Exactly my point.
The big block guys want to say they can get the weight of a big block down to small block weight.
Just stupid.
And when spring gets here it will come up again and be equally as stupid.
I read that.
But, this is the same argument that gets repeated over and over and over.
No matter what you do, the big block will always weigh more than a small block.
The first thing you need to do is physically measure your compression ratio.
If you have a detonation issue I suspect it’s probably not from too much compression.
If your cam is on a 108 LSA and you install it on a 108 ICL you will center the overlap triangle or you’ll be in split overlap or you’ll be in straight up.
Whatever term you want to use.
I certainly wouldn’t advance it.
Ok, figure .034 out. His deep is the recess in the chamber. IIRC at 68cc’s you’ll still be .065-.070 deep.
Minus .034 gives you .031-.036 piston to head clearance.
Add .039 for the gasket and you are .073-.078 quench.
I damn sure wouldn’t use the thicker gasket.
What is the advertised duration numbers and what does the cam card say for an ICL.
I’m not a fan of those lifters on a cam that small.
How far are the pistons out of the hole?