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.

Holley Installation Problems

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by chiefKP, Nov 22, 2000.

  1. chiefKP

    chiefKP Registered Member

    Joined:
    Mar 17, 2000
    Posts:
    16
    Likes Received:
    0
    Location:
    Pyongtaek, Korea
    Hello.

    If you have any experience in installing these puppies I could sure use some
    advice.

    I tried to install my treasure today. Holley claims that it is the proper
    replacement for the OEM carb for my truck...an 84 Blazer with a 5.0 (305)
    V8. I'm mounting the carb on the factory intake manifold. Since I live in
    Korea I am not held to the emission control regulations in the USA.

    Anyway, the carb and the EGR valve get in each others way. Not by much, but
    enough to stop the carb from seating properly. I tried to shave away enough
    casing from the EGR to allow the carb to slip by and I ended up shaving too
    much and ruined the EGR valve.

    So, as long as I'm in the market for a new EGR, are there EGR valves that
    will work in my truck that are smaller than the one in my truck now? Or, is
    there away around the EGR all together?

    I welcome any advice you might have.

    Thanks,

    Scott
     
  2. FLWIV440

    FLWIV440 Registered Member

    Joined:
    Nov 21, 2000
    Posts:
    32
    Likes Received:
    0
    if you want to use an egr valve then get a tomco. It is smaller and should clear(not 100%sure). otherwise block it off. is the holley a spread bore or square bore.?
     
  3. TX Mudder

    TX Mudder 1/2 ton status

    Joined:
    Jul 10, 2000
    Posts:
    2,514
    Likes Received:
    0
    Location:
    Houston
    Dump the EGR. It is not needed, esp. if you don't have to pass emissions.
    -- Mike
     
  4. HarryH3

    HarryH3 1 ton status Author

    Joined:
    May 31, 2000
    Posts:
    10,384
    Likes Received:
    2
    Location:
    Georgetown, TX
    If you get rid of the EGR valve, expect the engine to ping under part throttle loads. That small bit of exhaust gas that the EGR feeds back under those conditions drops the combustion temp by a few hundred degrees. Without it, the high temps can cause pinging. [​IMG]

    <font color=black>HarryH3 - '75 K5</font color=black>
    http://ThunderTruck.ColoradoK5.com
     
  5. TX Mudder

    TX Mudder 1/2 ton status

    Joined:
    Jul 10, 2000
    Posts:
    2,514
    Likes Received:
    0
    Location:
    Houston
    You should reset your timing if you take off the EGR.
    -- Mike
     

Share This Page