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  1. #1
    2006 Turbo RXP boBO's Avatar
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    lightweight connecting rods

    Hi guys
    Is it MUST to rebalance the crankshaft when installing lightweight connecting rods and pistons or I can direct install them on the OE crank shaft
    Thanks


  2. #2
    Eastside Powersports Slow 91's Avatar
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    i would. but i have ran 4 cylinders unbalanced and had slight vibrations at certain RPMs but the motor has held up fine so far.

  3. #3
    2006 Turbo RXP boBO's Avatar
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    That was with 4 cylinders What about SD 3cylinders

  4. #4
    JPR's Avatar
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    theres no point running lightened rods unless you lighten the crank...

  5. #5
    Eastside Powersports Slow 91's Avatar
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    Quote Originally Posted by jaffabas View Post
    theres no point running lightened rods unless you lighten the crank...
    ? We have built the motor in the Worlds Fastest Chrysler 420A NA ( not the Neon SRT4 motor). We swaped out the forged rods for a set of custom GRP Aluminum rods. The Aluminum Rod and Poston combo weight less than a Forged rod by itself. The car rev's a shit ton faster now and its running a bone stock unlightened crankshaft.

  6. #6
    1-877-JET-PROS BigBoost's Avatar
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    Quote Originally Posted by boBO View Post
    Hi guys
    Is it MUST to rebalance the crankshaft when installing lightweight connecting rods and pistons or I can direct install them on the OE crank shaft
    Thanks
    Yes 100% need to rebalance, from the factory the engine is balanced to the rods and pistons when you change the rods or pistons you just changed the rotating assembly weight and at high rpms it will make a difference. By using riva pistons and lightened rods you will see upwards of 3 lbs of rotating loss over stock internals.

  7. #7
    CC Racer kenshin89's Avatar
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  8. #8
    2006 Turbo RXP boBO's Avatar
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    Thanks guy

  9. #9
    dnielsen's Avatar
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    Quote Originally Posted by boBO View Post
    Thanks guy
    Some guys swear by it and others dont. If your going that far into the engine why skimp on ballancing the rotating mass. Box it all up and send it to Falicon out in Florida, they are familular with the 4-tec. As far as lightning the crank thats preference but dont skimp on the ballance job.

  10. #10
    JPR's Avatar
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    Quote Originally Posted by Slow 91 View Post
    ? We have built the motor in the Worlds Fastest Chrysler 420A NA ( not the Neon SRT4 motor). We swaped out the forged rods for a set of custom GRP Aluminum rods. The Aluminum Rod and Poston combo weight less than a Forged rod by itself. The car rev's a shit ton faster now and its running a bone stock unlightened crankshaft.
    thats a car with more then three rods ! your talking apples and oranges. big difference from a loaded pump. its a waste of time unless you lighten the crank and pistons IMO then it will spin up quicker.

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