x 86 range rover just cause it looked tuff. ;-). Gary

  5. #5
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    Quote Originally Posted by Gary S11 View Post
    Hi I believe that 3" is fine, as the origianal "Holden" 253 4.2 ltr's air cleaner had a intake of about 1 3/4 - 2" if it was lucky in the round type air cleaner. So a stroked LR motor of the same size is still going to pull the same CFM and at 5000 rpm there lucky to move 350 CFM
    BUT I fitted twin snorkel to my x 86 range rover just cause it looked tuff. ;-). Gary
    Yeah im thinking the same with the tuff look too, it was on my plans for the old motor so i think i should stick to it and do it with this engine also, do you have any pics of the engine bay? or air cleaner setup
    Thanks Tim

  6. #6
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    Hi Tim as mine was a 3.5 carby mod I just ran a pipe from either side and "tee'd it in to the front tube of the std air cleaner, but if yours is any thing like my 3.9 disco there isn't the room with the EFI but I will try to find some pic they will be on the LROCWA site.. Gary

  7. #7
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    yeah i did the 3.5 stroker conversion and 5spd out of an early disco 12mths ago but just getting around to finishing the little bits off, and ill have to look at setting up a twin outlet airbox and possibly move some stuff around like the disco washer bottle etc, as it was i didnt have enough room for my second battery under the bonnet because of the std airbox so thats in the cab now

  8. #8
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    Hi again if you go to this link it should take you to my old for sale add with pics
    LROCWA Forum

    Gary

  9. #9
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    Quote Originally Posted by Gary S11 View Post
    Hi again if you go to this link it should take you to my old for sale add with pics
    LROCWA Forum

    Gary
    Thanks Gary it looks alot more simple on that than i thought,

  10. #10
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    Are you going to graft a couple of plenum chambers together and have twin throttle bodies to go with the twin snorkels?
    My home-made 3" snorkel fed plenty of air to my EFI 4.4 and now does the same to a 3.9

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