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Thread: Thread on New Age uppipe sensor boss?

  1. #1
    AndrewC
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    Question

    Can't remember if it's for EGT or O2 but I know there's a threaded boss on there.

    I haven't got the uppipe yet but I need the thread spec to order a compression fitting for the thermocouple I'm going to use for measuring EGT.

    Andrew...

  2. #2
    JIM THEO
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    I can't help you on this Andrew but if you didn't know it there are up pipes with two bosses for EGT and O2 sensors available on the market.
    JIM

  3. #3
    AndrewC
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    Thanks JIM,

    I happened on a little used H&S uppipe for a good price so bought it, I think these only have 1 boss which is all I need.

    It may be a little while before I get the uppipe and I'd like to have the EGT sensor fitting waiting for it.

    Andrew...

  4. #4
    22B Junkie
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    I think, but can't be sure, that it's for an O2 sensor, and it's an M11 thread...it's quite large, certainly much larger than the typical 1/8th bsp that EGT bosses use!

  5. #5
    AndrewC
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    Looks like its 1/2" or 7/16" BSP, its 20tpi according to my thread gauge, I'll go down to my local hydraulics specialist (my Dad) and see if they have anything to fit.

    Andrew...

  6. #6
    Pblamire
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    I think it's an M12 thread of some sort, perhaps M12 fine. THe standard exhaust studs are 5/16" UNF I think. so you could try one of those.

    paul

  7. #7
    AndrewC
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    Thanks Paul,

    Haven't had chance to try anything yet, forgot pop's away this w/e and I'll never find anything if he's not there!

    Andrew...

  8. #8
    Senior Member ScoobyDuck's Avatar
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    bringing this to the top as i've got a helix (i think) uppipe with an EGT hole, which i cant work the thread out on..

    again it looks like 7/16th 20tpi but its really loose until you tighten it fully down.

    did you work out what it was ?

    and what to use as
    a) an adaptor to 1/8npt
    b) egt k-type boss?

    as i need to move the egt to pre-turbo really..

    cheers
    Steve

  9. #9
    22B Janitor Crew Steven's Avatar
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    weld it up and then drill and tap it for 1/8npt

  10. #10
    Senior Member ScoobyDuck's Avatar
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  11. #11
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    lol

    It's metric fine fella

    dia I'm not so sure on so will keep quiet on that.

    Mind you, welding the right boss on sounds a hellava lot easier... if you can weld of course.

    Andy

  12. #12
    Senior Member ScoobyDuck's Avatar
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    thats the problem Andy (&Steven) coz it is SS i dont want to just take it to somewhere that has a mig etc.. dont sure on SS welders around here.

    also, it has a nice big tapped hole, so why not use it.

    metric - really? we couldnt find a thing to fit it that was, 7/16 was nearest.

    fine - yep agree on that one [img]smile.gif[/img]

    need someone with EVERY conveivable tap ! [img]tongue.gif[/img]

  13. #13
    22B Junkie
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    FWIW.. Steven, its quite hard to drill and tap a weld

    Steve, who gives a fook if its migged.. its only a little bit of rust that may weld!!

    Or you could just get a small roll of ss welding wire.

    David

  14. #14
    22B Janitor Crew Steven's Avatar
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    I was suggesting that way, because that is exactly what i did with my Gruppe S flexi up pipe over 2 years ago, which did a good few thousand miles with no problems.

    I just migged up the hole, starting as far down as i could, then just re drilled incrementing the bit size gradually, and then tapped it with 1/8npt for the defis egt.

    i then filed the rough bits off the inside of the pipe.

    Took me an hour if that.

    If i can weld it up satisfactorily, then anyone can.

    Steven

  15. #15
    Senior Member ScoobyDuck's Avatar
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    time to find a welder then !

    unless Andrew found a boss ?

  16. #16
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    Magnex up pipes come with a bag of bolts for "hole filling" but alas a loose one one day didn't so had to go across the road to the bolt supplier. 90% sure it was metric fine.
    Although as Tim said in another post, I could have Pox on the brain as well.

    Andy
    Andy C, Always in it, just the depth that varies.

  17. #17
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    The thread is 12x1.25mm.

    I can send you a bolt if you like, is it Ok to put it in with Iain's WB sensor?

    Andrew...

  18. #18
    22B Junkie
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    Steven, I know but sometime it can be a right pain in the arse.. not for the feint hearted that just try and force their way in with the correct sized drill bit, hmm that sounds like you [img]tongue.gif[/img]

    Also carbon steel taps dont really cut it (pardon the pun!)

  19. #19
    Senior Member ScoobyDuck's Avatar
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    Andrew .. is it ? [img]redface.gif[/img]

    bolt would be good (and yeah,ok) but i then need a boss or something! what did you do?

  20. #20
    22B Janitor Crew Steven's Avatar
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    FIIBR

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