1. Ww58_bandit

    Ww58_bandit Well-Known Member

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    Currently building a 493 stroked 440 and estimate will put out between 650-750bhp.

    I'm running a complete standard 727 currently with a csr shield. Will have a fti torque converter with 3800 stall rate with 440 source sfi flex plate. Car will be street strip use.

    I'm wounding what power a 727 can handle. Guessing will need modifying to handle power and if so what parts will needed. Want to keep an auto option valve bodie thow so can keep auto function for street us. Can you get a manual/auto reverse valve bodie?

    Many thanks
     
  2. Lefty71

    Lefty71 Well-Known Member

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    There are shops ( Cope and A&A ) making 700hp plus 727's that include special input and output shafts, can easily go $7k plus. If you have a high dollar motor, there's no sense in trying to go low budget on the rest of the drivetrain! Doubt you can use/abuse the trans with that 700 horse when on the street anyway realistically, but you'll need the safety/security of a proper built trans when on the launch pad!
     
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    • Syleng1

      Syleng1 Karma is real and Life is short... FABO Gold Member

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      Personally I’ve seen up-to 1000hp run thru a 727. Heavily modified of course.
      With a good trans shop and proper parts I’d be safe at 750hp all day long.
      Since the days of my youth and with today’s technology I would not quote you any parts outside information written by Chrysler in the old DCC engine and Chasis books. Get a copy of those and start there. They are a wealth of excellent proven information to start with.
      syleng1
       
    • famous bob

      famous bob mopar misfit FABO Gold Member

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      ABOUT THE SAME HERE , A QUALITY REBUILD W/ GOOD PARTS AND A LOW BAND APPLY WILL DO IT ---------NO LOW GEAR BURN-OUTS !.
       
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      • Ww58_bandit

        Ww58_bandit Well-Known Member

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        What parts are needed I have limited knowledge on auto box's and 0 on 727s
         
      • bcschief

        bcschief Well-Known Member

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        A former coworker told me when AMC was looking for an automatic to put behind the 401 they went with the 727 because it was the only transmission at the time that could take a full throttle down shift behind the 401.
         
      • 383Scampman

        383Scampman Well-Known Member

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        TSR racing or A&A transmissions have the parts you need . Do not cheap out here . Good luck
         
      • CudaFactHackJob

        CudaFactHackJob FABO Gold Member FABO Gold Member

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        The 426 hemi was actual around 600 hp, and they didn't have red eagle clutches and kevlar bands back then. Not to mention that narrow direct drum bushing and journal they were running at the time. Now there are even seven plate red eagle direct clutch packs for around a hundred bucks, and similar forward packs available. I wouldn't get too carried away with those low (for a 727) power levels.
         
      • Syleng1

        Syleng1 Karma is real and Life is short... FABO Gold Member

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        Just to add to the “mystical” Hemi lore. Those hemi’s came with very little warranty if any.... kinda tells you Chrysler knew what they were doing putting a 727 behind those engines.
         
      • CudaFactHackJob

        CudaFactHackJob FABO Gold Member FABO Gold Member

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        The hemi came with a modified 727. A five plate direct for one. At 71 years old, I was around when the 727 equipped hemis were tearing up the tracks. I never heard any complaints. Did you?
        Warranty.."if any"? There was 'zero' warranty on any street racers from any manufacturer, starting back with the 413 cross ram to the Ford Thunderbolt, etc.
         
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        • Lefty71

          Lefty71 Well-Known Member

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          If you want to read about the unit you are gonna build first (very smart), pick up the 727 books put out by Carl Monroe or Tom Hand, or both. Very, very informative and inexpensive first start, IMO.
           
        • transman

          transman Well-Known Member

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          Sure there was: the "TAIL LIGHT WARRNTY":icon_fU:
           
        • CudaFactHackJob

          CudaFactHackJob FABO Gold Member FABO Gold Member

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          I stand corrected...I shall now sit down..
           
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