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  1. #1
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    Default waterspray - worth it or not?

    I am considering whether or not to fit a waterspray to the FMIC that I am putting on my Q4. My only application for it is track use where the average time on the track is approx in 15 min segments.

    I have read a lot of articles on the net about them, but i have found *no* proper comparative test data that shows them leading to higher power and hence lower lap times.

    I would not need an intelligent controller - as i would run the thing continuously as the races are short - so it will be simple - container / tube / nozzle / pump / switch.

    but if it wont actually produce more power its not worth bothering with..

    any opinions or test data/

    thanks, jim.

  2. #2
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    Default

    I would advise finding out whether you need one or not first.....

  3. #3
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    Default

    do you have a way of monitoring air temperature after the intercooler? to give you an idea (stolen from squadra website):

    Boostcontroller + aangepaste chiptuning : 60 graden

    Front mount intercooler + boostcontroller + aangepaste chiptuning: 35 graden

    this theoretically means about 5% more fuel can be injected, so 200 bhp becomes 210-ish

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  5. #5
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    Default

    I've got the Autospeed kit and did a few tests with it :

    Intercooler tests
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  6. #6
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    Default

    Thanks, Steve / whizzman - I had read the autospeed article - i must say that it is not really encouraging!

    jimn~

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    Default

    The autospeed controller is biased towards road use. To be honest for track use a decent nozzle, pump and water reservoir would do the trick just as well. Switch it on as you go on track, off when you finish.
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

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    Default

    thats my plan - very simple!

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    Default

    Quote Originally Posted by Steve Webb View Post
    The autospeed controller is biased towards road use. To be honest for track use a decent nozzle, pump and water reservoir would do the trick just as well. Switch it on as you go on track, off when you finish.

    If you are going to do this then you will need to carry about 50 litres of water and the weight gain will outweigh any power gains...

    The Autospeed device is the best on the market, it fires the water spray when it is needed which is something a human will never know. You also have enough to contend with when driving without flicking water spray switches on and off whilst not even knowing if it is doing any good or not.

    At best a water spray is a crutch for a badly specced intercooler.

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    Default

    Steve, in your web page you described that you put a temperature sensor behind the intercooler. Is this in the engine inlet? Or is it in free air behind the intercooler?

    In the end, what matters is the temperature of the air after it has passed the intercooler and the restriction of flow by the intercooler. It's nice to know that air behind the intercooler is actually warmer, the hotter the better, that means that heat is transferred from the inlet to outside.

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    I am thinking about making my stock IC watercoolered, not the series1 electronic one but a more simple version which is using the windscreen washer tank, the question is what kind of nozzle do I need for that ?
    1995 Alfa Romeo 155 Q4 , 1995 cc Standard Standard Black

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