Wrist pin size

Discussion in 'Manton Push Rods Top Alcohol Tech Questions' started by Comax Racing, Apr 3, 2009.

  1. Comax Racing

    Comax Racing Member

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    I am in the process of getting some pistons and rods made and I need some advice on wrist pin size. This is a 540 chevy blown alky. Should be in the 2000 HP range. Micheal at MGP rods suggests a 1.094 dia x.200 straightwall tool steel pin.
    (I'm using one of his top fuel rods for longevity) My piston builder says I should be more than fine with .990 x .200 straight wall tool steel pin. Both companies can build me almost any configuration. I don't want the piston/rod to be extremely heavy but I would like some reliability.

    Thanks
    Corey
     
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  2. hemi altered 378

    hemi altered 378 Blown Altered

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    Mike is a very smart man......listen to him. sometimes you buy the best parts that are supposed to work, and you still have problems.....go with the 1.094 pin.
     
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  3. Comax Racing

    Comax Racing Member

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    Piston pins

    Thanks for the advice. I going with Mikes advice and going with the 1.094 pin and his "fuel" rod.

    Cheers
    Corey
     
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  4. anvalca

    anvalca New Member

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    wrist pins

    1.094 X 3.125 or 3.250 X .220 or .250 wall would be more adviseable. .200 wall for blown alky is a inadequate for a serious blown alky in any of the materials used to make wrist pins includinng M300.

    Anvalca
     
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  5. Don Onimus

    Don Onimus New Member

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    pins

    I can tell you that all my stuff I ever got from T. Conway had 1.156 / taper wall pins. Every engine builder I ever talked to said the wrist pin area is the weak link. Lighten the rods in non critical areas. And use a bigger pin. Just my thoughts, for whatever it is worth. Everyone has there own ideas. Good luck Don
     
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