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1989 454 specs & info

This is a discussion on 1989 454 specs & info within the Technical / Maintenance forums, part of the General Discussion category; I was given a 454 out of an 89 suburban, gonna rebuild it, throw a carb on it and drop ...

  1. #1
    Registered User zapc's Avatar
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    1989 454 specs & info


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    I was given a 454 out of an 89 suburban, gonna rebuild it, throw a carb on it and drop it in my 89 stepside. i know most of you are real negative on these later big blocks (no power) but i gotta assume that with a good set of aftermarket heads,cam,carb,
    & intake that i should get big time torque out of it. the bottom end of these motors should be fine, they were just crippled by bad heads & small cams. is that correct? I cant find any info on these motors . just earlier ones. looking for compression ratio, how many cc heads, when did the roller motors come out, i know on
    late 80's small blocks, most are machined for roller cams,are the big blocks the same? any info, and sites to go to would be a huge help thanx all

  2. #2
    Administrator 454ss's Avatar
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    Re: 1989 454 specs & info

    Chamber configuration:119cc Open chamber
    Compression ratio: 7.9:1
    Intake valve diam.: 2.06
    Exhaust valve diam.: 1.72
    Go to http://www.454ss.com there is a ton of info there.

    click signature for pics
    90 454ss
    92 454ss
    08 Avalanche

    I wish people were like slinkys, fun to play with but when I get bored I can push them down the stairs.

  3. #3
    Registered User zapc's Avatar
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    Re: 1989 454 specs & info

    how different are the ss motors from the regular motors

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    Re: 1989 454 specs & info

    if you rebuild it right i will be better then a vortec

  5. #5
    Administrator 454ss's Avatar
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    Re: 1989 454 specs & info

    Quote Originally Posted by zapc
    how different are the ss motors from the regular motors
    90ss has the same HP, 91-93 had 25 more due to exhaust and intake.

    click signature for pics
    90 454ss
    92 454ss
    08 Avalanche

    I wish people were like slinkys, fun to play with but when I get bored I can push them down the stairs.

  6. #6
    Registered User zapc's Avatar
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    Re: 1989 454 specs & info

    the 454 came out of a 2 wheel drive suburban, going into a 4x4.
    will it have the correct oil pan? also ive been told that the 454 flywheel should have the 700r4 bolt pattern and the turbo 400, is that true.
    this is avery stout heavily worked 700r4. should survive a while with a stock 454.
    Last edited by zapc; 04-21-2009 at 05:03 PM.

 

 

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