Stopping the knock: Lower compression and ported heads...
Was the block honed with a torque plate?
Looks like it may be sucking some oil thru the guides too.
Was the cam degreed and actually verified intake and exhaust lobes are what they are suppose to be?
With your numbers I also get 10.7:1 CR, but cranking should only be 177 lbs at most. Your dynamic is 9.08, not 8.0 with that cam in at 106.
If you had 1cc of carbon buildup in there it would be pretty bad looking. That's not changing your CR enough to matter.
I don't see 190 lbs on pump gas being a problem either. I can however see your ignition causing issues.
Personally I highly recommend putting it on a dyno with someone that has good tuning knowledge.
*The block was bored and honed. Torque plate? I'll have to check on that. I think the machinist said the machine is a Sunnen CK10?
*I incorrectly ran the engine for awhile with the intake manifold bolts too loose. Somehow I had my torque numbers wrong and I had them in at 15 lbs insteads of 35. I used to occasionally see oil in the valley pan under the middle of the manifold. I replaced the valley pan and didn't see any more oil come back. This was one of many areas I thought may be contributing to the knocking. It does look to be responsible for the carbon buildup, at least in my opinion.
*This was my first time degreeing the cam. I used the intake centerline method written in the instructions included with the degree kit. I never checked the exhaust lobes.
*I was pretty diligent about checking compression #s after every change I made. Maybe my guage is AFU. I will certainly retest the engine after it is up and running again. I can compare the new readings against what I recorded before, THEN recheck the engine with a higher quality guage.
*My Dynamic compression readings were calculated from this site:
https://www.uempistons.com/index.ph...=comp2&zenid=5886b5a1e26a6addce30f95974e64ff7
I listed the stroke as 4.15, the CR at 10.73 and the rod length at 6.76. For the intake closing, I took the 56.5 degrees from the cam card and added 15 for a 71.5 total. This gave me a Dynamic of 8.09. I'm open to look at other formulas though....
*In 2005 I had it tuned at a shop with a dyno. It was there where the man recurved the distributor, added bigger jets and advised me to get a more modern cam. I've followed the advice of some very qualified people and still have run into trouble.
