Stopping the knock: Lower compression and ported heads...

*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.

That calculator is making an assumption on seat timing IMO and is giving false numbers. Take out the +15° and Dynamic is just over 9.0.
Considering this is your first time degreeing a cam and given the cranking compression of 190lbs, the one possible solutiuon is the cam is advanced roughly 10°. That also puts your Dynamic at 9.5.
Something to check.



Perhaps it's time to consider that both hydraulic and solid cam timing events are recorded on the cam card at .050" lift, but during the engine operation with a solid cam, those events will be altered buy the valve lash, and the valve will be opening later and closing earlier. With a hydraulic cam and solid cam having EXACTLY the same timing events at .050", the solid will build more cylinder pressure because of the valve lash, which is not included at .050" on the cam card. Oh-Oh. IT'S SIMPLE. Too much static compression and/or not a big enough cam! Get it right and you can lock the distributor and run 38 degrees advance and it won't detonate.

Forget about running the compression on the edge. My 451 runs 9.5:1 compression and makes 694 HP with 906 heads.

Cylinder heads, cylinder heads, cylinder heads make horsepower on a pump gas street engine, not compression!

Curses, I broke my rule about not getting involved.

The hydraulic is a .000" lash design, and the lobes are designed that way, and the numbers will reflect that.
Lash on the other hand will alter the numbers as stated, however, not all manufactures list duration numbers the same way. For example Jones Cams are listed with actual hot lash numbers.