Big big block Caddy

Discussion in 'Big Block Cadillacs' started by Cad Man, Nov 8, 2018.

  1. Cad Man

    Cad Man Member

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    Now that we actually have semi affordable forged 4340 cranksahfts to pick from possible Big Caddy cubes some may not know are possible..

    With no fill we have 4.360 bore. Or 4.420 bore.. Possibly 4.440 bore with no or only partial fill....Or. Full fill
    4.500


    4.360 x 4.600 = 549
    4.42 x 4.600 = 565
    4.440 x 4.600 = 570
    4.500 x 4.600 = 585

    4.360 x 4.750 = 567
    4.420 x 4.750 = 583
    4.440 x 4.750 = 588
    4.500 x 4.750 = 604 cu in Mad Cadder Caddy..

    These are now off the shelf items..
    The big crank pretty much drops right into the block . Cadco offers a optional custom crankshaft . it is possible there may be even larger strokes in the future
     
    Last edited: Nov 8, 2018
    PJ McCoy likes this.
  2. bugzaper

    bugzaper Well-Known Member

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    :thumbup:....crazy big numbers!
    (now...what kind of prices are we talking about)
     
  3. Cad Man

    Cad Man Member

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    Thats hard for me to answer because I've known him for so long I get things discounted.

    As for a retail price...Let's put it this way
    it's less than in 1992 when I went to Moldex cranks which was about 1 mile from my old house they wanted $3400 and had no idea what kind of stroke could fit.. not to mention the improvements in crank design since then

    That's the 4.750 stroke the 4.600 is a few hundred less..

    And before you gasp think about how it's getting hard to find a 500 crank. When you do it is getting more and more pricey and then you have no idea what kind of stupid shit the previous owner did to and with it.. then getting it ground and prepped.. or offset ground which has ended in disaster more often then not with incompetent machine hacks.. and then you still have a 50 year old plus piece. I was drooling at the chance when he gave me the price..

    Btw
    It has 2.200 rod journals and I'll go with 7.1 rods if I get it.. that makes for a short light piston too.. 1.330 comp height I believe
     
    Last edited: Nov 8, 2018
  4. Cad Man

    Cad Man Member

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    And one more thing maybe most importantly of all a crankshaft like this will be practically indestructible it will be the last crank you'll ever need to buy in a 500 even if it gets damaged it can be repaired in the stronger more rigid crankshaft will also add to the strength of the block
     
  5. Red98422

    Red98422 Active Member

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    It’s posts like this that tend to give me bad ideas...:sneaky::devil:

    That being said I can personally attest to the fact that cad cranks are really hard to find, at least in my area. I was fortunate enough that Shakedog was liquidating and had one that he sold me (it was still a 6hr one way drive)
     
  6. Cadillac Kid 1

    Cadillac Kid 1 Active Member

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    yes,
    I just bought a couple of motors for the cranks. Just what everyone needs, more Cadillac motors. Right Marty?
    Greg Surfas
     
  7. 48Austin

    48Austin Active Member

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    Still haven't given an answer on or about price.:cautious: Where are the forgings or billits made:cautious:?
     
  8. 48Austin

    48Austin Active Member

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    What vehicle(s) do you drive?:
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    What about alloy rods?
     
  9. Cad Man

    Cad Man Member

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    I came as close to it as I honestly can...

    I gave a general idea of cost because I dont know how much he sells to others for.. I get special pricing because I've been a customer since 1990.. and have bought lots of stuff

    The cranks use chebby rods so you can use whatever rod you like.. I going with 7.1 rods but he carrys 3 different lengths.

    pistons are per order because everyone wants different compression bore size and different heads ..

    Obviously he went thru alot of bullsheet no one else has done or is gonna do to get the cranks made and on his shelf .. So the source is perpritory. But its USA
    It's not a zillion part order so no chinese manufacturer would touch it
     
    Last edited: Nov 13, 2018
  10. 48Austin

    48Austin Active Member

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    What vehicle(s) do you drive?:
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    Will the longer alloy rods clear the block, or will the lower bores need to be clearance ground? You know that alloy rods are physically bigger.
     
  11. Cad Man

    Cad Man Member

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    Yes they clear with no machine work ..

    How about this. 30 years ago Larry K told me about a guy that siamese sleeved a Caddy block to take advantage of the 5" bore spacing and made a 590 inch Caddy.

    Just found out who that guy was. Courtney Hines. And he may just do another ..

    4.625 x 4.750 = 638.4 cu in of Cadillac

    Now that's a big Caddy

    Oh I almost forgot..
    There are 12 forged 4.600 cranks..he only has 1 left right now..

    There are 5 forged 4.750 cranks .. he has 4 of them and I have 1. Hehehehehehehehe
     
    Last edited: Nov 20, 2018 at 11:32 AM

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