I read this whole thread. I was gonna say something as soon as I saw 488/491, and 2200/2400.
But I forced myself to read to the end.
No one asked what your cylinder pressure is ,
nor at what altitude you are at.
These are key pieces of information, along with the Ica of your cam.
I'll bet you are at 1000 ft or more.
I'll bet your cylinder pressure is less than 130 psi
I'll be your Ica is greater than 64*
And I'll bet that thing is a dog below 3000 rpm.
Now, cough up the numbers so we can develop a cure and not just bandaid the crap out of it.
If you don't know the Ica of your cam, cough up what you do know.
And cough up the part number of your pistons or give us the measured deck height and whether or not it has eyebrows. And finally, have the heasd been milled and if yes, cough up the measured head-volume.
lol
