in the next couple weeks my motor will be done and out of the shop.i plan on using 11.5 comp ratio cp pistons and already have eagle h beams. would it be very risky running this big shot on say 12ish compression ratio? if i just retard the hell out of my timing will i be good? i will have a good tune using hondata s300 with a 255 fuel pump

 

Go read up in the official nitrous thread. This has been covered numerous times.