170 lbs compression

Engine, Trans & Driveline

  1. gtxrt

    gtxrt Well-Known Member

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    what do you guys think on a new rebuilt street engine with 170 lbs of cranking compression, to high or low or just about right. runs good with 35-36 total timing. 217-221 on 110 LSA with 107 centerline.
     
  2. 440Coronet500

    440Coronet500 Well-Known Member

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    Perfect compression for a street car, should make good power if the rest of the components are properly matched. 440'
     
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    • Gunner1

      Gunner1 Well-Known Member

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      Do you know your static compression?
       
    • IQ52

      IQ52 Well-Known Member

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      "runs good......"

      So......let's go looking for trouble.

      If it ain't broke don't fix it.
       
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      • gtxrt

        gtxrt Well-Known Member

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        9.65
         
      • Frank Mopar

        Frank Mopar Well-Known Member

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        170 what my drag car is. 440ci. Runs between 7.10-20 all day long.
         
      • Gunner1

        Gunner1 Well-Known Member

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        No ping, your golden. mine running 175. but mine pings. installing a new dist to replace the old worn out one. mine advances way too far.
         
      • gtxrt

        gtxrt Well-Known Member

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        had mine recurved for 12* initial and not all in till 3600 rpms. total 35*-36* it also has 915 heads and has a total of 54 thousand quench with the 44 thousand head gasket and pistons 10 thousand in the hole.
         
      • Gunner1

        Gunner1 Well-Known Member

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        I have speed Pro forged flat tops. Looks like 7 to 10 down the hole. Suppose to be 452 heads with a felpro gasket. I bought a bore scope to see what was inside. I set up my MSD for 12 and 34@3600 also. Going to have my new Isky 292 mega cam and lifters installed at the same time.
         
      • gtxrt

        gtxrt Well-Known Member

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        seem like you have around 10:1 compression. what cam you running now
         
        Last edited: May 16, 2022
      • Gunner1

        Gunner1 Well-Known Member

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        Unknown but it sounds mild.
         
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