I have a t3t4 sr20de with weisco/eagle, JWT ECU, 50lb-3bar, JWT fuel rail, 300zxMAF and fuel pump. Finally broke my engine in and was playing with the boost (I normally run with the EBC turned off, so about 7psi), and I noticed that around 10-12 psi I can hear what I think is detonation. The car pulls strong at 10psi, with no hesitation or hickups, but I hear like marbles in a tin can, or somesort of rattling sound. I run 93 octane and I checked my FPR, which is at 44psi with the vacuum tube conected at idle. Maybe I'm asking too much from the car? I plan on dynoing this weekend, so I hope to get some answers there, but I thought I'd post here to see what anyone thought?