493 street/strip intake help

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  1. PRHeads

    PRHeads Well-Known Member

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    I thought there were some pulls with the 850 on the 440-2.
     
  2. cdr

    cdr Well-Known Member

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    Just asking, my 400-2 low deck came in between standard & max, the 440-2 is MAX as delivered ?
     
  3. Bluefish

    Bluefish Active Member

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    Ron, curious to know if the 337 is available for low deck or just tall?
     
  4. 33 IMP

    33 IMP Well-Known Member

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    337 is not available new anywhere, as far as i know. There's lots of people that want one, now that they can't be found. There were two versions, neither for a low deck. 337 fit standard height ports, and a different part number, also with the cast in valley cover, was for stage 6 raised ports on a 440. I dont remember the part number for that manifold, but unless you have stage sixes, its junk, it fits nothing else. It's wider and taller , and scrap.
    If you find one at a swap meet, or ebey or racing junk , make sure of the part number, i have seen the other one passed off as a 337.
     
  5. 33 IMP

    33 IMP Well-Known Member

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    Sorry, did this badly, see post 44.
     
  6. Bluefish

    Bluefish Active Member

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    Thank you for that.
     
  7. Firefighter3931

    Firefighter3931 Member

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    I can't remember if that test was done.....and I don't have any sheets for that combination. I only have 6 or 7 dyno sheets. The testing was done for 2 days and I missed day 2.....maybe that's when you made that pull ? It would be nice to see the difference though !


    Ron
     
  8. PRHeads

    PRHeads Well-Known Member

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    My recollection is that we tested the 440-2D, then the -2, then the 337.
    Once the 337 was installed it didn’t get taken off.
    That’s how remember it anyway.

    But there’s been a whole bunch of motors and runs made since then..... so I wouldn’t count on my memory as being 100% accurate.

    The 440-2 usually requires a little less work to get it out to the size of an Indy MW gasket than the 400-2 does.
    The 337 is a little smaller at the port exit than the 400-2.

    The 440-2 we used on Ron’s 572 was one of mine that had the port exits opened up to the gasket, along with some minor plenum clean up.

    On a more race oriented 540, the same 440-2, adapter, and 1150 carb made over 800hp.

    I also ran the 337 with the adapter and 1150 on the 540, but only pulled it to 6500........it made a best of 732hp on that pull.

    I think the 337 is a nice piece up to about 725-750hp.
    Much above that and it’s going to require some porting, and even then will likely still come up short to a single plane Indy or Ede SV.

    Had we not had some oil system issues on the dyno with the 572, I def would have been pulling the motor higher.
     
    Last edited: Oct 5, 2019
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    • cdr

      cdr Well-Known Member

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      Thanks Dwayne , my 400-2 took alot to get it to MW & the core shift was awful.
       
    • Firefighter3931

      Firefighter3931 Member

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      • Dan64

        Dan64 Well-Known Member

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        ^^^ Thanks for that.
         
      • hunt2elk

        hunt2elk FBBO Gold Member FBBO Gold Member

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        Curious how you got this setup to fit under an air grabber hood? Cut the throat down on the original air cleaner base, or use a fiberglass aftermarket style?
         
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