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Thread: T Piece ???

  
  1. #1
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    Andyo888's Avatar
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    T Piece ???

    i have order 3 different guages to go in my dash..... they each come with a t piece! i understand the fitting to the pipes etc.
    BUT
    i need to run 3 guages off of a vacuum pipe!if i run the 3 t pieces in parallel (one after another) will i get different figures etc etc
    CAN ANYONE HELP
    Astra 888
    Number 72
    280 bhp and 320.2 torque

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    KrisC's Avatar
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    Why... Are they all Boost Gauges...lol
    Astra SRi Turbo
    281|317

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    Andyo888's Avatar
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    one is a psi guage, one is a bar guage and the other is a vacum guage 0-76cmpg (i think)
    Astra 888
    Number 72
    280 bhp and 320.2 torque

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    Ffoeg's Avatar
    2170:01:06
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    why do you need three gauges telling you the same thing in different units?

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    the vacum guage tells u something different to the bar and psi guages,

    A vacuum gauge is one of the most useful gauges you can install and shows the difference between outside atmospheric pressure and the amount of vacuum present in the intake manifold. The pistons in the engine serve as suction pumps and the amount of vacuum they create is affected by the related actions of:
    · Piston rings
    · Valves
    · Ignition system
    · Fuel control system
    · Other parts affecting the combustion process (emission devices, etc.).
    Each has a characteristic effect on vacuum and you judge their performance by watching variations from normal on the gauge. It is important to judge engine performance by the general location and action of the needle on a vacuum gauge, rather than just by a vacuum reading which moves in line with your engine revs.
    Astra 888
    Number 72
    280 bhp and 320.2 torque

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    Ffoeg's Avatar
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    I know all that, but virtually all boost gauges be they psi, bar, Kpa or cmhg (or whatever) show vacuum as well - ie negative boost

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    well with the vacuum guage i'll be able to keep a better eye on any problems coz im fed up with chucking money at my car lol
    my 2nd vxr turbo got delived today!!! thank god for credit cards
    Astra 888
    Number 72
    280 bhp and 320.2 torque

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    Fair enough

    And to answer your original Q, they will all need a seperate T-piece fitting to a pipe, and as the pressure will constant through out the pipe, they won't be affected by each other.

    However you could T off the engine vacuum pipe for one gauge, and then T off that feed for that gauge to feed another one (or two)

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    thatnx for your help, i was going to run it off the 2 vacuum pipes i know of!
    i was considering a oil pressure guage but i replace my oil every 4months,so didnt c the point
    Astra 888
    Number 72
    280 bhp and 320.2 torque

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