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Thread: LS1 cast iron or Alum.

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  1. 04-24-2009 10:51 AM #1
    mean05
    mean05 is offline Slow
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    Quote Originally Posted by r.barn View Post
    Iron blocks came in the truck and SUV's and weigh about 70lbs more
    than alum. blocks.

    Iron is stronger and cheaper to find
    70lbs weight savings isnt gonna mean much to you in a 4,000lbs truck

    Aluminum will take just as much as the cast and the weight is about 140lbs difference...that's why i went with an LS2 block
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  2. 04-24-2009 01:01 PM #2
    r.barn
    r.barn is offline Senior Member
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    Quote Originally Posted by mean05 View Post
    Aluminum will take just as much as the cast and the weight is about 140lbs difference...that's why i went with an LS2 block
    Anyone got a link to weight difference on iron vs. aluminum.

    I've seen everything from 65-140 lbs difference
    Anyone have a reliable source for what it is ..... for sure ?
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