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Thread: 4tech pistons

  1. #1
    Sparkie's Avatar
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    Cool 4tech pistons

    What can anyone tell us about Pro X Pistons for a 255 ski used for racing short course with a 137+ sc

    we have been using WSM but they are all out of stock, 2-3 weeks. And CP's as alternative

    only looking at .25's


  2. #2
    work great, but just like the Wiseco check the gudgeon end for clearance to the piston

  3. #3
    boost junkie skidoochris's Avatar
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    go with at least 9.5:1 pistons with that tiny blower
    the low end is greatly improved and you will make more hp at wot

    http://www.4-tecperformance.com/inde...oducts_id=2894

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  5. #4
    Eastside Powersports Slow 91's Avatar
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    CP is the best option.

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  7. #5

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    Quote Originally Posted by Sparkie View Post
    What can anyone tell us about Pro X Pistons for a 255 ski used for racing short course with a 137+ sc

    we have been using WSM but they are all out of stock, 2-3 weeks. And CP's as alternative

    only looking at .25's
    I have been using wiseco pistons and had good luck with them.

  8. #6
    RXP 260 X Short Course Veteran RXP244's Avatar
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    Quote Originally Posted by skidoochris View Post
    go with at least 9.5:1 pistons with that tiny blower
    the low end is greatly improved and you will make more hp at wot

    http://www.4-tecperformance.com/inde...oducts_id=2894
    You could be on to something there, especially for Short Course. He does need to pick up his game..........now that he has competition.

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  10. #7
    Sparkie's Avatar
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    You only got there cause the big end bolt broke and rooted the cases and crank, otherwise You RXP244 would have been First LOSER !!!!!!

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  12. #8
    SLASHER's Avatar
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    Quote Originally Posted by Sparkie View Post
    What can anyone tell us about Pro X Pistons for a 255 ski used for racing short course with a 137+ sc

    we have been using WSM but they are all out of stock, 2-3 weeks. And CP's as alternative

    only looking at .25's

    I have used Pro X many times but make sure u set the piston to bore to min 3.5 thou

    And yeah u may need to clear top of conrod for Max clearance

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