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  1. #1
    rxpdoo's Avatar
    Join Date
    May 2006
    Trinity, Florida, United States

    two intercoolers

    i am just wondering. when you remove the stock intercooler there is a void left that that i believe is counterproductive for airflow. how about reinstalling the stock intercooler, tap 1/2 inch waterline for this intercooler and also running the riva intercooler with the other stock waterlines. i think it would serve 3 purposes- increase airflow, increase cold air, increase boost. i know nils is working on a bigger intercooler but why not use what you already have from the factory.

  2. #2

    Join Date
    Apr 2005
    Elysian Fields,Tx
    That sounds like a good idea but it really doesn't work. The stock intercooler is too restrictive and you really defeat the whole purpose of the aftermarket intercooler. There is a lot of input on this void and problems it could cause. I'm sure someone will come up with aftermarket intake before long.

  3. #3
    Site Admin Green Hulk's Avatar
    Join Date
    Apr 2005
    Morgan City, LA
    Bari, this has been done before and actually killed performance.

    Intercoolers are restrictive. Throw two in the mix and you kill air speed.

    The stock intercooler is extremely restrictive.

    I did a test with my wifes RXP. I measured the boost with the stock intercooler and then swapped to the Riva intercooler and actually gained 1 psi more boost.

  4. #4

    Join Date
    Jan 2006
    Rydal, Georgia U S A
    The stock IC is so restrictive that;if you remove it in water temps 80 and above, you'll gain at least 100 rpm.

  5. #5

    Join Date
    Jun 2005
    rome ga
    The throttle body is like 52mm the opening to the stock intercooler is only 44 and too thin to bore. Smaller than most carbs. Guess thats like taking off 44mm carbs and adding 52mm just by removing the stock intercooler.

  6. #6
    mtrager's Avatar
    Join Date
    Jul 2006
    Orlando, Florida, United States
    That also explains why you get 3mph.

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