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Gas Mileage

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 85Jimmy, Feb 10, 2002.

  1. 85Jimmy

    85Jimmy Registered Member

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    What kind of gas mileage is good for an 85 jimmy with 104000miles 305, 700r4, 4.11s, carter 625, and hooker headers and a hooker dual 2 1/4 kit?
     
  2. Hossbaby50

    Hossbaby50 3/4 ton status

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    I got 10MPG with my 305 and Qjet, 3.73's, 32's, and 100K. With my new 350 I actually got a little better mileage then I did with my 305.

    My Chevy isn't broken, its just out of gas.
     
  3. rockink5

    rockink5 1/2 ton status

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    my 85 K5 gets about 15-18MPG don't ask me why.
    Q-JET 3.73's and 32's
     
  4. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color=blue>My stock 89 with a TBI 350, K&amp;N, 700R4, 31s and air damn got 12.5 when I checked. I think I need to swap out my leaking exhaust for a Flowmaster cat-back and do a tune up (shakes at a stoplight)
     
  5. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    Mine gets about 18 on the highway as well, but that's because I'm really easy on the pedal. I found that drving 10 mph slower on the highway increased my mileage by like 30%.

    I have 31s, 3.73s, a 700r4 and a 305 with 147k miles.......

    I forgot to mention that I run dual exhaust with no cats. All my smog crap is removed as well because up here we don't have emmision laws. I'm sure that makes a big difference!!!



    <font color=red>DIGGING AND DIGGING AND DIGGING</font color=red><P ID="edit"><FONT class="small">Edited by CanmoreK5 on 02/10/02 10:33 PM.</FONT></P>
     
  6. txbluethunder

    txbluethunder 1/2 ton status

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    im getting around 15 on the highway with a stock tired 305/700R4 and 3.08's in the rear on 31's.

    1986 K5 Blazer
    Stock and changing soon!
     
  7. fortcollinsram

    fortcollinsram 1/2 ton status

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    I am getting about 11.5 and that is with 35's, a 4" lift, 3.73gears and a mix between heavy and light throttle application [​IMG] I could probably pull off 13-14 on the highway if i slowed down a bit..i always go like 80 all the way home....

    Chris

    Was that a speed bump? No, just a Rice Rocket </font color=red> <a target="_blank" href=http://coloradok5.com/gallery/fortcollinsram>My 87 Blazer</a>
     
  8. 85Jimmy

    85Jimmy Registered Member

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    I just averaged about 12mpg on the highway driving over th Rockies an a 460mile trip driving 70-75mph half of it going into a 40-60 mph wind the other half with the wind pushing me. ps I don't have any of the smog stuff got rid of that when I put the carter on. I also only have the 29" 235x75-15s Chris
     
  9. shawnboy

    shawnboy 1/2 ton status

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    Toronto, Canada, eh.
    I average 15mpg with 3.73s, 33s, dual cat back, FI 350 with MSD and a 165' stat. Just normal everyday driving with the odd bit of craziness thrown in for good measure.
    Shawnboy.

    <font color=red>If you are having too much fun it's probably illegal.</font color=red>
     
  10. blazen_md

    blazen_md 1/2 ton status

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    I don't mean o be ignorant or nothin but @#$% gas mileage. U gotta pay to play.

    90k5 35" ssr radials 6in superlift 4.10's locked in the rear.
     
  11. Nonesuch

    Nonesuch 1/2 ton status

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    went from a Q-jet carbed 350 with a th350 and 2.73's on 32's getting 7-8 (needed a tune up bad) to TPI fuel injected 350 getting about 14-15 (approxiamte, i have only put 240 miles on it)

    Austin, Texas K5'er
     
  12. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    Keep in mind that some of us use our Blazers as daily drivers year round..........5 MPG sure adds up to a lot of money at the end of the year.



    <font color=red>DIGGING AND DIGGING AND DIGGING</font color=red>
     
  13. hammer

    hammer 1/2 ton status

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    I'm at 8 after a tune up and it's a daily driver all winter long

    <font color=red>Let me at it I can break it</font color=red>
     
  14. hammer

    hammer 1/2 ton status

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    I'm at 8 after a tune up and it's a daily driver all winter long

    <font color=red>Let me at it I can break it</font color=red>
     
  15. 85Jimmy

    85Jimmy Registered Member

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    I just rebuilt the q-jet and took of the carter it felt like I lost some power but I took the same trip and averaged a sweet 15mpg Chris
     

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