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.

Gallons Per Mile, Post up or die!

Discussion in 'The Garage' started by hawkeye649, Oct 13, 2004.

  1. hawkeye649

    hawkeye649 1/2 ton status

    Joined:
    Mar 26, 2004
    Posts:
    848
    Likes Received:
    0
    Location:
    New Hamp-shi-ah
    Okay, here's the rules:
    Please post the specs on your rig in non-enigma code. I am getting better at reading the cryptic signatures, but I'm not 100%. Even better, just copy the format that I'm using to list my specifications /forums/images/graemlins/thumb.gif
    Anything that you think wll effect gas millage, please list. IE, ejector seats probably wont, but non-stock timing might.

    Because I'm lazy and closed minded, please no metric readings /forums/images/graemlins/whistling.gif

    1990 GMC F/S Jimmy /forums/images/graemlins/k5.gif
    350CUI TBI
    6* BTDC
    Lager-than-stock Air Filter
    Run 89 o-tang (the fruity drink w/ a kick) always.
    130,000K
    TH700R4
    20K-30K old rebuild.
    NP241
    No rebuild as far as I know
    Front and rear 10b
    3.73, open carriers.
    31x10x16 generic "all terain" tires. Really flat, really square, I.E. for the road.


    16MPG mixed backroads and highway with front hubs locked, in 2HI.


    Why do I ask? I'm trying to weigh all pros and cons of what lift situations I am thinking of....
     
  2. Sidepipes

    Sidepipes 1/2 ton status

    Joined:
    Nov 9, 2002
    Posts:
    139
    Likes Received:
    0
    Location:
    St. Thomas, Ontario, Canada
    14MPG

    Stock drivetrain( engine 150K KM's, rebuilt tranny and 10B with 3.42's)
    33" BFG AT's
    When I bought it it was pulling 8MPG with the Puny 235/75r15's and no convertor lockup..... lots of tuning and maintenance have gotten her up to 14MPG
     
  3. big83chevy4x4

    big83chevy4x4 3/4 ton status

    Joined:
    Mar 22, 2002
    Posts:
    6,587
    Likes Received:
    0
    Location:
    Sheridan, Michigan
    1983 chevy k20
    350CUI g jet carb
    6* BTDC
    open element air filter
    Run 87 o-tang
    130k on truck
    TH700R4 in drive
    9k on rebuilt motor
    NP208
    4" suspention lift
    Front 10b and rear 14bsf
    3.42, gov loc rear open front
    35x12.5x15 cooper SST front, dunlop mud rover rear


    10MPG highway loaded or unoaded with speedo off (milage off also)
     
  4. rubbinz raczn

    rubbinz raczn 1/2 ton status

    Joined:
    Oct 4, 2004
    Posts:
    656
    Likes Received:
    0
    Location:
    too far north!
    1967 gmc lwb 1990- 454 stock rebuild -edelbrock 750 carb-holley street dominator intake- edelbrock performer cam-msd dist 7" suspension lift th400-np208-3/4 ton axles 4:10 gears 35/12.5/16.5 bfg's 5-6 mpg but all 4 tires smoke!!! /forums/images/graemlins/histerical.gif /forums/images/graemlins/histerical.gif /forums/images/graemlins/histerical.gif
     
  5. BadDog

    BadDog SOL Staff Member Super Moderator Author

    Joined:
    Feb 24, 2001
    Posts:
    7,777
    Likes Received:
    11
    Location:
    Phoenix, AZ
    18+ mpg typical highway.

    Approx 450 hp & 750 ft/lbs
    Sub 15 second 1/4 mile times.
    33" Dueler ATs with no lift.
    7500 lbs curb weight.
    13-15 mpg Loaded to GVW of approx 15,000

    Range of almost 1000 miles between fuel stops on the interstate.


    Want to know more? /forums/images/graemlins/whistling.gif




    2002 DMax/Allison 2500HD loaded Silverado Crew Cab 4x4.
    Stock except for 60 gallon tank and chip.
     
  6. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

    Joined:
    Jul 23, 2000
    Posts:
    36,170
    Likes Received:
    1,377
    Location:
    E-town baby!
    14 miles per imperial gallon or US gallon? /forums/images/graemlins/ears.gif

    Imperial Gallon is 4.54 liters
    US gallon is 3.78 liters.

    My spec's:

    1981 GMC F/S Jimmy
    6.2 diesel

    stock Air Filter
    Run whatever blend of diesel happens to be at the pumps
    230,000K
    SM 465
    200K-300K old
    NP 205
    No rebuild as far as I know
    D60, 14 FF
    4.56:1, open front, Detroit rear
    39.5x15x15 Swamper TSL's. I.E. suck for the road.

    16.3 miles per US gallon. /forums/images/graemlins/waytogo.gif

    Rene
     
  7. hawkeye649

    hawkeye649 1/2 ton status

    Joined:
    Mar 26, 2004
    Posts:
    848
    Likes Received:
    0
    Location:
    New Hamp-shi-ah
    No but I would like to know more about the truggy. Are there any kind of gassoline considerations on trail-only rigs? Mines going to be a DD too, so just like every other souse I'm looking for a good harmony.
     
  8. rubbinz raczn

    rubbinz raczn 1/2 ton status

    Joined:
    Oct 4, 2004
    Posts:
    656
    Likes Received:
    0
    Location:
    too far north!
    howbout a duramax trailrig article? anyone /forums/images/graemlins/dunno.gif
     
  9. hawkeye649

    hawkeye649 1/2 ton status

    Joined:
    Mar 26, 2004
    Posts:
    848
    Likes Received:
    0
    Location:
    New Hamp-shi-ah
    The 6.2 wasn't much in the go department, but got the gas millage.
    I always wondered why more people don't run diesels off road. Easier to water proof, and torque!!!
     
  10. joez

    joez 1/2 ton status

    Joined:
    Oct 21, 2003
    Posts:
    2,512
    Likes Received:
    0
    Location:
    New Lenox, Illinois
    85 K5.
    2" Body lift
    10 bolts, rear gov-bomb
    3.73 gears.
    Q78 TSL's (~36" tall)
    700R4 w/shift kit
    6.2 diesel-220K miles
    -Rebuilt pump, fuel screw increased to much
    -6.5 Injectors
    -J-code intake
    Heavy right foot.
    average mpg=20.

    same setup with 33" BFG radials that measure 31.5"- average MPG=23-24.
     
  11. BadDog

    BadDog SOL Staff Member Super Moderator Author

    Joined:
    Feb 24, 2001
    Posts:
    7,777
    Likes Received:
    11
    Location:
    Phoenix, AZ
    Nothing for the truggy. I kept it basically stock using off-the-shelf parts for easy repair and it will run fine on any automotive grade gasoline I can find anywhere. The TBI computer even compensates for altitude changes. That's nice considering I may go from sea level to 8k+ elevation from one trip to the next. I don't need or want tons of power, the stock TBI does just fine, what I do want is easy servicing with cheap parts and as robust as possible. Now if I can just get my suspension to be as robust as the drive train has been...

    DMax/Alli trail rig? Not till they get MUCH cheaper, and they are not light or small...
     
  12. pismorat

    pismorat 1/2 ton status

    Joined:
    Oct 29, 2002
    Posts:
    540
    Likes Received:
    2
    Location:
    California
    1979 Chevy 1/2 4x4 pickup
    406 CI 4-barrel, Edelbrock intake, headers, 3" flowmaster, MSD Ignition, Accel 300+ wires, 14" x 6" K&N Air Filter at 10* BTDC
    10K old rebuild.
    Run 87 o-tang for street, 91 o-tang for trails
    120,000K
    TH350
    3K old rebuild.
    NP203
    5K old rebuild.
    Front Dana 44 and rear 14bff
    3.73 gears, front posi, rear locked
    35x12.50x15 BFG Baja TA's (speedo is off)

    8 MPG with street driving/freeways in 2HI.
    2 MPG in 4LO romping on it in the dunes /forums/images/graemlins/peace.gif
    I have worn 36" swampers that I'll run for dunes from now on, and am going to get a cam like rfguitar eventually. /forums/images/graemlins/truck.gif
     
  13. BadDog

    BadDog SOL Staff Member Super Moderator Author

    Joined:
    Feb 24, 2001
    Posts:
    7,777
    Likes Received:
    11
    Location:
    Phoenix, AZ
    [ QUOTE ]
    The 6.2 wasn't much in the go department, but got the gas millage.
    I always wondered why more people don't run diesels off road. Easier to water proof, and torque!!!

    [/ QUOTE ]
    Plus weight, smell, mess (common), and noise. /forums/images/graemlins/laugh.gif But I gotta say, Rene's was nicely done and I had no problems with it on the trail (smell, noise, etc.). It worked very well IMO. If I were doing a daily driver with mpg and longevity concerns with solid off-road capability, I would probably be looking for a turbo 6.2/6.5.
     
  14. jms

    jms 1/2 ton status Author

    Joined:
    Jan 24, 2001
    Posts:
    1,683
    Likes Received:
    0
    Location:
    --
    [ QUOTE ]
    ... I am getting better at reading the cryptic signatures....

    [/ QUOTE ]

    350QKN70020845635:11 /forums/images/graemlins/tongue.gif /forums/images/graemlins/cool.gif
     
  15. K5MONSTERCHEV

    K5MONSTERCHEV 1/2 ton status

    Joined:
    Jan 27, 2003
    Posts:
    3,254
    Likes Received:
    0
    Location:
    Castro Valley, CA
    350 5k miles or so
    Cam, 15" vaccuum
    quadrajunk
    Performer, HEI
    Dual exhaust
    K&N
    8*
    NV4500
    14" lift
    4.10s
    38" Radials

    12 MPG

    Dont know how much it has increased after I did the TPI, for now ill estimate 14-15MPG.
     
  16. hawkeye649

    hawkeye649 1/2 ton status

    Joined:
    Mar 26, 2004
    Posts:
    848
    Likes Received:
    0
    Location:
    New Hamp-shi-ah
    [ QUOTE ]
    [ QUOTE ]
    ... I am getting better at reading the cryptic signatures....

    [/ QUOTE ]

    350QKN70020845635:11 /forums/images/graemlins/tongue.gif /forums/images/graemlins/cool.gif

    [/ QUOTE ]

    350 w/ quadrajet
    K&N(crap)
    TH700R4
    NP208

    4563???

    5.11's maybe...? /forums/images/graemlins/1zhelp.gif
     
  17. hawkeye649

    hawkeye649 1/2 ton status

    Joined:
    Mar 26, 2004
    Posts:
    848
    Likes Received:
    0
    Location:
    New Hamp-shi-ah
    How can you have a quadrajet (nice off-road & onroad carb) and TPi? I can't remember what it stands for exactly, but I'm about 90% sure it's a form of fuel inFection...
     
  18. Triaged

    Triaged 1/2 ton status

    Joined:
    Feb 21, 2001
    Posts:
    3,808
    Likes Received:
    0
    Location:
    CA (LA/OC area)
    1971 Chevy Blazer /forums/images/graemlins/k5.gif
    400 CID Small Block Chevy
    HEI with vacuum advance
    Stock Q-jet with choke wired open
    14x4" K&N open element w/ pre-filter
    Always use 87 octaine
    130,000 miles
    TH350 trans rebuilt by me
    NP205 T-case No rebuild as far as I know
    D44/14BFF 4.56 open/welded.
    36" TSL bias ply's on 15x10 wheels run at about 25psi on the street (when I remember to fill them).
    Soft top /forums/images/graemlins/thumb.gif


    8MPG hwy going 70mph Doubled it once following my budy's toy that has trouble going 55mph.
    Got 12mpg with 1/2 ton axles and 3.73 gears.
     
  19. RingMaster4x4

    RingMaster4x4 1/2 ton status Premium Member

    Joined:
    Mar 4, 2001
    Posts:
    2,049
    Likes Received:
    0
    Location:
    Bartlett, Texas
    1972 chevy blazer
    427 Tall Deck Holley carb.
    8" susp. lift (the other 10" is body lift and dropped spring hangers)
    Stock 14"x5" air cleaner
    87 Octane
    75,000
    was a TH350
    NP205
    Dana 60 & 14 bolt Full Floater,
    4.56 & Detroits
    44" ground hawgs ( they really measure 41")

    10-12 MPG
     
  20. 55Willy

    55Willy 3/4 ton status

    Joined:
    Jun 2, 2001
    Posts:
    9,946
    Likes Received:
    0
    Location:
    Keizer, Or
    456 gears 35 tires and 11 mpg
     

Share This Page