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Thread: weight differece sbc vs. bbc

  1. #1
    Junior Member SHOW GUEST
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    Aug 2006
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    weight differece sbc vs. bbc

    Trying to figure out what do you guys think the weight difference between a aluminum block 737bbc with splits to a iron eagle block 434 with two carbs. I hope it is around 200 pounds as the motor is way smaller. What do you guys think

  2. #2
    Senior Member RACING JUNKIE
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    A cast iron BBC block is around 270 lbs or so...just the block. A aluminum head is between 37 and 42 lbs and a cast Iron head is about 70 lbs...not sure about an aluminum block and the internals.

  3. #3
    Member JUNIOR BUILDER
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    Jul 2003
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    I have a bare SBC block and a bare BBC block w/ the center main caps missing in the garage.

    The SBC weighs approx. 155 lbs.

    The BBC Block weighs approx. 200 lbs.

    I've never weighed a complete version of either but I think a 200 lb. difference is realistic.

  4. #4
    Senior Member EXPERT BUILDER
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    atwood,Ky
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    i was always told that there is 150lb differance in a small to big but i'm not sure if thats correct.i hope so cause i'm going big this year. good luck

  5. #5
    Senior Member RACING JUNKIE
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    I swapped from SBC with dart little m to BBC with dart big m. I gained 100lbs exactly. This was actual weight with everything in/on the motors in the car.
    David Lanning
    IHRA NHRA 387B

    Fleenor Racing Transmission
    419-280-1406
    Lanning Electric
    Complete Drag Car Wiring
    APD Race Engines
    www.apdracing.com

  6. #6
    Senior Member EXPERT BUILDER
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    cool hopfully thats all mine will be,but my luck it will gain 300lb,NOT THE DRIVER the car


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