It can be done and I don't blame you given all the time and expense you vested just to get motor running right. Initially, remove 3 degrees of timing per psi and you should be fine given your compression ratio. Then add back one half degree increments of timing until HP is maxed and no detonation.No, I won't be messing with the head now. I have no reason to run anything higher than 6psi. 6psi should put me around 325 hp. Its a safe amount and won't grenade the engine. The engine wasn't designed with boost in mind and I'm going to see if it can be done.
Because I have $2000 to pay someone to do that. Care to donate? I could also add an inter cooler at the same time for an extra $1000. And I would have a very nice $3000 manifold to run 6psi boost on something that is worth maybe $6000.
You should have bought a Honda if you were worried about resale value. lol. Is your time worth nothing? How many hours of labor do you have invested; how much for machine work; how much for parts; how much for storage room; how much for mp90; by engineering standards you are over budget as it appears the $6k mark past long ago. Most enthusiast don't care about resale -they want what they want.
Not to mention lack of room in the engine bay to make the intake runners truly the same length. lol.
At the 8th wave-set the runners would be half the length. However, just by some rudimentary calculations I did for you since based upon your statement I perceived you had no clue what I was talking about and these calculations made using the "Helmholtz" equation, using the 4th wave-set from the center of valve stem to center of throttle body should be 12.95 inches if your max boost is approx 2500rpm.
The cam sensor signal needs to be retarded with CPS so the PCM doesn't make noise. It doesn't like it when the two signals don't stay with each other.
The engine doesn't like the injectors firing at the wrong time in relation to ignition; not to mention, wet fuel can get drawn into other cylinders it wasn't meant for. I know nothing about the AEM piggyback you are using, but if it's inherent design is to give end user the ability to adjust timing and fuel -then I'd not second guess the engineers, and I am not saying they are always right, or that their designs are flawless(some of the time it is the budget constraints they work under).