I'm going to give as many details as I can think of.
99 GSR
sleeved b20, wiseco/eagle, 9.5:1
b16 head
ITR intake
topmount, hx40 with BEP .70 a/r hotside
chipped p72 running neptune with a Moates Demon
2150cc FIC injectors, E85
The problem is this: the engine is cutting out under a moderate load. Initially after I got the engine put together, I began tuning on our dyno and made 323whp at 5800rpms under about 22psi when it sarted cutting out. I tried and tried and tried to tune it out. Got rid of the MSD crap that was on the car. After that a rod bearing ate itself. I rebuilt the engine complete with a new crank because mine was bent .030". All back together with a new distributor and nothing has changed. Before today I could hold 8ish psi to redline and it was fine. More than that and it spits and sputters. I have checked ECU power and grounds. The engine and body are grounded correctly. Switching between an emulator and a burned chip makes no difference. I am leaning towards ECU at his time but figured I'd ask around a little.
Thanks in advance for any insight. I am at my wits end.
Chris