Motor Ford Escort adjustment

How they hear a question I am fixing my escort I want to lower the heads to achieve greater compression, but I don't know how much the max is. I could lower them someone could tell me the tolerance they have thank you very much ....

The rectifiers handle those data but have an eye with those engines when you revive a lot you have to be very careful with the packaging since this vehicle has to warm away. In every CACO I think 1mm is the recommended top.

I have a MK2 Ford Escort the one that appears in my photo. I reduce the cylinder cover 2 mm and parted it due to excess comprehensive. If the 1mm discounts are much more powerful, the sound of the engine will change a bit, if you like the car with free escape as you are going to notice that it sounds a little more serious and with a faster tone