I was out messing with the dart a little bit today after mowing and rechecked the cylinder pressure with the throttle open and got 170psi. Does that sound more on par with 10:1?
without knowing the displacement and Ica, it could be 12/1 or 9/1 or anything in between.
I am trying to be helpful............
I got this;
"Its a 372, 360 .060 over 10:1 with iron heads." and this
" 2100 to 2500"
