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350 Qjet on 454

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 61Scout, Apr 7, 2001.

  1. 61Scout

    61Scout Registered Member

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    Can a quadrajet off a 350 be made to work on a 454? What do I need to change to make it run well?

    Thanks!
     
  2. Blazer79

    Blazer79 1/2 ton status

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    I will soon swap a 454. I'm using an Edelbrock #1902 Quadrajet. It is supposed to work without any mods, just resetting idle mixture and speed. Worst case, I'll have to change primary jets or power valve spring. I might also have to change the secondary rods, but I doubt it.

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  3. thatK30guy

    thatK30guy 1 ton status Premium Member

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    I have the Edelbrock Q-jet #1904 on my 85 K30. It works like a charm. Even though it was a little pricey, it was worth it.
     
  4. dyeager535

    dyeager535 1 ton status Premium Member

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    Yes. Primary metering rods/jets likely will have to be changed, and you can mess with the power piston spring as well. You'll have to know the specs on the 454 before making any kind of "guesses". You can also buy the doug roe book "rochester carburetors" to learn more about them. You can get it from Amazon.com

    You could throw it on the 454 and call it good. If it runs TOO lean you can burn your pistons, but thats an outside shot...usually won't run that lean.

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     

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