Join Date: Apr 2019
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8 degrees of st knock from 4500 to 6300rpm
I have a 2005 dodge magnum rt. new to this site wondering if someone could help. I just installed heads, cam on my 5.7 I went with xfi260h13 from comp cams with the beehive valve springs, diamond power valves, new valve seals, ported heads port to match, comps hi tech push rods, timing chain set, shorty headers, water pump, 180 tstat, all new bolts and gaskets full exhausts, 3.90 gear, 27-10-15 Hoosier slicks, 150 nx wet shot.
The problem I am having is and 4500 to 6300 when it shifts I am getting 8.5 of st knock and nothing i do seems to fix the problem I have zip tied any loose parts that may have been tapping the engine. I have also put 2 bottles of octane booster in to make around 98 octane didn’t not seem to help a bit and replace both knock sensor with standard. Went through checks all my rockers and pushrods again and changed oil Hemifever added fuel and pulled timing nothing seems to help still have st knock at high rpm under load only