CR and pump gas question

yellow rose said

I've done the reading. And also the testing. Again, head materiel is about the last factor in compression ratio.

I can run just as much CR on iron as I can aluminum. It's that simple.

Click to expand...

So having seen the aluminum vs iron tests I wanted to click 'Like' above but I went 'Agree' seemed to fit better. So down here, 'Like' 'Like' 'Like' 'Like'!

I too have had no problem running the iron