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Thread: 2001 2.4 motor with 2.5 rods and pistons.

  1. #1
    Mitsu booster
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    2001 2.4 motor with 2.5 rods and pistons.

    I've read in a few places that 2.5l pistons and t2 rods will work in a 2.4.

    I've got a set of shotpeened rods and forged wisco pistons out of my old turbo 2.5 16v (head off a DOHC neon) hybrid motor. Roughly What would the compression ratio be with them? Pisons were from FWDP.

    Would be nice and save a ton of money to be able to reuse them insted of buying new pistons.

    Thanks.

  2. #2
    Super Moderator Turbo Mopar Staff contraption22's Avatar
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    Re: 2001 2.4 motor with 2.5 rods and pistons.

    Quote Originally Posted by Ray_m View Post
    I've read in a few places that 2.5l pistons and t2 rods will work in a 2.4.

    I've got a set of shotpeened rods and forged wisco pistons out of my old turbo 2.5 16v (head off a DOHC neon) hybrid motor. Roughly What would the compression ratio be with them? Pisons were from FWDP.

    Would be nice and save a ton of money to be able to reuse them insted of buying new pistons.

    Thanks.
    Roughly 7.0-7.2:1. Pretty low.
    Mike Marra
    1986 Plymouth Horizon GLMF "The Contraption" < entertaining sponsorship offers
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    http://www.turbo-mopar.com/forums/showthread.php?69708-The-Contraption-2013-14&highlight=

  3. #3
    Mitsu booster
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    Re: 2001 2.4 motor with 2.5 rods and pistons.

    Quote Originally Posted by contraption22 View Post
    Roughly 7.0-7.2:1. Pretty low.
    That could be brought a point by shaving ~1mm off the block, I believe it was?

  4. #4
    Super Moderator Turbo Mopar Staff contraption22's Avatar
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    Re: 2001 2.4 motor with 2.5 rods and pistons.

    Quote Originally Posted by Ray_m View Post
    That could be brought a point by shaving ~1mm off the block, I believe it was?
    I guess, but if you ever wanted to upgrade to better off-the-shelf pistons and rods, which is one of the benefits of the more popular 2.4 platform, then you'd have to go and find another block.
    Mike Marra
    1986 Plymouth Horizon GLMF "The Contraption" < entertaining sponsorship offers
    Project Log:
    http://www.turbo-mopar.com/forums/showthread.php?69708-The-Contraption-2013-14&highlight=

  5. #5
    Supporting Member II Turbo Mopar Contributor Dr. Johny Dodge's Avatar
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    Re: 2001 2.4 motor with 2.5 rods and pistons.

    seems dumb to me , machining the block when you could more easily do the head
    then you still have a usable shortblock ..and a "race head"

  6. #6
    Super Moderator Turbo Mopar Staff contraption22's Avatar
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    Re: 2001 2.4 motor with 2.5 rods and pistons.

    Quote Originally Posted by Dr. Johny Dodge View Post
    seems dumb to me , machining the block when you could more easily do the head
    then you still have a usable shortblock ..and a "race head"
    Even more logical would be to use the correct rods and pistons. One and done.
    Mike Marra
    1986 Plymouth Horizon GLMF "The Contraption" < entertaining sponsorship offers
    Project Log:
    http://www.turbo-mopar.com/forums/showthread.php?69708-The-Contraption-2013-14&highlight=

  7. #7
    Boost, it's what's for dinner... Turbo Mopar Staff Aries_Turbo's Avatar
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    Re: 2001 2.4 motor with 2.5 rods and pistons.

    I also thought that people were having issues getting the harder performance bearings for the older rods. I know you can get them for a 2.4.

    Brian

    Quote Originally Posted by turbovanman
    This one is easy, I have myself to blame, I rush things, don't pay attention to gauges when I should, change to much stuff at once then expect miracles, the list is endless.

  8. #8
    Supporting Member II Turbo Mopar Contributor Dr. Johny Dodge's Avatar
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    Re: 2001 2.4 motor with 2.5 rods and pistons.

    if you know where to get the harder 2.2 rod bearings I'll take a couple of sets each std -10 and -20

  9. #9
    Boost, it's what's for dinner... Turbo Mopar Staff Aries_Turbo's Avatar
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    Re: 2001 2.4 motor with 2.5 rods and pistons.

    no i dont. i wish i did. i really havent looked hard though

    Quote Originally Posted by turbovanman
    This one is easy, I have myself to blame, I rush things, don't pay attention to gauges when I should, change to much stuff at once then expect miracles, the list is endless.

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