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compression to high???????

Discussion in 'The Garage' started by sjeccles, Jan 19, 2003.

  1. sjeccles

    sjeccles Registered Member

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    Is it possible that rings have trouble setting because of to high of compression? I have about 3000 miles on my engine and it still burns a lot of oil. So I pulled the spark plugs and all 8 of them were very oily. I did a compression check and all the cylinders were 230-240 psi. So I’m wondering if the compression is just so high that the rings can’t get seated. I’m using chromoly rings. Originally I was going to run 76cc heads but found a good deal on some 58cc heads so I used those. This might be my problem

    Thanks
     
  2. Sandman

    Sandman 3/4 ton status Author

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    That does sound pretty high. Do you have trouble with pinging?
     
  3. DesertDueler

    DesertDueler 1/2 ton status

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    That is too high for 92 octane. The highest cranking compression for 91 octane is 175-180 psi. Also cromoloy rings take longer to set. Another thing is you could have too big of a ring gap.
     
  4. sjeccles

    sjeccles Registered Member

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    I have not noticed pinging but it a TBi so the computer and knock sensor could be retatding it before I could hear it
     
  5. Z3PR

    Z3PR Banned

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    I'm not a fan of the 305 heads (58cc) I really like 64cc heads like These heads [​IMG]
     
  6. Sandman

    Sandman 3/4 ton status Author

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    If the timings getting that retarded, you might be shooting yourself in the foot to make decent power. Might consider swapping out the heads. /forums/images/graemlins/tongue.gif
     

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