Ive never heard of 14.1 compression before tho myself..usually the bore is no more than .25 .... really forreal forreal, on his engine (guessing it is some type of honda/acura engine) he will get more power by upping the compression than boring it out ....and i would still really like to know what kind of engine this is that we are talking about...i certainly hope its not a d series engine, because if it then scratch everything i have just said