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  1. #1
    HORSEPOWER JUNKIE 9secZO6's Avatar
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    4-tech differences

    4-tech part interchangability? Besides the s/c hole in the pto being blocked off, and the compression and use of forged slugs, what else is different? Are the cases the same? Rods and crank, same or not? And, if the pistons are different material and weight, does the crank differ or the counter-shaft? The non-s/c 4-tech parts seem to be plentiful and cheaper than s/c version of the same parts in a used cond. Thanks in advance....I can always count on green super-heroes and his family


  2. #2
    Matthew K ReDevilRXP's Avatar
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    I know the N/A RXP motors have cast pistons vs the Forged ones that come in the Sc'ed Rxp's

  3. #3
    HORSEPOWER JUNKIE 9secZO6's Avatar
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    yea, that and the pto cover, but I need to know what they do about the piston weight difference and is the crank/balance shaft the same..ie: do I need to rebalance and can I use s/c pistons on the non-s/c crank? We need a guru to step in......

  4. #4
    cbrich's Avatar
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    You would want to have the engine rebalanced when replacing the pistons. No for sure about the crank.

  5. #5
    HORSEPOWER JUNKIE 9secZO6's Avatar
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    Well, thats just it, when u go from cast to forged, u gotta ADD weight to the crank.....I feel like I own more mallory per engine than anyone

  6. #6

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    Why? Just trade.

  7. #7
    HORSEPOWER JUNKIE 9secZO6's Avatar
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    I just did some oem research block, crank, bal. shaft, and con rods all same part # gtx-n/a to rxp s/c the pistons have a different # and are 2x the price for the forged. This answers my questions concerning the use of n/a block and components for re-builds....

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