The cp4 is good for about 520-550 rwhp, the turbo is out of air around the same numbers...
Ps some cp4's are weaker than others, I have had trucks not hold rail pressure with the box h&s fuel duration... so there can be a big difference between trucks
I generally get 18-19 normal driving... all hghway I have seen 24.8...that's on 295/70/18 terra grapplers and fully deleted with other things I can't talk about lol
Depends...stock turbo yes...if you went with a bigger conventional it won't spool like the stocker can so you wana give it a little more rpm to build boost with...
The stock turbo does pretty good with a 2000 rpm stall speed... lower hasn't been tested as far as I know, it would prolly do good...
I have used
rotella T 15w-40
Rotella t6 5w-40
Valvoline blue 15w-40
Valvoline extreme 5w-40
I'm using mobil 1 0w-40 euro spec with the archoil oil additive right now...
Nothing has made a difference, as soon as it warms up its tick city lol
I might try 5w-50 next