High RPM
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500, 472, 425, 368 Discussion, High RPM in Cadillac Engine Technical Discussion; I am considering using a 500 in our modified roadster being built for Bonneville. I need it turn at least ...
  1. #1
    oldracer19 is offline Cadillac Owners Member
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    High RPM

    I am considering using a 500 in our modified roadster being built for Bonneville. I need it turn at least 6500 rpm. I have a line on a '76 engine, and I have also seen a '70 on ebay, but it would be a long drive to pick it up. Any thoughts on whether a '76 would work well, or would the '70 heads be better? Acceleration is not as important as WOT RPM, as we have a couple of miles to get up to speed. Any thoughts?

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  3. #2
    drmenard is offline Cadillac Owners Enthusiast
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    Re: High RPM

    To get that rpm stock heads will fall short... before spending money and time on stock heads check out aftermarket heads... MTS has theres. and Potter automotive has some bigger ones with a big intake to go with them...Both aftermarket heads should get you what you want....Another thing , you were looking at a 1970 - 500 , the 1970 500 has the strongest crank and the casting number ends in 094...

  4. #3
    deVille33 is offline Cadillac Owners Connoisseur
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    Re: High RPM

    Someone had a streamliner on the salt this year and I think they had two 500's under the skin. They broke the record for that class, but I don't know if they backed it up the next day. The run was on UTUBE. If you find this info, you may find out what they used to achieve this run.

  5. #4
    steelybill is offline Cadillac Owners Enthusiast
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    Re: High RPM

    One consideration for high RPM would be the Rods, since those stock Armasteel rods don't like high RPM. 4800 seems to be about the safe limit from what I've learned.

  6. #5
    deVille33 is offline Cadillac Owners Connoisseur
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    Re: High RPM

    Here a link to the Salt streamliner that broke LSR. It wasn't Utube. It was jalopnik.

    http://jalopnik.com/5379917/worlds-f...07-mph-sets-la

  7. #6
    steelybill is offline Cadillac Owners Enthusiast
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    Re: High RPM

    And they did it with one engine!! not two or four like some of the old timers tried, and on gasoline too!!

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