Anyone (all years) can benifit from a AFPR. If you want to extract all you can it is highly recommended that you data log pressure and AFR. You would be amazed at how much AF will change with weather.
Dyno tuning will tell you what AFR makes the most power or torque and than you ajust the FP to match that number on track for that day. In most cases Dyno FP will not match on track FP.
Another benifit of logging pressure is when a pump starts going bad you can replace it before it cost you a race.
Great advice, Ralph, I agree with this 1000%. Fuel pressure logging or gauging is HUGELY underappreciated, and even more important than wideband A/F if you ask me, since fuel pressure is a cause and A/F is a resulting effect. When you are on the dyno, you aren't going left or right at 1g. I always had a fuel pressure gauge in my car. If/When the car stumbles, I would look at it - and if it was solid, I knew my problem WASN'T fuel. And if the fuel pressure WAS varying, I knew I had a problem.
'99+ fuel pumps ... (Start at 3:00 or so if you are short on time! ...)
http://youtu.be/C7isPYGG-To