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What is the weight difference between a 350 n 454?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 4GUNZ4X4Z, Apr 1, 2001.

  1. 4GUNZ4X4Z

    4GUNZ4X4Z 1/2 ton status

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    I was thinking about this the other day and I really dont have any idea. I'm leaning more towards taking off weight on my K5, rather than adding it, but I have kicked the idea around of installing a 454. Does anyone know what the weight difference is between the 454 n 350 assuming they are stock.

    <font color=blue>Professional <font color=red>JEEP EATER</font color=red> it's a population control thing.</font color=blue>[​IMG]
     
  2. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    Probably a 250 to 300 lb. difference, obviously in favor of the 454. I am installing a 454 in my Blazer. I bought it minus drive train, and the 454 just sounded like too much fun!

    <font color=red> Check out my rig @ </font color=red>
    <A target="_blank" HREF=http://24.10.209.54/bigolk5.htm>http://24.10.209.54/bigolk5.htm</A> [​IMG]
    <font color=red> I Love My Blazer! </font color=red>
     
  3. Cavalry

    Cavalry 1/2 ton status

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    small chev 575lb
    big chev 685lb

    Luke
    84 K5
    [​IMG]
     
  4. '73 K5

    '73 K5 1/2 ton status

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    I had always heard that a small block is around 500 and a big block is around 700. So 200 pounds difference.

    '73 K5
    Chevy good...Ford bad
     
  5. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    I think Cavalry is right on the mark. Somone said with an aluminum intake and headers the big block comes in real close to a small block with a cast iron intake and manifolds...[​IMG]
    I seem to remember this question has come up before and somone had a link to a site with the weights for most engines out there, of course I can't remember the link...[​IMG]

    Rene

    [​IMG]<A target="_blank" HREF=http://jules.coloradok5.com>http://jules.coloradok5.com</A>
     
  6. wayne

    wayne 3/4 ton status

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    I agree with Rene. If weight is the concern you can get a bigblock to weigh in a a small block weight. Aluminum intake, heads, waterpump, and a set of headers should do the trick.

    <A target="_blank" HREF=http://jamonline.homestead.com/fromthegroundupK54x4/89Jimmy.html>http://jamonline.homestead.com/fromthegroundupK54x4/89Jimmy.html</A>
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    <font color=blue>Wayne</font color=blue>
     
  7. POWERMAD

    POWERMAD 1/2 ton status

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    Hey all
    I went diggin through the stack and found the AUG 98 HOTROD.
    They did a shoot-out between a 408 SM and 408 BB.
    Both plants had cast iron heads and aluminum intakes.
    The SM weighed in at 470lbs. The BB 610lbs
    see ya

    my truck's not dirty, it's earth tone paint
     
  8. chevy4x4

    chevy4x4 1/2 ton status

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    <font color=green>small block 350: 550lbs
    big block 454: 625lbs

    This is from the october 2000 issue of Fourwheeler. If you want any other engine weights, or dimensions, check out the oct 2000 issue or ask me.</font color=green>

    [​IMG]
     
  9. bablazer73

    bablazer73 1/2 ton status

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    for the little weight difference, I would do a big block. I am building a 454 for my blazer. brute torque rules!

    your right. I don't understand the jeep thing!
     
  10. 454Blazer

    454Blazer Registered Member

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    We swapped in a 454 and I'll tell you what, it frickin flys...I have a 14 bolt with the stock 4.10's and 39's so it feels like it's taking off in second gear, but it still goes like a bat outta, well you get the picture. Can't wait to see what 4.88's or 5.13's will be like.

    http://members.home.net/snarrlman/index.html
     
  11. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Alot of these responses sounds around the right ballpark range. But again, like some others have said, it all depends on what brackets and accessories are on the motor. Some people have weighed their motors COMPLETE, with everything including the A/C compressor. This adds that extra "unneccessary" weight. I have heard on an average, the weight difference between the two is around 125 lbs.
     

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