i want to know how much of a diff would 10:5.1 pistons make would i have to lower the boost to 15 psi to make up for the extra press or can i just go all out and push 20 psi and how much hp would i expect keep in mind that if i get pistons im getting rods to so i mean the motor would be good for it but i dont hear to much about the 10:5.1 compresion