Max Wedge pistons

1962 - 1965 Mopars

  1. Daytona Jim

    Daytona Jim Well-Known Member

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    Building a 426 Max Wedge 11:1 engine, I'm not finding pistons listed with any of the big piston mfgs. Does anybody know of a supplier for these? Thanks, Jim.
     
  2. Polara426

    Polara426 Well-Known Member

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    No one makes a on the shelf good piston for the 4.25 bore for that stroke guy's will tell you to build a 440 as the piston selection is much better. If you have to build a 426 get custom pistons from a good source it will be cheaper in the long run. There is a company that sells factory style cast pistons about 10 to 1 but they are boulders I ended up putting in lighter pins and spending to much for heavy metal to balance the crank. Every once an awhile you see factory 11 to one forged pistons come up but they usually are not cheap.
     
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    • 6t4polara

      6t4polara Well-Known Member

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      Hughes engines lists 426 wedge pistons.
       
    • lewtot184

      lewtot184 Well-Known Member

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      the original 11:1 pistons were made by TRW. to my knowledge they haven't been reproduced in decades.
       
    • 67BELRO

      67BELRO Well-Known Member

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      You run a 6.9 eagle rod with a 383 11.0 to 1 KB piston. are you can send me a PM and I can sell you some 64 parts
       
    • Yournewtreasureawaits

      Yournewtreasureawaits Well-Known Member

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      Jim,

      I think I have a set of LC pistons TRW's
       
    • moparsquid

      moparsquid FBBO Gold Member FBBO Gold Member

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      the last time I looked I think bob mazolini had them for sale
       
    • 63SPF

      63SPF MOPAR 4 LIFE ! MOPAR OR BUST ! PLYMOUTH'S RULE ! FBBO Gold Member

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      Bob, is who I bought mine from
       
    • stage3

      stage3 Well-Known Member

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      I also have the same problem locating pistons other than custom units...6.90 eagle rods????with 383 pistons...I looked at eagles website and did not see a rod like that???

      20160210_163148.jpg
       
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      • stage3

        stage3 Well-Known Member

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        are those forged flat tops?what bore..looked for a PM button here,did not see it..thanks..
         
      • 1962polara

        1962polara Well-Known Member

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        PM=conversations
         
      • stage3

        stage3 Well-Known Member

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        got it...thanks..
         
      • stage3

        stage3 Well-Known Member

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        PM sent thanks..
         
      • PolyJon

        PolyJon Active Member

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        Thought about flat top 383 pistons with a hemi 6.860 rod too.
        Open out the small end to 1.094 from 1.031...:thumbsup:
         
      • fbs63

        fbs63 Well-Known Member

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        Diamond pistons will change bore size on a shelf piston. Just get a 440 piston and change the bore size to what you need.
         
      • Rolling Thunder

        Rolling Thunder Well-Known Member

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        Cleared inbox out. Sorry can’t help right now. Sold these back in 2016 I think.
         
      • PolyJon

        PolyJon Active Member

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        Many thanx for the reply R/T.
        It’s surprising how few stock MW 413 pistons have survived.
        Polyjon
         
      • 33 IMP

        33 IMP Well-Known Member

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        Icon makes a premium piston for a mopar 3.75 stroke, 4.25 (plus whatever oversize) bore, IC689, and IC690. I suspect they are intended for stroker 383, but maybe with rb length rods.....?
        Edit: also a .070 over 426 is a standard bore 440. What is your current bore size? What do you want it to be?
        Edit: looks like the 690 is a dished piston, the 689 is a small dome.
         
        Last edited: Dec 3, 2020
      • Dipstick

        Dipstick Well-Known Member

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        Are you building the engine to race or show? If it's only to show, you might consider a lower compression ratio so you can run unleaded pump gas.
         
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        • coloradodave

          coloradodave FBBO Gold Member FBBO Gold Member

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          FYI, 4 year old thread...
           
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