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3.8 stroker with a 4.2 crank?

Discussion in '1994-2004 V6 Mustang Tech' started by StangRacing99, Feb 1, 2008.

  1. mustang2k00

    mustang2k00 No guts no glory

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    While staying on the original post, does anybody still sell the oem 4.2 ford crankshaft? I'm having problems finding anybody that sells it. The most common link in the past is now dead.
     
  2. roach419

    roach419 New Member

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    I found mine on ebay for less than 130

    Sent from my Nexus S 4G using Tapatalk 2
     
  3. mleega1

    mleega1 New Member

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    Can this swap be done with an 86 block and heads?
     
  4. Harper

    Harper Member

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    Bump

    Great thread! I have learned a great deal tonight reading this.

    Any info on how much hp a stock ford 4.2 crank can handle?
    Thanks
     
  5. 6 Shooter

    6 Shooter Well-Known Member

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    Around 550+ rwhp, if everything is working correctly and no misfires. This assumes a belt driven blower. A turbo, probably 650+ whp.
     
  6. Harper

    Harper Member

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    nice. I think i know were a fleet of 4.2 trucks are at a local scrap yard. I may see if i can get a couple engines, intakes :) for future projects! :)
     
  7. Comerideinmypony

    Comerideinmypony New Member

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    I'm new to this world but I want to delve right in. They fly wheel, does it need to be one for the 3.8 or 4.2?
     
  8. 6 Shooter

    6 Shooter Well-Known Member

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    The 4.2L cranks were neutral balanced. The 3.8L cranks were neutral balanced from 01--04. Thus the flywheels for those cranks need to be neutral balanced and have NO counter weights.
     
  9. Truefate

    Truefate New Member

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    Resurrecting this way old thread. I've got a 2000 mustang that needs a rebuild. Seems stupid not to upgrade. Two questions. First (I believe this has been answered but perhaps not) this is a 2000, do I just need a flywheel and harmonic balancer to balance it? I'm trying to avoid machine shop coast as much as possible. Second, I am assuming this will require a computer reprogramming, is that correct?
     
  10. 6 Shooter

    6 Shooter Well-Known Member

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    What sort of upgrade? To a 4.2L? If yes, the 4.2 has a neutral balanced crank which will need a new flywheel without counter weights, plus a neutral balanced harmonic balancer.