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Anyone with a 383 Look here

Discussion in 'The Garage' started by Redfrog, Jun 1, 2002.

  1. Redfrog

    Redfrog 1/2 ton status

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    What kinda of Gas milage are you getting,what gears,and what's your tire size. I am thinking of building one for a daily driver and am wondering what kinda of milage they get.

    Thanks in advance
     
  2. Highliner

    Highliner Registered Member

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    About 14mpg avg. if you keep your foot outta' it running 4.10 gears and 35s.
     
  3. 4x4k20

    4x4k20 1/2 ton status

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    i built one for my k20 it has 3;73 gears with 35s it gets 9 mpg thats running prem. if you build one keep the compression down
     
  4. TX Mudder

    TX Mudder 1/2 ton status

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    WHat compression ratio are you running? (to keep it down?) Just curious.
    -- Mike
     
  5. CHEVY 4WD

    CHEVY 4WD 1/2 ton status

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    Will a 383 Have alot more HP and or TQ?
    Also I have heard a little about a 400 and a 415 stroker are these any good? Im trying to figure out the best small block
     
  6. Redfrog

    Redfrog 1/2 ton status

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    What compression are you running... I am going to try to keep it below 10-1 or so....
     
  7. DesertDueler

    DesertDueler 1/2 ton status

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    Go 8.5-9.0 to 1 so you can run cheap gas. Anything higher and you have to run prem.

    Dan
     
  8. Redfrog

    Redfrog 1/2 ton status

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  9. 4x4k20

    4x4k20 1/2 ton status

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    mine is 10 to 1i have the vortec heads
     
  10. Erich_in_AZ

    Erich_in_AZ 1/2 ton status

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    That's the same setup I had in my old 67 GMC pickup. Ran bad on cheap gas with any kind of load, or running the A/C. With premium, it had some kick to it. My mileage was about 10-12mpg with 3.73's and a 700r4, but I had a hard time being last across the light in it. /forums/images/icons/smile.gif I would try to keep the CR to 9:1 if I did it again.
     
  11. moneypit

    moneypit 1/2 ton status

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    8-9 depending on my foot!
     
  12. muddin4fun

    muddin4fun 3/4 ton status

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    Location:
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    about 15 on the highway. I've got 4.56's, 36" swampers and a TH350. I'm running 9.75:1 compression and have to use 93 octane, but it's worth it. Lots of down low torque and the hp is right there when I'm on the highway. I've got 375hp and 450 ft lbs. I don't think I'd ever run a plain jane 350 after owning a 383.
     
  13. TopOff

    TopOff 1/2 ton status

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    383 mostly stock heads, RV (very close to the Edelbrock performer cam, just not as much lift) type cam. Auto tranny... with the Edelbrock carb and Unilite ignition I was getting ~15-16 mpg. With my HEI, and TBI now I am getting ~14 MPG.

    35s with 3.73s
    I am running ~9.5 :1 compression ratio, and I HAVE to run 91 octane... /forums/images/icons/frown.gif
     
  14. Redfrog

    Redfrog 1/2 ton status

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    Thanks for the replys, I think I'm going to bite the bullet and do
    it.. If I ever get my block back from the shop /forums/images/icons/smile.gif
     

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