1000+ RWHP - Wrist Pin Questions

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  1. #1
    Member Array dj94gt's Avatar
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    Default 1000+ RWHP - Wrist Pin Questions

    Oliver Connecting rods offers two wrist pin diameters in their rods. Factory .866" and the SBC .927" pin....When (if ever) would it be necessary to run the larger pin in a 5.4L TT engine? Engine will probably make 1100-1200 RWHP with a 7500 RPM redline. Please post your answers. Keep it technical please.

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    Supporting Vendor Array Mod Mustang Racing's Avatar
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    Quote Originally Posted by dj94gt View Post
    Oliver Connecting rods offers two wrist pin diameters in their rods. Factory .866" and the SBC .927" pin....When (if ever) would it be necessary to run the larger pin in a 5.4L TT engine? Engine will probably make 1100-1200 RWHP with a 7500 RPM redline. Please post your answers. Keep it technical please.
    This pin OD is not as important on the ID, the common OD is .866, this will fit most pistons on the market, the ID for 1000 RWHP should be in the .180 range or larger. We run the .866 pins in all of the MMR competition cars, 1 of which makes over 3000HP and recently broke John Mihovetz MPH record for the worlds fastest Modular (our MMR Pro mod), this one uses a .866, 9310 material with a .220 wall thickness.

    Best of luck with your project, let us know how we can help!

    www.modularmotorsportsracing.com


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    Member Array dj94gt's Avatar
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    I couldn't get wrapped around using a larger heavier pin, when I've seen guys making 1500HP with a 9310 heavy wall unit as you described above....Thanks for the input.

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    Supporting Vendor Array Mod Mustang Racing's Avatar
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    Our pleasure! As you have clearly noted, a pin should only be as heavy as needed to handle the power, everything else is wasted on parasitic loss, best of luck again!

    Mark
    MMR

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    Kurgan Motorsports Array
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    derek, you cant have too thick of a wrist pin!

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    Member Array dj94gt's Avatar
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    I have some questions for you whenever you have time available. Seems as though my setup will be fairly close to the combo in the shop car.

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    Senior Member Array 03yllwcobra's Avatar
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    I am going to run a .205 wrist pin for my engine, I am looking to make 1200rwhp thru a th400.

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    I use a .220 9310 pin from Trend. Very stout pieces and decently priced as well.

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