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Thread: Pre-Turbo Water Injection - Works!!!

  
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    MikeWarner's Avatar
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    Thumbs Up Pre-Turbo Water Injection - Works!!!

    Well, I just fitted a 0.3mm water injection jet before my turbo with good results. I also have a 0.4mm jet after the turbo just before the plenum.

    My ECU will log a fault code and cut boost if it sees over 20psi. I set my actuator to 20psi exactly and I've never had a high boost problem. After installing the jet today I went for a drive. The first time I put my foot down, the ECU light comes on and the boost is instantly cut.

    What this tells me it that cooling the charge before the turbo does make the turbo more efficient. This is because the cooling effect makes the air more dense before it goes into the turbo, thus the turbo has to do less work to produce the boost required. As I left the actualtor where it was, the turbo was doing the same amount of work, so was producing more boost, more than 20psi!

    This means you could run more boost without making your turbo work harder!

    Nice!
    8 Astras in a row! Can Anyone Beat That?
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    mattcoupturbo's Avatar
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    Awesome, so were did you fit the jet? as you've done the 2.2 mod haven't you? was it in the 45' section of hoses just before the turbo?

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    MikeWarner's Avatar
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    Yes it was.
    8 Astras in a row! Can Anyone Beat That?
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    ADY JONES's Avatar
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    A question Mike would water injection affect the internals of the turbo ? Not got a clue on the subject mate.

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    Apparently prolonged use can damage the turbo, but I am only going to use it for Santapod and track days. I've fitted a valve so that I can turn it on and off at will. It is not 100% that it causes damage though, apparently can erode the edges of the compressor blades. It is unsure that observer erosion was the effects of the WI or would have happened anyway.
    8 Astras in a row! Can Anyone Beat That?
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    The water can effect the bearings too, but the damage chances are minimal imo. The majority will obviously evaporate in the heat involved, but what is left can effect the turbo, as mike says with prolonged use.

    Good work though mike, sounds like your well on your way to the 350 mark !

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    ahem..... 400bhp.
    8 Astras in a row! Can Anyone Beat That?
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    BenC's Avatar
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    Quote Originally Posted by MikeWarner
    ahem..... 400bhp.

    you need to be spending money in other areas if you want 400bhp..
    Corsa C LEH 4x4?

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    What would also be interesting is what impact running the pre-turbo WI would have on your torque?

    I guess that running Meth though is not an option as it would probably detonate with the heat.

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    K3FUS's Avatar
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    How's the fuel trimming coming on Mike or is it abandoned for the time being?

    I have refitted my WI jet adaptor into the hose between the FMIC and the rigid outlet pipe, jet got to fit it and turn it back on.

    Jon was saying someone has a spray bar fitted on thier GSi with a FMIC, waiting for the results of that too.

    Does the 2.2 air flow mod help in any way?
    Tell me what you've done, not what you're going to!

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