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questions

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by KENNY, Mar 20, 2001.

  1. KENNY

    KENNY 1/2 ton status

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    I HAVE AN 84 K5. IT HAS A 305. I AM GOING TO CHANGE THE STOCK CARB FOR AN EDELBROCK Q-JET REPLACEMENT. ALSO MSD IGNITION. WHERE SHOULD I PUT THE BOX AND IS THIS A GOOD CARB.
     
  2. muddin4fun

    muddin4fun 3/4 ton status

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    A quadra-jet is often called (affectionatly of course) quadra-junk. I don't like them. I have an older truck though so I can get away with a carter style edlebrock. O-junks just aren't very adjustable.

    [​IMG]


    <A target="_blank" HREF=http://muddin4fun.coloradok5.com>http://muddin4fun.coloradok5.com</A>
     
  3. BlazerGuy

    BlazerGuy 3/4 ton status

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    Q-jets are great off-road, next to fuel injection. I think the MSD box will work fine on the fenderwells.

    Murphy's Laws on Life :
    "Opportunity always knocks at the least opportune time." [​IMG]
     
  4. BadDog

    BadDog SOL Staff Member Super Moderator Author

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    The Q-Jet is the best carb going for off road use. The square bore based on the AFB design will flood out and stall in the rough stuff or with big (even moderate) angles. I tried the AFB once, it runs really great on the road but I returned mine the next day. The Edelbrock Q-Jet is great and it is also very tunable, it is just not as easy as some other styles and you need to know your way around them. Next to fuel injection, you can't beat a Q-Jet.

    On the box, take your pick. I've seen them on the fender well and on the fire wall. Just put it where you have room and it is out of your way.


    Bad Dog

    85 K30 CUCV, 350 TBI, TH400, NP205, D60/C14, 4.56
    Coming soon: 4" lift, 40" tires, massive cutting, shorter wb and rear overhang.
     
  5. bigerik

    bigerik 1/2 ton status

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    I put my MSD 6T box on the top ot the fenderwell--it is fine there. I also love my Q-jet, but you don't want too many cfm for a small block. Research the cfm, and I think you'll find you need 550 cfm max, otherwise the air will move too slowly.
    <A target="_blank" HREF=http://www.bigerik.coloradoK5.com>http://www.bigerik.coloradoK5.com</A>.
     
  6. CaptCrunch

    CaptCrunch 1/2 ton status

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    Just FYI... My MSD box is on the firewall just to the right of the AC and Heater stuff. Was the easiest place to put it because is kinda a pain to mount it on the unever inner fenders

    [​IMG]
    1987 Chevy K5 Blazer- 350 TBI
     
  7. Blazer79

    Blazer79 1/2 ton status

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    My Edelbrock Q-jet is great. I installed mine myself and learned how to tune it using Doug Roe's book on Rochester carburetors. I recommend that book if you get the Q-jet. The only thing not covered in the book is how to get rid of the Quadrabog, which is a very common problem that happens when people don't know how to tune when the secondaries open, but if you run into that (or any) problem, just post over here and we'll be glad to help you.

    <font color=blue>//////
    <A target="_blank" HREF=http://blazer79.coloradok5.com>http://blazer79.coloradok5.com</A>
    </font color=blue>[​IMG]
     
  8. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    QUAD! great carb. Once tuned you just forget it for 5-6 years and enjoy the truck. DON"T get a Hoglly. Terrible offroad. The great thing about a Quad is they adjust for the needed CFM. when the upper plate is adjusted correctly the carb will only give what the engine can handle. You can run a 795 cfm Quad on a 305 then unbolt the carb and stick it on a 454 adjust the idle screws and it will run fine. You do want to pick the last year before the electric mix control. It will support all other emissions but not have the prone to fail mix solonoid.
    Good choice.

    Diging it in the dirt with my K5's
    Grim-Reaper
    <A target="_blank" HREF=http://grimsk5s.coloradok5.com/>http://grimsk5s.coloradok5.com/</A>
     

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