NOS nozzle tap size ?
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NOS nozzle tap size ?

  1. #1
    F'ed up disease=boating Jr Jetter's Avatar
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    Default NOS nozzle tap size ?

    Couple questions for all you NOS junkies...

    1) What is the correct size for the nozzle taps ?
    2) Is this a standard size between the manufactures ?

    I have an intake off the engine, and would like to go ahead and drill / tap / and plug the intake for future NOS fogger installation. Have been looking at the NOS Sportsman Fogger kit, but that is not settled as of yet (reason for question #2). Since I dont have a nozzle in my hands yet, I have been seeing different tap sizes... 1/16 npt, 1/8 npt, and 1/4 npt... Just trying to work ahead and not pull the intake again at a later date to be drilled, then reinstalled. Would rather spend that time bending hard lines, rigging solenoids, and plumbing, etc..

    I believe it is the 1/16 npt, just looking for confirmation

    Thanks in advance for you help....

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  3. #2
    Cantard 71hallett's Avatar
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    1/16 npt is correct.
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    "The" masheenist wsuwrhr's Avatar
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    Quote Originally Posted by 71hallett View Post
    1/16 npt is correct.
    Are you sure it isn't 1/8?

    1/16 pipe is pretty small.
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    "The" masheenist wsuwrhr's Avatar
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    The placement is critical, hole angle and such. Be careful not to tap the holes too deep.
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  7. #5
    B1 Racing cs19's Avatar
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    Jr. most 90 degree nozzles are 1/16 pipe. however there are some 1/8 pipe nozzles. If you dont have your nozzles yet i would go with 1/16th.

    I woulndt go with that NOS sportsman kit. Start looking for a good price on the Edelbrock stuff with the E2 nozzles, they are very nice quality and priced very well.

    I did a Dart intake last week, i will post pics in a few minutes.

    CS
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  8. #6
    B1 Racing cs19's Avatar
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    Here is the problem you might run into. Alot of times you need to machine a pocket into the intake where the nozzle goes in. The reason for that is the manifold casting is often too thick and the nozzle threads will bottom out before the nozzle exit sides are into the runner. You need to make sure you dont run into that situation. Obviously if the nozzle is not in deep enough your going to hurt parts when you grab the button. Not to mention you will be very unhappy when you figure this out after gluing the manifold on, to do this right you need a set of the nozzles you plan on running. You may not need to machine pockets but you do need to know how deep to run the pipe tap, you could just guess and go to standard depth and pray things work out but I wouldnt do that. I would creep up on it with a pipe tap and test the fit with the nozzle type you plan on running, then install the pipe plugs, then when its time to install the nozles later down the road you know everything is going to fit correctly. You definatly dont want to not run the tap deep enough then run the tap in deeper once the manifold is on. The grease on the tap thing works but......



    Pic of the Edelbrock stuff.

    Last edited by cs19; 02-05-2009 at 08:27 AM.
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  9. #7
    "The" masheenist wsuwrhr's Avatar
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    Yea pretty much.

    I wouldn't drill or tap a thing until you get the system you are ready to run, in hand.

    It isn't that hard to remove an intake later on down the line versus scrapping or having to monkey up a perfectly good intake cause something is different.

    Brian
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    CarbGuy RumRunner's Avatar
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    You really should wait until you have the Nitrous kit in your hands:
    1) Some Nozzles are different threads
    2) More importantly some Nozzles will need to be installed at different angles
    3) You’ll want the parts in front of you so you can see where you need to install everything to make it actually fit on your engine.
    For the 45 minutes it will take you to remove your intake manifold, clean it, and prep it for work it’s not worth not doing it when you’re ready. Plus then you can make sure the nozzle sticks through the proper amount into the runner.

  11. #9
    F'ed up disease=boating Jr Jetter's Avatar
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    Thanks guys..... will just wait, remove the intake and do correctly when that time comes. Thought it was more of a standard, but guess not, oh well... especially with depths involved and such. Was just trying to save a step in the future. Appreciate the answers and the help !!

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    grumpy old guy 3boatpaul's Avatar
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    as stated in prev. post wait until you have the foggers that you are going to use. example--- eldebrock E2 direct port foggers use a 1/16 27 thd. on there's with a # D or # 14 drill size 0.242 . distance from fuel hole to first thd. is 1/2 in. and 1/4 to nos hole. distance from last thd. to fuel hole is 7/8 in. and 5/8 to nos hole. hope this helps.

  13. #11
    B1 Racing cs19's Avatar
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    Edelbrock E2's on a dart.
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    grumpy old guy 3boatpaul's Avatar
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    nice install cs-19 if you don't mind me asking , what pill's do you plan to run ?

  15. #13
    B1 Racing cs19's Avatar
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    Quote Originally Posted by 3boatpaul View Post
    nice install cs-19 if you don't mind me asking , what pill's do you plan to run ?
    Thanks.

    Its not for me but I put in .020f/.024n jetting, from there he can go to .024/.028. I run much bigger jets than that in my fogger
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  16. #14
    Senior Member stix818's Avatar
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    Quote Originally Posted by 71hallett View Post
    1/16 npt is correct.
    Ditto on this!!! We just did it!!! There's actually two different sizes 1/16" National Pipe Thread and 1/16" National Pipe Tapered. I believe the 1/16" National Pipe tapered is almost the same size as 1/8" National Pipe Thread. Also if you go to NOS website it also says 1/16"
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