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Spark plugs and tire pressure

Discussion in 'Early CJ5 and CJ6 Tech' started by manden68, Sep 4, 2004.

  1. Sep 4, 2004
    manden68

    manden68 Member

    O Fries Country
    Joined:
    Jul 16, 2003
    Messages:
    214
    How much psi should I be running? 31x10.50 15s. And what spark plugs are you guys using on your V6s?
     
  2. Sep 4, 2004
    James P. Enderwies

    James P. Enderwies Sponsor

    Lake Havasu City, AZ
    Joined:
    Feb 2, 2003
    Messages:
    747
    I run 25 psi in my 33's. For plugs I use Bosch Platinums, the regular ones, not the fancy 2 or 4 ground ones. Last at least 2 years. :)
     
  3. Sep 4, 2004
    Boyink

    Boyink Super Moderator Staff Member

    Tulsa, OK
    Joined:
    Sep 20, 2002
    Messages:
    6,193
    Marc - psi will vary Jeep to Jeep due to weight and tire construction. The best way to figure out what you need is to use chalk and mark lines across the tread. Then go out and drive it some. You want the chalk to wear off evenly -- if it wears in the middle first, let some air out. If it wears on the outside edges first, put more in.

    I found about 22 psi was good in Dutch, but will have to experiment again with SSDutch.
     
  4. Sep 4, 2004
    Jeepenstein

    Jeepenstein Me like Jeep..

    North Central FL
    Joined:
    Jun 15, 2003
    Messages:
    2,132
    I was down to 12 in my 31's but those tires had extremely stiff sidewalls... as for plugs, it's preference really.. I use bosch supers.. they wear fast (like 30K) but they perform well with hot ignitions due to the copper center. denso or NGK are great but overkill and the best plug you can get is the BERU silverstone, waaaaaaaaaaaay overkill for a jeep...


    BUBBA
     
  5. Sep 4, 2004
    66cj5

    66cj5 Jeep with no name

    NorthWest Indiana
    Joined:
    Sep 10, 2003
    Messages:
    2,084
    use ac delco. nothing fancy.
     
  6. Sep 4, 2004
    manden68

    manden68 Member

    O Fries Country
    Joined:
    Jul 16, 2003
    Messages:
    214
    Thanks. I like that chalk idea but I'm going to have to wait until Frances' backside is far gone.
     
  7. Sep 4, 2004
    James P. Enderwies

    James P. Enderwies Sponsor

    Lake Havasu City, AZ
    Joined:
    Feb 2, 2003
    Messages:
    747
    Marc: Yea, Mike has a great idea. Never thought of that. :oops: I like Bosch Platinums. Used them ever since they came out in my Yukon. They are a very wide heat range. They burn kind of, how should I say it, WHITE in the :v6: . But I've had no problems with ping or anything, so I think I'm fine.
     
  8. Sep 4, 2004
    Bob

    Bob Member

    Northern California
    Joined:
    Sep 23, 2002
    Messages:
    436
    I'm running 25 psi in 31x10.50's and AC Rapidfire #7 plugs.
     
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