Not true Not true at all.... the zetec engine 1.8/2.0 internals are quite strong.No problem coping with the increased compression when you change your 2.0 head with 1.8. SO if you're running a 2.0 zetec in focus with full exhaust ,head ported (1.8 to benefit from the high compression) and the cams and pulleys it WILL be a nice and quite powerful daily driver. N/A ALL THE WAY mate!!!!!!!!! No regrets at all! I don't know what are the gains from the increased compression ONLY but I'm sure it'll be around 10hp.