Alright so my r32 with a s2 rb25det started pinging at about half to 3/4 throttle in 3rd a little bit when i turned the boost up to 9psi with a boost t. I installed a adjustable fpr and up the pressure slightly to about 40psi. The pinging stopped but at a drift day i was at yesterday i noticed it doing it under hard acceleration in second gear. The car is stock apart from the basic fmic exhaust boost t and fpr. Any ideas on what could be causing it? Timing was checked a while ago and it was correct. Only started doing it since the boost was set at 9psi