twins and cp3
#2
#5
#6
I agree with 06 Diesel. You can drain the rail with stock sticks and very aggresive tuning. Rule of thumb at our shop, anything over a 60 stick and rail pressure will become an issue. To eliminate any guessing get a rail pressure guage and monitor it on the various levels of programming you will be running. You will see a drop as soon as you stab it but a healthy system will recover and maintain 24-26,000 psi. Also get a good lift pump.