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    #11
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    matthew_henson's Car Details
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    One of the best places I would suggest is in the pipe that runs from the intercooler to the EGR valve it will provide the truest reading short of the inlet manifold. It is made of aluminium so you could easily drill and hole and weld on a nut to hold a sensor or gauge feed
     
     

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    #12
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    Xmak 330d's Car Details
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    I tapped into the egr with a union for my boost guage. 2002 E46 330d - Boost gauge
     
     

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    #13
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    Xmak 330d's Car Details
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    Quote Originally Posted by welshspiky View Post
    hi i had my car rr yeasterday and it made 166bhp and 218 tourqe but we couldnt find any boost pressure. we tapped into the vacum pipe on the throttle body, one coming of the tubo and one coming of the inlet manifold. the best we could get was -0.9 bar of pressure. any ideas what could be the problem oh and the figures were at the fly.
    thanks
    mike.
    Think there's some crossed wires in this thread?

    Mike are the RR figures at the Flywheel 166bhp? (that's how I've read it)

    -0.9bar in the vacuum system that you've tested is bang on, but that's not guaranteeing the variable vanes of the turbo are operating properly?

    Diagnostics will tell you the boost pressure, providing the MAP sensor is working correctly. Manually testing with a guage is still the most reliable IMO.
     
     

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    #14
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    bimmer320's Car Details
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    With a diesel you cant tap into a vacuum line as you would with a petrol to read boost as they don't produce a natural vacuum due to the lack of throttle body. You need to tap directly into inelt system to get positive pressure reading. I too did what xmak did by tapping a hole and fitting a union in the egr body.

    330ci clubsport
     
     

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    #15
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    dead_valentine's Car Details
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    +1 on the MAP sensor for boost pressure. It's pointless doing it any other way. Why do you think the MAP is where it is? Prime position for measuring boost!
     
     

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