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  1. #1
    is thinking. grantuk's Avatar
    Join Date
    Sep 2006
    Surrey, UK

    Ligthweight engines.....

    Moving on from talking abourt Franky Zapata's engine has anyone else tried the following???

    Rotax racing pistons -
    Are these lighter than stock?

    Carillo Rods -

    Lightened and balanced their stock crank?

    Also has anyone removed their stator and done away with the charging system?

    Will the above make a considerable amount of difference on how quickly the engine will rev?

  2. #2
    ROTAX RACING performance
    Join Date
    Apr 2005
    the ROTAX RACING pistons are lighter then stock, also have higher compression.
    the Carrillo Rods are also lightweight and more strong then oem.
    all in all lightweight engine internals are not new, and 80 % of all PRO racers run these engines sinze many years.
    I have build the first engine with that pistons in 2004/2005 they work very well. but you have to see and understand the complete conzept about high compression engines, compared to high boost engines

    the new 350 HP ROTAX RACING engine you can buy, has lighter pistons, titanium valves, lightweight rods, lightweight balacershaft, etc.
    if you buy these parts for your stock engine from ROTAX RACING you will have a very strong , fast reving engine, but you never get the factory engine.
    if you install the ROTAX Pistons you have 9.5:1 compression comare to 8.5:1 stock compression. Zapata has 11.5:1.
    the engine block is verry different from the stock block.

    Grant, you are at the wrong place to get all answer to you questions, the 350 HP ROTAX RACING engine cost 25.000 EUR, and I have customer that buy this engines, and they are member of thes forum, but all information they can find, will not get you close to the performance of that engine. and there are many ways to even increase the power of the 350 HP engine with out going turbo.

    also keep in mind, that these engines are reliable, if you service every few h, and I m not talking about Oil change

  3. #3
    danieletrono's Avatar
    Join Date
    Feb 2008
    San Benedetto del Tronto, Italy

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