New Piston Prototype Design With No Outside Wrist Pin Hole
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  1. #1
    Resident Guru JC-SuperJet's Avatar
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    New Piston Prototype Design With No Outside Wrist Pin Hole

    This helps minimize the "Short-Circuiting" thru the Wrist Pin Hole (cross-mixing and flow disruption of fresh Intake Fuel Mixture) that happens when both Exhaust Port and Transfer Ports are open.

    Cool Idea: https://www.youtube.com/watch?v=YEaE6BHyjzg

    Perhaps, it would be cheaper to cap the Wrist Pin Holes...

    Pro Engine Builders please provide feedback on these ideas. Thanks.

  2. #2
    Resident Guru JC-SuperJet's Avatar
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    Re: New Piston Prototype Design With No Outside Wrist Pin Hole

    Maybe produce a "Wrist Pin Welch Plug"?

    Does the Wrist Pin need Internal cooling from the Fresh Fuel Mixture?
    Last edited by JC-SuperJet; 10-20-2018 at 01:56 PM.

  3. #3
    PWCToday Guru matt888's Avatar
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    Re: New Piston Prototype Design With No Outside Wrist Pin Hole

    The big thing is so the piston does not have to be cam ground and can be perfectly round, pretty cool idea.

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  4. #4
    Resident Guru JC-SuperJet's Avatar
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    Re: New Piston Prototype Design With No Outside Wrist Pin Hole

    Found out that the Aircraft Industry has been using Piston Pin Plugs for a long time now. Also, Hot Rodders and even Harley Davidson. Piston-type Compressors too. They use them in lieu of Retainer Clips.

    Harley Davidson actually uses Teflon Buttons that are in contact with the Cylinder Walls. No Ports to snag on, so must be for 4-Cycle Engines.

    I'm going to test these Teflon Plugs one day when I get my hands on a Sacrificial Engine see if there is any performance gain.

    Pin Button versus Retainer Clip.jpg
    Piston Pin Plug Aircraft 3.jpg
    Wrist Pin Buttons JayCee Aluminum fits Wiseco Pistons.jpg
    Wrist Pin with Teflon Buttons.jpg
    Last edited by JC-SuperJet; 10-20-2018 at 06:43 PM.

  5. #5
    PWCToday.com Is My Home Away From Home Waxhead's Avatar
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    Re: New Piston Prototype Design With No Outside Wrist Pin Hole

    Looks pretty cool, especially the one where the ring no longer has a pin so you can have a rotating ring there
    Www.waxracingproducts.com
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  6. #6
    Top Dog 800wildcat's Avatar
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    Re: New Piston Prototype Design With No Outside Wrist Pin Hole

    How can you have a rotating ring not snag on a port?
    '99 STX 1100/1200 triple pipe, 48 NOVI's, Cold Fusion head, ported, Kaw race ign, Skat pump, drop nozzle, light seat, carbon hood; '97 STX 1100 Cold Fusion head, ported, modded stock exhaust, timing advance; '86 X2 Westcoast pipe, WC 180 psi head, 38 dual Mikunis, ported, MSD; '87 X2 Kerker manifold, PJS pipe, PJS 190 psi head, dual 38's; '87 X2 stock w/ 44 carb, pontoons; '95 X2 750 project; Johnny O's supercharger; 650 MRD fuel injection, must sell enough to keep wife happy.

  7. #7
    Top Dog 800wildcat's Avatar
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    Re: New Piston Prototype Design With No Outside Wrist Pin Hole

    I'm thinking if you don't have auxiliary exhaust ports, the performance gain would be minimal.
    '99 STX 1100/1200 triple pipe, 48 NOVI's, Cold Fusion head, ported, Kaw race ign, Skat pump, drop nozzle, light seat, carbon hood; '97 STX 1100 Cold Fusion head, ported, modded stock exhaust, timing advance; '86 X2 Westcoast pipe, WC 180 psi head, 38 dual Mikunis, ported, MSD; '87 X2 Kerker manifold, PJS pipe, PJS 190 psi head, dual 38's; '87 X2 stock w/ 44 carb, pontoons; '95 X2 750 project; Johnny O's supercharger; 650 MRD fuel injection, must sell enough to keep wife happy.

  8. #8
    PWCToday.com Is My Home Away From Home Waxhead's Avatar
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    Re: New Piston Prototype Design With No Outside Wrist Pin Hole

    if the ring is a solid loop then its not an issue
    Www.waxracingproducts.com
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  9. #9
    Resident Guru JC-SuperJet's Avatar
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    Re: New Piston Prototype Design With No Outside Wrist Pin Hole

    Wax, how are continuous Rings installed? Heat expand the Rings, Cold shrink the Pistons?

    Would be great to eliminate Locating Pins that can fall out, and snagging Rings.
    Last edited by JC-SuperJet; 10-21-2018 at 11:33 AM.

  10. #10
    PWCToday.com Is My Home Away From Home Waxhead's Avatar
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    Re: New Piston Prototype Design With No Outside Wrist Pin Hole

    You need to look at his other videos, in revision two of the pistons he makes the skirt screw on and off
    Www.waxracingproducts.com
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