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'Cut Q-jet Pics.

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Twiz, Nov 24, 2001.

  1. Twiz

    Twiz 1/2 ton status

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    \'Cut Q-jet Pics.

    All pics http://community.webshots.com/photo/25820953/25821512uUmNJXBRUI

    http://community.webshots.com/photo/25820953/25821982iTgIFANmhT
    This shot shows how the main body and boosters are modified. Notice how the exits of the boosters are knife-edged, and the fuel tranfer/emulsion passege is "tear-dropped". This helps keep the air flowing in the right direction, and takes out much of the turbulance in that area. Also, see how the casting-flash is removed from the secondaries.

    Throttle-shaft and throttle blades:
    http://community.webshots.com/album/25820953HIcqciJClE
    And a pic of my fat thumb (tools used to do the cutting)
    <a target="_blank" href=http://community.webshots.com/photo/25820953/25821250MBuGXzcglG>http://community.webshots.com/photo/25820953/25821250MBuGXzcglG</a>

    <font color=blue>Thanks for the help with linking pics, Wayne!</font color=blue>
    (gawd, I hope this works)

    <font color=blue>Twiz
     
  2. Twiz

    Twiz 1/2 ton status

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    Re: \'Cut Q-jet Pics.

    The goal was to clean up the air-flow, and increase the vaccum signal at the venturi, since a strong signal will allow the carb to accuretly meter fuel flow to changes in airflow (engine-demand). It wil also, break-up the fuel into smaller droplets (atomize better). A atomized fuel will burn faster, more completly, and cleaner. And therefore, make more power, raise MPG, and lower emmisions.

    The work shown in the above, should increase primarie air flow by about 30 CFM, and with no loss in booster signal (it acualy pulls harder from the boosters). Unlike Holleys and Carters, where -most- increases in CFM will loose booster signal in the lower RPM ranges.
    Primairy air flow on a stock Q-jet should be about 187.5 CFM (about 25% of the total 750 CFM)
    This should increase to about 217.5 CFM, not to shabby considering the limited bore of the primaries.

    I'd like to claim this idea as my own, but I swiped it from;
    How To Build Horsepower Vol.2. By David Vizard.

    <font color=blue>Twiz<P ID="edit"><FONT class="small">Edited by Twiztid on 11/24/01 09:33 PM.</FONT></P>
     
  3. solowookie

    solowookie 1/2 ton status

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    Re: \'Cut Q-jet Pics.

    yea I've actually seen that thing, but its been awhile... how much has it changed since then??? (if you get bored you can do that to my TBI)

    <font color=blue> Jeff - may the force be with you</font color=blue>
    <a target="_blank" href=http://coloradok5.com/gallery/Jeffs-Stuff>link to k5's</a>
     
  4. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Re: \'Cut Q-jet Pics.

    Were you able to flow test it to see the improvements?

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
    <a target="_blank" href=http://coloradok5.com/gallery/project_T2> tRusty pics...</a>
     
  5. Twiz

    Twiz 1/2 ton status

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    Re: \'Cut Q-jet Pics.

    It hasn't changed much since the last time you saw it Jeff, but It's about too...I need a carb for the rust bucket beater. So I figured I better get after it.

    <font color=blue>Twiz
     
  6. Twiz

    Twiz 1/2 ton status

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    Re: \'Cut Q-jet Pics.

    The home-made "flow-bench" box works O.K., but the ol' Kennmore just doesn't have what it takes to get enuff "pull" out of the carb. Any ideas?

    <font color=blue>Twiz
     
  7. wayne

    wayne 3/4 ton status

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    Re: \'Cut Q-jet Pics.

    Not a problem on helping you. I was just curious what the deal with the pics was all about and now I know.[​IMG]

    See <a target="_blank" href=http://coloradok5.com/gallery/Waynes-Toy>Project Mighty Mouse</a> here.
    <font color=blue>Wayne<font color=blue>
    <font color=blue>Happy Trails<font color=blue>
     
  8. Twiz

    Twiz 1/2 ton status

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    Re: \'Cut Q-jet Pics.

    Thanks again, Wayne. Man..I was about to throw in the towel.

    Anyone want a good laugh, check out "Twiz pic test 5" in the test forum. I typed out everyone of those friggin' links, I'm beat...and my button pushing fingers is about to go on strike.

    <font color=blue>Twiz
     
  9. wayne

    wayne 3/4 ton status

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    Re: \'Cut Q-jet Pics.

    I hope you now know how to copy and paste because it is so much easier.[​IMG]

    See <a target="_blank" href=http://coloradok5.com/gallery/Waynes-Toy>Project Mighty Mouse</a> here.
    <font color=blue>Wayne<font color=blue>
    <font color=blue>Happy Trails<font color=blue>
     
  10. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Re: \'Cut Q-jet Pics.

    Twiz...welcome to the awesome power of a 'right click'.
    As for your flow box...the only thing that comes to mind that sucks real hard is (wait for it)
    &gt;
    &gt;
    &gt;
    &gt;
    &gt;
    &gt;
    &gt;
    &gt;
    &gt;
    &gt;
    &gt;
    The Avalanche...think you could borrow one?[​IMG]

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
    <a target="_blank" href=http://coloradok5.com/gallery/project_T2> tRusty pics...</a>
     
  11. Jeff427

    Jeff427 1/2 ton status

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    Re: \'Cut Q-jet Pics.

    <blockquote><font class="small">In reply to:</font><hr>

    I'd like to claim this idea as my own, but I swiped it from;
    How To Build Horsepower Vol.2. By David Vizard.

    <hr></blockquote>
    Twiz,
    So this book you are referring to details these modifications specifically for the Quadra-Jet?

    <font color=purple>Jeff427</font color=purple>

    <a target="_blank" href=http://lyonsdesign.bizhosting.com>Lyons Design</a>
     
  12. Twiz

    Twiz 1/2 ton status

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    Re: \'Cut Q-jet Pics.

    Yeah, the book is excelent, it covers mods to intakes, cyl. heads, and carbs (the Q-jet is one of the carbs covered). It's not a rebuliding book, mostly theorys of opperation, testing and modifivcations.

    This carb should be hi-perf, anyone that has questions, now is the time to ask, before this disappears into the great wastland of posts.

    <font color=blue>Twiz
     
  13. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    Re: \'Cut Q-jet Pics.

    That is some NICE work. I have a 79 Carb I was going to drop on old Dollar when I get around to rebuilding it. I think I'll have to go pick up some of those tips and do a little of that to it before I install it.
    I have also done some reading on the gains by cleaning up the casting. Nothing like cheap HP. Let us know how it does.

    Women dig dents and flat paint!
    coloradok5.com/gallery/Grim
    75 Jimmy, Dollar
    Grim-Reaper
     

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