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134 4 cyl

Discussion in 'Early CJ5 and CJ6 Tech' started by weedy, Apr 20, 2005.

  1. Apr 20, 2005
    weedy

    weedy Member

    Conroe, Tx
    Joined:
    Apr 19, 2005
    Messages:
    156
    This little dude does not like speeds over 55 - 60. What is a safe speed I can cruise this dude at without engine damage?

    I currently drive it ten miles to a bus stop with speed at 55 mph for about 5 minutes. Does anyone see problems with this?

    I am guessing that 55 mph is about 2500 - 2600 rpm from a chart I got from the internet.

    specs: 4.27 gearing, 3 spd, 134 cui.

    http://www.public.asu.edu/~grover/willys/speed.html
     
    weedy, Apr 20, 2005
    #1
  2. Apr 20, 2005
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
    Messages:
    23,596
    Measure the height of your tires. Any height over 27" should be ok at 55, I'd think.

    A lot of the problem is the aerodynamics and low power-to-weight ratio. Not much left at that speed, even with the best possible choice of gear ratios.
     
    timgr, Apr 20, 2005
    #2
  3. Apr 20, 2005
    blevisay

    blevisay Oh Noooooooooooooooo! Staff Member

    Portland Tn.
    Joined:
    Sep 20, 2002
    Messages:
    4,350
    IMO
    All day at 55.......
     
    blevisay, Apr 20, 2005
    #3
  4. Apr 20, 2005
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
    Joined:
    Jul 30, 2003
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    8,524
    what Billy said
     
    jpflat2a, Apr 20, 2005
    #4
  5. Apr 20, 2005
    weedy

    weedy Member

    Conroe, Tx
    Joined:
    Apr 19, 2005
    Messages:
    156
    Good. Honestly, I am shocked that folks would want to drive these short CJ-5s any faster than 55 - 60. They seem to be a little squirely after 55. My brother has a 78 CJ-5 (wheelbase is a little longer than mine and has a 6cyl) and he keeps his below 60.
     
    weedy, Apr 20, 2005
    #5
  6. Apr 20, 2005
    65CJ5

    65CJ5 Member

    Albuquerque
    Joined:
    Sep 22, 2002
    Messages:
    156
    Without an overdrive I'd say 55 is the absolute top end for it. With an overdrive about 65 is all you can do on level ground!
     
    65CJ5, Apr 20, 2005
    #6
  7. Apr 20, 2005
    Fhead Guy

    Fhead Guy Member

    Northern VA
    Joined:
    Apr 29, 2003
    Messages:
    83
    Re top speed, if your rig is squirrelly @ 50 or so, you need to look it over closely - tires/wheels, steering gear, etc. I run mine at 65-70, with no worries, wobbles, etc. - but I'm running essentially a new '59 CJ5 - everything has been rebuilt or is new.

    FWIW-
     
    Fhead Guy, Apr 20, 2005
    #7
  8. Apr 20, 2005
    TjWheelin85

    TjWheelin85 New Member

    Reisterstown, MD
    Joined:
    Nov 30, 2004
    Messages:
    23
    I used to be able to run my 52 M38A1 at around 50MPH with 5.38's and 31" tires... i don't get much above 25mph now. But at 50mph with the ross box steering can get a little fun!!
     
    TjWheelin85, Apr 20, 2005
    #8
  9. Apr 21, 2005
    weedy

    weedy Member

    Conroe, Tx
    Joined:
    Apr 19, 2005
    Messages:
    156
    This is my first jeep so I am not used to this short of a wheelbase. I have driven quite a few CJ7s which seeem 'not as squirrelly' on the road at highway speeds. I guess I needed to clarify 'squirrely' driving.

    I drive a Hemi Ram 4 door with 20" tires which will cruise at 90 mph effortlessly. My jeep is half as long and weighs less than 1/2 the truck which would not drive as stable as what I normally drive on the highway...


    The jeep is a toy that I purchased to replace a Ploaris Sportsman 500 4 wheeler. It is a great part-time driver offering me efficient transportation back and forth to the park and ride (bus), around town errunds and off roading fun (that hauls four instead of one on the 4 wheeler)..
     
    weedy, Apr 21, 2005
    #9
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