72 posts and nowhere did I see a timing curve,compression results, or jetting loops, or even that the fuel was fresh 93 octane.
The single biggest contributor to Detonation is in-chamber heat.I did not read anywhere about what circumstances lead to the detonation.There are so many things and so many ways, and................not one word.
Oh wait,"Not sure on the timing. Haven't had time to get out there and check it. I know the timing is close to where it needs to be. It starts with a bump."
This is about the silliest detonation diagnoses I've ever read.
Now heres the thing; by dropping the compression with open chamber heads, thus loosing that fabulous .039quench, and then introducing an earlier closing intake, you are moving in every wrong direction. Your Dcr could very well go up, and without the favorable quench, you may end up with even more detonation.
Your cylinder pressure is so easy to measure.and
Your compression ratio is so easy to figure out.and
Your timing is so easy to measure. and
Your fuel grade and freshness is so easy to change.and
Your lifter preload is so easy to measure.
I hate to sound like a jerk, but hey,you look like your drowning.