The most efficient 17 setup is 8 & 8 215/245
here's a 225255 compared to 215/245, you do get mor grip but most don't need it
If going to 225/255, you do lose some accelerative torque but gain grip, to maximize that you want a 9.5 or 10 in back, 9.5 I know fits because that's what I use, I have seen 10s on track cars but don't know the details of what was done to fit them, the tire is the limiting factor, I've used 275/40 on the 9.5 and it was a lot of work to fit, 255/on 9.5 is easy
