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  1. gokartergo

    gokartergo 3/4 ton status Staff Member Moderator

    Joined:
    Dec 2, 2000
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    Location:
    Hollister, CA
    I finally sold all my Jeep's & moved up to the ranking of a Blazer owner. I picked up a 86 K5. With a cracked head . I went to the local Chevy dealer and picked up a 85 crate motor and switched the flywheel. I only have about 500 miles on it and am averaging around 11.8 MPG. Is that about the best I am going to get out of it. I am running 31in. tires & 3.08 gears with the 700 overdrive tranny.. Thanks

    Gokartergo
     
  2. mich89k5

    mich89k5 Registered Member

    Joined:
    Oct 30, 2000
    Posts:
    40
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    Location:
    Michigan
    That's a little better than what I'm getting, so welcome to the club.

    Mich89k5
     
  3. 90K5

    90K5 1/2 ton status

    Joined:
    Jun 1, 2000
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    Location:
    Lubbock, TX
    Thats about right. I get from 9-11 on mine with FI.

    90K5
     
  4. Chris Demartini

    Chris Demartini 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    2,406
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    Location:
    Dumont NJ 07628
    <font color=blue>I get about 8-9 so 11 isnt bad. Are you still running the stock Q-jet? I went to an Edlebrock 650 two years ago and I got a few more MPG but it went back down when I did the motor last year and then more again when I did the axles and taller tires. The closer to stock it is, the better MPG it will get. Also, fuel injection and overdrive will help. Theres a guy here called 72blazer, he has a TPI 350/NV4500 and he claims 25 MPG [​IMG] !!!! my comuter car doesnt get that much!!!</font color=blue>
     
  5. gokartergo

    gokartergo 3/4 ton status Staff Member Moderator

    Joined:
    Dec 2, 2000
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    Location:
    Hollister, CA
    Yes everything is still stock.. I had to to keep the 3 yr 50,000 mile warranty.... I do like this blazer a lot more them my Jeep


    Gokartergo
     
  6. i_4x4

    i_4x4 1/2 ton status

    Joined:
    Feb 20, 2000
    Posts:
    359
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    Location:
    Brighton, Colorado. USA
    I get 8.2 mpg out of mine, in town or on the hiway. But 4.56's w/ 33's turn some hi rev's about 2900 rpm @ 65 mph. 350/350/208 w/ carb. Later.
    An o/d will help some.

    LET'S ROCK
    Don't follow me you will get STUCK!!
     
  7. Gandolf

    Gandolf 1/2 ton status

    Joined:
    Aug 8, 2000
    Posts:
    764
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    Location:
    SF Bay Area
    11.8 isn't too bad. If you replace your stock air filter element with a K&N air filter element, you will get a small mileage increase. I got a .9 increase (plus a smoother running engine) after installing a K&N in my K5. They cost around $40.

    '89 K5 Silverado 4" lift w/BFG 33's
     
  8. Cmoe

    Cmoe 1/2 ton status

    Joined:
    Feb 19, 2000
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    2,884
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    Location:
    Mesa,AZ
    8 to 10 is my range towing a trailer or not. Sometimes it feels like "FEET PER MILE" though. I changed gears and kept it about stock on the conversion. Next I might go to a fuel injection or throddle body. the carb is on it now.

    C'moe

    <font color=black>the blazer is "Back in Black"
     

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