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Gas mileage with the F-134

Discussion in 'Early CJ5 and CJ6 Tech' started by Doug/Tucson, Apr 14, 2007.

  1. Apr 14, 2007
    Doug/Tucson

    Doug/Tucson Member

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    Mar 17, 2007
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    I have already been to the archives, and although there is a lot of information there. It is not all specific to the F-134:hurrican:
    since I have one very well broken in 1963
    and one rebilt year unknown, and since I have no gas gauge
    or odometer, this would be a very difficult thing to figure out on my own
    I was hoping without all of the antipollution devices. It would do pretty well
    I am only looking for an estimate
    Doug/Tucson:driving:
     
  2. Apr 14, 2007
    Desert Runner

    Desert Runner Member 2024 Sponsor 2022 Sponsor

    Hickory, Pa
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    From the past threads, with
    org carb 10-13
    weber carb 13-15

    Hope this helps
    Jay
     
  3. Apr 14, 2007
    Doug/Tucson

    Doug/Tucson Member

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    It has the original carburetor 10 to 13 mpg is very depressing. I was hoping since it's such a small motor and vehicle. It would do better than that. Has anybody had better luck
    Doug
     
  4. Apr 14, 2007
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
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    The Jeep also has 5.38:1 gears and all the aerodynamics of a cinder block. Driven conservatively on the flats you might do 15-18 but that's probably pushing it.
     
  5. Apr 14, 2007
    mb82

    mb82 I feel great!

    Charlottesville Va
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    Really it depends on many factors, such as tiresize, gearing, OD/not, speed at which you are driving. Also it is an older motor and is not as efficent as modern engines along with the fact it is only 72HP pushing something that weighs in at around 2500lbs and has the aerodynamics of a slightly chiseled brick.

    IIRC Hawkes62cj5 told me he had someplace found a calculation site that said for his setup in his 5 the ideal speed for mileage was like 34mph, anything faster then that and it was going to go down.
     
  6. Apr 14, 2007
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Like Steve said, 15 to 18 is a good range.
     
  7. Apr 14, 2007
    Doug/Tucson

    Doug/Tucson Member

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    The city of Tucson is basically flat, and I drive it very easy rarely going over 35 miles an hour. I was hoping for better miles per gallon, but it is a box without any consideration for aerodynamics and since these motors were built in the late 50s and early 60s. When gas was $.20 a gallon. I can see where they wouldn't do very well. Since gas mileage was not a consideration. Thanks for your replies. I will simply have to wait until I get new speedometers and working gas gauges. I am a little depressed that they don't do better. But this is probably why I'm constantly running out of gas
    Doug/Tucson
     
  8. Apr 15, 2007
    weedy

    weedy Member

    Conroe, Tx
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    I get around 18-19 mpg
     
  9. Apr 15, 2007
    kaiser_willys

    kaiser_willys Well-Known Member

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    what gears you runnin,and what trans,and do you have OD:? :)
     
  10. Apr 15, 2007
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
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    Tucson ain't exactly flat, (neither is Phoenix, for that matter), plus all the stop and go in traffic to and from home and work. How much do you lead foot it, and do you have the 5.38's like I do?

    Getting an overdrive from Herm's will help. Also, are you still running the original carb? One of the Solex's will improve your gas mileage some.

    I run through 5 to 7 gallons in about 100 miles. That seems to be about normal for them. At 7 gallons per 100 miles that is around 14 mpg. give or take.
    An overdrive would boost that. Going to 4.11 gears front and rear would boost that. Depends on your experteeze. Mine runs to installing the overdrive, but not to setting up the ring and pinon for changing the gears. Wish it did.coffe:
    :)
     
  11. Apr 15, 2007
    Executioner

    Executioner Member

    Reading,Pa, USA
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    R) R) R) R) I was thinkin more like an open umbrella but that just about sums it up! R)
     
  12. Apr 15, 2007
    CJ-X

    CJ-X Member

    Ohio
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    It's all about the gears.
     
  13. Apr 16, 2007
    robbieyukon

    robbieyukon New Member

    central MD
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    Apr 21, 2006
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    IMO, gas is cheap compaired to the pleasure i get in driving my 69 fiver. i have 5.38s and a t98. i think i get 10mpg but i also have 34"s. gas means notta to me.
     
    Cowboyjeeper likes this.
  14. Apr 16, 2007
    Doug/Tucson

    Doug/Tucson Member

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    Okay Tucson isn't dead flat. It does have some very minor roles, driving east to west and a slight downgrade, heading north to the river. Then you get into the foothills and you will encounter some serious grades but for arguments sake It's pretty flat in the city and you'd need to be riding a bicycle In most areas to really know. I know it's dangerous to run out of gas, but since it happens to me regularly. (no gas gauge) and Tucson is a grid city with the major intersections being one-mile apart. The next time I run out of gasoline, alongside my 5 gallon spare tank. I can carry a 1 gallon tank, and then drive from one end of Tucson to the other. I'm told it's over 15 miles across, and although this would only be an estimate it would be close enough
    and since I will be driving in the city, where I normally do anyway. This would be a pretty accurate measurement of my gas mileage.
    somewhat crazy! But it should work
    Doug
     
  15. Apr 16, 2007
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
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    Yup, put exactly a gallon in when you run out, write down your mileage from the odometer, run her till she quits again, and write down the mileage. You now know pretty close how far you can go before running out.

    The speedometer in my '60 isn't stock. Didn't know it till I read the discussion on them last week. Goes from 5 mph to 85 mph, all orange lettering and numbers, but also has kph marks on it. They didn't do that back in 1960. Not till 69 or 70, if memory serves. Has the gas gauge in the lower right hand quarter and the temp gauge in the lower left. What is your problem with yours? Cables? wiring? or just egocentric, like some of them can be?
     
  16. Apr 16, 2007
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
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    Wait till it rains again. Then you will really know where all the down grades are , and which way they run.
     
  17. Apr 17, 2007
    tomcam

    tomcam Member

    Savannah Tn.
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    Isnt Tuscon also fairly high elev. your carb might be jetted a little rich. just a thought
     
  18. Apr 17, 2007
    Doug/Tucson

    Doug/Tucson Member

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    yes Tucson is about 2300 feet. I'm not sure how much this well affect the mileage due to the altitude and the air of being thinner. I might be running a little rich, but the spark plugs looked right is't possible that a PO had it rejeted
    for this altitude. I can't be sure, and as far as the rain, this is how I learned that all the water heads north. There are very few sewer drains, so most of the water runs on the streets. Unlike most roads, our streets are lower in the middle and actually act as drainage ditches
    Doug/Tucson
     
  19. Apr 17, 2007
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
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    I find it hilarious that the streets have better water flow characteristics than the canals do.;), :coffee:, :rofl:
     
  20. Apr 17, 2007
    Hawk62cj5

    Hawk62cj5 Captain of OldSchool

    Brodnax Va.
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    Mine , maybe 14ish . When i had a third gear 35 was ideal cruising speed after that the gas gauge falls alot faster. On the trails it does great for the time running , 3-6 gals a day . Windrock I burnt 6 gals but there was alot of "highspeed " driving there.
     
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