Biggest smallblock?

Mopar Racers Forum

  1. Longgone

    Longgone John/68 Barracuda & Dart

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    Okay race guys, can you fill me in on some of the various smallblock stroker combos and answer a few questions in regard to them?
    What is the largest displacement engine that can be made with a Mopar smallblock?

    1) stock 340 block
    2) stock 360 block
    3) performance block

    What are the advantages and disadvantages of the various blocks and sizes?
    Can stock heads still be used productively without extensive work?
    What kind of numbers will these combos produce with modest components?

    Thanks for your input.- John
     
  2. crackedback

    crackedback FABO Gold Member FABO Gold Member

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    Got a friend building a 500" SB mopar.
     
  3. res1vw21

    res1vw21 It's only metal

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    I heard with an x block you can do at least 452 but it sounds like you can go bigger.
     
  4. grimreaper

    grimreaper Cross Member

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    I saw an add in some magazine recently for a crate 476 small block.
     
  5. nemesis

    nemesis Well-Known Member

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    Hows he doing that?
    Whats he using :S


    Biggest ive heard or read about was around the 450 mark
    using a mopar block with a deck height of 9 odd inches.
     
  6. Longgone

    Longgone John/68 Barracuda & Dart

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    I recently saw a book advertised for building smallblock strokers and they spoke of a 470 something with an aftermarket block but they gave no more pertinents on the build.
     
  7. rumblefish360

    rumblefish360 So close, yet so far away

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    :toothy10:

    IF you were really serious about getting BIG inchs out of your small block, you could add to the deck height with --for lack of better words but it paints the picture well enuff,--- adding height like a torque plate welded on.

    This extra deck height would allow a MoPar crank to be cut down for use of a Chevy rod adding more stroke. OH and longer rods.

    IF you can add height, the next issue is bore size.

    Bore size has a limit. How far can a race block go before it's too late. Add block filler for stregth so you can bore farther. What is the max?

    NOW! Who has money to throw at this problem? Anybody have an inside to goverment funds? HEY! If they can spend $500 on a hammer back in the 80's..........
     
  8. RogerK

    RogerK Well-Known Member

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    Can't we get some stimulus funds and do some reasearch? You know, for fuel mileage increases with larger displacement engines designed for large transport vehicles code named "A Bodies". :thumblef:
     
  9. nemesis

    nemesis Well-Known Member

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    I could be wrong, was it 9 inch deck height or 9 inch bore.
    I tottaly forgot.
    Il keep my mouth shut til i wake up in the morning an
    know exactly whaat im talking about lol.

    Sleep typing,is a curse :toothy10:
     
  10. crackedback

    crackedback FABO Gold Member FABO Gold Member

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  11. grumpuscreature

    grumpuscreature Resident Curmudgeon

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    Indy is offering a 472 crate small block. 4.2" bore and a 4.25" stroke. The siamese bore blocks will take a 4.2" bore and probably will go to 4.25" but there isn't a head gasket for that bore size. Yet. The Blowtie people are pushing 500 inches with a tall deck aftermarket block that has a 9.6" deck height which is our stock height. Frustrating ain't it?
     
  12. duster340

    duster340 street racer

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    someone on another forum i visit from time to time,has a 501 on the way, but it seams like that is realy pushing it, very few heads can realy suport that in a good way...
    i think a 408 or 416 is realy the max that has a real meaning with stock heads since its hard to make them realy move enough air to turn any rpm...
    i may have got this all backwards but im fairly sure...

    for me i have another solution with twinscrew blower forcing air into just 345cui and it will hopefully make enough power to not need more cubes for a while
     
  13. moparsegura

    moparsegura moparmaster

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    I turned a 318 into a 672 and used stock heads. It made 1075 h.p. and 3000 ft. lbs. torque............O wait, I was dreaming!!
     
  14. darndart

    darndart Well-Known Member

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    A freind of mine runs a 440 SB with W8 heads. 748hp N/A running E98!=P~
     
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