Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Carbs and trannys

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 77K5Blazer, Mar 19, 2001.

  1. 77K5Blazer

    77K5Blazer 1/2 ton status

    Joined:
    Mar 11, 2001
    Posts:
    255
    Likes Received:
    0
    Location:
    Hood River, Oregon
    I need to buy a new carb, as my quadrajet is all worn out. What is the stock size of my carb. I am not sure, but I think that it is 600 cfm? Does anyone know? Also, is my 4-speed manual an SM465? If not, what is it? Thanks!

    1977 Blazer w/ 350 GM crate motor
    44 front/ 12-bolt rear, gear driven NP205
    31x10.50r15 BFG All-terrain- Larger on the way!
     
  2. mudhog

    mudhog THEGAME Staff Member Super Moderator

    Joined:
    Nov 6, 2000
    Posts:
    17,899
    Likes Received:
    2
    Location:
    portland oregon
    yes stock is 600cfm and yes the manual 4 speed is a sm465
    i am running the edelbrock 600cfm on my 77 with a 350 and a sm465 i also have the offroad needle and seat set and i love mine

    s.smith 77blazer lookin 4 mud [​IMG]
     
  3. wayne

    wayne 3/4 ton status

    Joined:
    Feb 1, 2001
    Posts:
    6,178
    Likes Received:
    0
    Location:
    Carlisle, Pa
    I think a Q-Jet was 750 or 795 CFM depending on the year. You can always rebuild the one that you have. It will be a lot cheaper then buying a new one.

    <A target="_blank" HREF=http://jamonline.homestead.com/fromthegroundupK54x4/89Jimmy.html>http://jamonline.homestead.com/fromthegroundupK54x4/89Jimmy.html</A>
    <font color=blue>Happy Trails[​IMG]</font color=blue>
    <font color=blue>Wayne</font color=blue>
     
  4. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,980
    Likes Received:
    189
    Location:
    Roy WA
    They are capable of flowing 750 or 795/800 depending on casting. They were almost always limited mechanically to below that though. 'Most all Chev's, car or truck, 454 or not, got 750's. The '82 and likely other year, trucks got 800's on teh 305 trucks. Bigger is not really better in this case, costs you MPG. Rebuild kit (gasket kit really) is $15-25 for a Quadrajet. Having the primary throttle shaft bushed is $40 locally. Compare that to a new carb. 750 OR 800 Quadrajet has smaller primaries (better MPG) than a square bore 600. Make the call.

    4spd is SM465 as long as there is no external linkage for the shifter.
    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>
     

Share This Page