Boost pressure

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Jleippi, Jun 10, 2024.

  1. Jleippi

    Jleippi Bobtail Member

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    Hello I have the n 14 celect plus . I’m interested in measuring the boost it’s making. Anyone know how much boost it should have ? And does the boost pressure sensor give a code if it’s out of spec ? I thought about installing a gauge , can I install the gauge directly after the turbo or does it have to be near the intake manifold?
     
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  3. AModelCat

    AModelCat Road Train Member

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    Probably have to post the CPL number if you want to know the boost spec.

    I'd check the intake manifold and piping near it for a bung you can plumb in to for a gauge.
     
  4. Jleippi

    Jleippi Bobtail Member

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    I saw a bung right after the turbo before the intercooler . You think that would work?
     
  5. beastr123

    beastr123 Road Train Member

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    The closer to the turbo the less a gauge will detect and quantify a leak.
     
  6. SmallPackage

    SmallPackage Road Train Member

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    Best to plumb the manifold pressure gauge in the intake manifold that way it is showing exact boost going into cylinders and like @beastr123 said it will detect any leaks from turbo to that point. There should be a bung plug or two in the manifold to use.
     
    Deere hunter Thanks this.
  7. Jleippi

    Jleippi Bobtail Member

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    Mar 6, 2024
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    Ok I might have to buy a new gauge. The one I have maxed out at 35 psi
     
  8. SmallPackage

    SmallPackage Road Train Member

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    Thats the norm. Most gauges only go to 35. Just remember you want to operate them older engines in a way where it will “breathe” less boost means less heat and less fuel used. If you have to peg that gauge to make the engine pull you got it working way too hard.
     
  9. Jleippi

    Jleippi Bobtail Member

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    Mar 6, 2024
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    Got the gauge hooked up it’s maxing at about 24 psi . I think this n14 celect plus is turned down to 360 hp instead of the 525 hp it’s capable of .
     
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