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The best OFF ROAD CARB

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Speed-demon, Oct 3, 2001.

  1. Speed-demon

    Speed-demon Registered Member

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    I'm thinking of getting a 750 cfm quadrajet for my 454
    Holley is too much of a pain in the ass tunning all the time
    Edelbrock, they look pretty thats about it
    Quadrajet have the best idel
     
  2. Pugsley

    Pugsley 1/2 ton status

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    Can't go wrong with hillbilly injection[​IMG] The Q-Jet is the best for the dirt, plain and simple.

    Of the 5 toughest dogs in the neighborhood, my cat's ranked #3
    <a target="_blank" href=http://pugsley.alloffroad.com>pugsley.alloffroad.com</a>
     
  3. dragricinMT

    dragricinMT 1/2 ton status

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    Look into the edelbrock rochester 1904. It's a 795cfm electric choke. I'm running one on my 400 and it works AWESOME!

    78-K5 4"Lift 35"Tires 400SB TH350 NP205
    73 Vega 350SB TH350
     
  4. ChevyCaGal

    ChevyCaGal 3/4 ton status

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    I love my q-jet... [​IMG]

    <a target="_blank" href=http://www.chevycagal.homestead.com/steph.html>Steph's Webpage</a>
    Suck Fumes Ford Boy
    &lt;&gt;&lt; PSALMS 23 &gt;&lt;&gt;
     
  5. 1bad82k5

    1bad82k5 1/2 ton status

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    I am going to yank my edelbrock, and go back to the q-jet. Rochester or the edelbrock variety get my vote.
    eric

    Don't get me started, you know how i get.
    82k5, 14bff, d44, sm465, np205, 300hp350, rust
     
  6. Speed-demon

    Speed-demon Registered Member

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    795 cfm?.......hows the gas treating you?
     
  7. 86blazerk5

    86blazerk5 1/2 ton status

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    Yes, what you want is an Edlebrock 800 (795) cfm quadrajet with the eletric choke. Thats what i have , and it runs great, easy to tune also. And it is actually fine on gas.
    Ike

    Spreading The K5 Gospel!
     
  8. Speed-demon

    Speed-demon Registered Member

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    I was thinking of even changing carbs out for the hiway and then.......WHEN THE CHEWING BEGINS....NEED MORE POWER HA! HA! HA! 750 - 800. I even heard that a old dodge thermoquad works good. Change the linkege out with chevy and you have a toilet flusher! It has small primarys for around town and huge toilet flushing mother #!**!#! ER'S for the off road.
     
  9. dragricinMT

    dragricinMT 1/2 ton status

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    Better than the old 350 and stock q-jet got. I get about 2mpg better with the new motor and carb.

    78-K5 4"Lift 35"Tires 400SB TH350 NP205
    73 Vega 350SB TH350
     
  10. Speed-demon

    Speed-demon Registered Member

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    Is it about the same as the 650 cfm you had on it before?
    for gas
     
  11. BorregoK5

    BorregoK5 1/2 ton status

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    I agree with the Holley swap out, my 850 Puddle Dumper gets way out of wack with a couple thousand feet elevation change and doesn't do well on steep angles. I have the stock Q-Jet but never ran it due to bad experiences at half throttle on my 68 camaro... is it that much better off road? I might throw it back on!

    What, Me Worry?
    <a target="_blank" href=http://www.echobit.com:81/k5/> The 'BEFORE' pictures</a>
     
  12. Speed-demon

    Speed-demon Registered Member

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    did ya ever have to bugger around with the secondary air valve distribution tabs? or just your idle mixture screw?

    OR maybe I should just buy a SPEED DEMON!!! HA! HA! HA! lol
     
  13. reddog64

    reddog64 1/2 ton status

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    I just got a new Holly double pumper 600 cfm and a edelbrock performaer intake...

    We'll see how it goes...
     
  14. 86blazerk5

    86blazerk5 1/2 ton status

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    No, when i installed it, i had my mechanic in the bay next to me telling me what to do. First, i had to set the screw that adjusts your linkage a little to let it idle properly, Then i just adjusted the mixture screws. You turn them until until it no longer changes when you turn it, then you turn it back to the exact spot it stop changing at. It was my first time ever doing anything like that, and with him telling me what to do, it was easy.
    Ike

    Spreading The K5 Gospel!
     
  15. SCOOBYDANNN

    SCOOBYDANNN 1/2 ton status

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    The q-jets have small primaries so when on the street just driving normal the gas is pretty good, but when you open them up the secondaries are Huge

    Sun Desert Offroad <a target="_blank" href=http://4x4.alloffroad.com>4x4.alloffroad.com</a>
     
  16. dyeager535

    dyeager535 1 ton status Premium Member

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  17. beater74

    beater74 1/2 ton status

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    i thought i read some time ago in four wheeler that some company sold modified carbs for off-road purposes, has anybody seen anything like that
     
  18. 84_Chevy_K10

    84_Chevy_K10 Banned

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    All Q-Jets are 750 or 800 CFM, but the design of them makes htem work on anything from a 6 cylinder to a 454.

    I have an Edelbrock squarebore 500 CFM model that works wonderfully, but I think I can get better mileage with a Q-Jet, so I'm going to build myself one with Doug Roe's book, Rochester Carburators, and go at it this winter.

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     
  19. not4show

    not4show 1/2 ton status

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    Hey, would that carb, the Edlebrock 800 (795), work good on a basicly stock 350? I have a Q-jet on it now, and I'm not very pleased.

    Never put a stupid move passed a stupid person.
     
  20. 84_Chevy_K10

    84_Chevy_K10 Banned

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    It's the same carb. Rebuild yours correctly and you'd have the same result.

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     

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