I agree. But the motor should be able to take quite a bit. 8 psi is about the maximum safe limit without tighter engine management from most of the people I've talked with. I'm going to start with 5-6 then approach 7 after I've already adjusted the fuel with the additional injectors at the lower boost. If I get the HP numbers I want at 6 psi, then I'll leave it alone. But I know the engine will take 7. The M62 moves a lot of air so I might get the 180 WHP I want at 6 psi. Since no one else is doing this, I decided to go this route and explore. I'll be monitoring it with an A/F meter. Still shopping for parts for the system so it will be the end of the summer before this thing is blown I'm sure.