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Long story short I blew my SVTF Powerworks engine due to a bad fuel pump. I have since now rebuilt the engine and fired it up and it runs (haven't driven it yet) I had to go with JE forged pistons which changed my compression ratio from 10.2:1 to 9.6:1 and bored it 27 thousandths over to fit the 85mm pistons. My question is without touching the ECU tuning, is my car going to run richer or leaner at this point. How dangerous is it to drive while on this change. I also have eagle forged rods.
 

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Should run a bit richer, shaving the head a bit and/or using a Zetec hug would have helped. Shouldn't affect to much
 
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