Engine Piston Questions

Discussion in 'SN95 4.6L Mustang Tech' started by SyberSaint, Nov 7, 2013.


  1. SyberSaint

    SyberSaint Founding Member

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    Hello all,

    I have a 2002 Saleen with a series II supercharger. The engine is knocking, and I am going to pull it to have it rebuilt.
    I have an opportunity to purchase a set of new forged pistons and rods. My 4.6 is a 2 valve. The pistons I can buy are standard bore for a 3 valve....What I want to know is if they will work in my 2 valve without any loss of compression.

    Standard bore, Compression height is 1.22, intake-valve relief is -0.06, and dish depth is -0.07, clearance 0.0020...

    Any help is appreciated,
    Dale
    Last edited: Nov 7, 2013
  2. bhuff30

    bhuff30 Founding Member

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    I don't have all the answers, but a few comments that may help you in the decision.
    the valve reliefs if the 3 valve won't match the pattern on your 2v. it probably wouldn't cause interference, but may effect the quench area. Also, I think the dish volume is much less than the 2v, which would bump up your compression, whmich isn't necessarily a good thing for a blower engine.
    Last comment, the pistons are standard bore, but until the engine is torn down and checked, you can't be certain the engine can be rebuilt in standard bore.


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  3. SyberSaint

    SyberSaint Founding Member

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    Thank you for that Brian. I appreciate your response!!!

    Dale
  4. Mr. Rustypwnz

    Mr. Rustypwnz Advanced Member

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    Yeah they will work fine.

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