icanfixall
Official GMM hand model
no. the turbo idi is still the same cr as the na engine is, 21 1/2 to 1. only one year of the 6.9 was differant being 20.1 to 1 cr i believe.
Good, now all we need is a Vetrinarian syringe and a PS piston to feed liquid into to determine it's CC approximately that is...and compare pin heights and we are golden.The Pre cup in my Turbo heads with a injector and glow plug installed is 20cc volume. The volume of the piston top depressions is about 8cc. Now you need the cc's of the hole inside on a psd piston. In a IDI when you add a cc of volume you drop compression about .47 compression...