connecting rods
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500, 472, 425, 368 Discussion, connecting rods in Cadillac Engine Technical Discussion; I'm thinking about going with the 10:1 compression pistons from cad company for the 500 im building. for thoes of ...
  1. #1
    pdoke2003 is offline Cadillac Owners Member
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    connecting rods

    I'm thinking about going with the 10:1 compression pistons from cad company for the 500 im building. for thoes of you who have built these engines would you trust the stock rods at this compression or do I need to buy forged?

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    eldorado99's Avatar
    eldorado99 is offline Cadillac Owners Connoisseur
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    Re: connecting rods

    Well my 472 is 10.25:1 and its stock (1970). I'm almost positive your stock rods are fine.

  4. #3
    davesdeville's Avatar
    davesdeville is offline Banned
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    Re: connecting rods

    I'd definitely trust the stock rods just fine at 10:1 if the rest of the motor is stock.

  5. #4
    pdoke2003 is offline Cadillac Owners Member
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    Re: connecting rods

    thanks guys, but I just bought the "500" off the guy and got it home and checked the numbers turns out it's a 1970 472. I know I should have checked the numbers first but I couldn't pass it up for $140. anyway is the crank the only thing I would have to swap to make it a 500? i know the difference in performance between the two is negligable, but there's something about being able to say I'm running a 500cid caddy in my jeep. thanks for your help.

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    1969cadillaceldorado's Avatar
    1969cadillaceldorado is offline Cadillac Owners Fanatic
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    Re: connecting rods

    Quote Originally Posted by pdoke2003 View Post
    thanks guys, but I just bought the "500" off the guy and got it home and checked the numbers turns out it's a 1970 472. I know I should have checked the numbers first but I couldn't pass it up for $140. anyway is the crank the only thing I would have to swap to make it a 500? i know the difference in performance between the two is negligable, but there's something about being able to say I'm running a 500cid caddy in my jeep. thanks for your help.
    i like the 472 better then the 500 and the 472 has 10.5 compression.i think all u have to do is change the crank to a 500 crank then u will have a 500 but im not really sure.

  7. #6
    Nick Campagna is offline Cadillac Owners Member
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    Re: connecting rods

    If you change the crank, you must change the rods, OR pistons to maintain the same compression height. Check out EGGE.COM for original cast 1970 500 pistons.

  8. #7
    pdoke2003 is offline Cadillac Owners Member
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    Re: connecting rods

    thanks, I actually just found that out today searching around this site. now I just need to find a cheap good crank. the junk yards around here are useless and the best price I've found so far is $200 from MTS(500cid.com) but I'm not looking forward to shipping from california. That EGGE site is great, I had never seen that before, and I'll probably buy pistons from them but they don't see cranks. So if anyone out there has a 500 crank they want to get rid of or wants to buy a 472 crank for $200 let me know. I live in michigan.

  9. #8
    davesdeville's Avatar
    davesdeville is offline Banned
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    Re: connecting rods

    For the price Egge wants for cast pistons I'd just go for KBs..

  10. #9
    pdoke2003 is offline Cadillac Owners Member
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    Re: connecting rods

    the only problem with that is KB doesn't make 10:1 pistons for a 500 with 76cc heads. then I'm back to 12.5:1 compression and I have to worry about racing gas and possible connecting rod breakage.

  11. #10
    pdoke2003 is offline Cadillac Owners Member
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    Re: connecting rods

    nevermind I just found them from cad company for 395.

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