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500 caddy info post (please help out the cause and add to)

Discussion in 'The Garage' started by big_truxx, Jul 1, 2005.

  1. big_truxx

    big_truxx 1/2 ton status

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    what's the bore and stroke on the 500?

    dd2000 does not have cadillac in there lol but I am assuming that using a "454" and putting in the correct bore and stroke there would be no diff anyways :D

    looking to get a general caddy 500 info post going here so it will be easier for people to locate info.

    thanks
     
  2. Mad-Dog

    Mad-Dog 1/2 ton status

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    500 CID
    4.300" bore
    4.304" stroke
    6.750" rods
    1.900" compression height
    10.810" deck height (measured from crank centerline)
    1.57:1 rod ratio (short rod stroker)
     
  3. big_truxx

    big_truxx 1/2 ton status

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    what was their compression ratio from the factory?
     
  4. big_truxx

    big_truxx 1/2 ton status

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    also some links to 500 caddy sites would be imensely cool here :D Like for parts and whatnot
     
  5. Mad-Dog

    Mad-Dog 1/2 ton status

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  6. Mad-Dog

    Mad-Dog 1/2 ton status

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    i dunno...probably around 8.5:1
     
  7. grimjaw

    grimjaw 1/2 ton status

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    depends on the year. You can build up to 13:1 using 472 heads as I remember. That could make a monster Propane engine.
     
  8. big_truxx

    big_truxx 1/2 ton status

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    am thinking about a gasser for a hotrod project. and also to see what #'s a stocker would produce :D
     
  9. Ned Kelly

    Ned Kelly 1/2 ton status Premium Member

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    They say the stock 472/500 cams were very poorly designed due to the emissions requirements of the early 70's. Most important thing to do is get a modern cam like an MT3 or MT5 for much better performance.

    I got an MT10 into my 500 but haven't installed the motor yet. I'll post how I find it (compared to a stock motor, but I drove it while it was still in the car, nevertheless, it will be some comparision) when I put the motor in.
     
  10. moturbopar

    moturbopar 1/2 ton status

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    The mt10 is a sweet cam! I really wouldnt recommend anything smaller. I built a76 500 stock short block with 120,000 miles with pocket ported 120cc heads (not best for flow) stock valves, performer intake, mt10 cam and kit and sanderson headers 750 edelbrock carb. The engine went into a 76 ford f-250 crew cab. The truck was very quick for its size and with the 700r4 got pretty good fuel economy. Anyways the mt10 was the best all around cam that I have seen, it made power all the way to my 4800rpm redline and made so much low end torque you could smoke the tires with anything over 1/4 throttle it idled with 18in/vac at around 650rpm! By the way the truck ran regularly into the low 14s!!!!
     
  11. big_truxx

    big_truxx 1/2 ton status

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    I do not know much about the 500's (duh I started this post :D) lol so cams are one thing I will look into for sure. My philosophy is that if I am rebuilding a whole motor it is so much easier just to put all the good parts in from the start rather than wish I did later on ;)
     
  12. Ned Kelly

    Ned Kelly 1/2 ton status Premium Member

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    Moturbopar,

    Thanks for the positive info on the MT10 cam. I was wondering if I should have gone with the MT5, but from what you've said I now feel the MT10 was a good choice. :D

    What kind of gears and tires did you run? Rpm's at highway speeds? How well did the 700r4 hold out with you truck?
    THanks
     
  13. ksblaze83

    ksblaze83 1/2 ton status

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    http://users.elknet.net/mts/index.html
    I think 500cid.com is suppose to be a pretty good site too!

    I had a 472 in my old blazer. It had 350/205 behind it and would spin the 38.5 tsl radials (14bff 4.10's gov-lock) pretty easy.
    It was fun to drive!
     
  14. moturbopar

    moturbopar 1/2 ton status

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    Hi the truck ran 3.73 gears with 32"tall tires I dont remember what the rpm was at 75. The 700r4 was a well built raptor series and was way too much money for the extra 1.5 mpg
     
  15. K10ANDYKHAMNIC

    K10ANDYKHAMNIC 1/2 ton status

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    i have a 78 500 with a 400 behind it sitting in my boneyard of stuff to do something with someday . :confused:
     
  16. big_truxx

    big_truxx 1/2 ton status

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    to sell to me :D :waytogo:
     
  17. resurrected_jimmy

    resurrected_jimmy 1/2 ton status

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    here's a link that might help www.500cid.com, they had a crate motor that put out 450 hp and over 600 lb ft torque for around $3500
     
  18. smalltruckbigcid

    smalltruckbigcid 1/2 ton status

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