Sr20det High Rpm Split Second Bog Down

[Autobacs]

OK Folks, hopefully one of you can shed light on this.

SR20DET is built, 740cc, 3076R, Walbro 255, 15 degrees timing, JWT ECU, FMIC and more. I'm running hard boosting at 18 PSI and engine is pulling strong then suddenly it bogs down around 6,500 RPM then picks up again. This bog down is instantaneous and last only for say half a second then the engine picks up again and redlines. My gut feeling and the closest thing I can think of is it seemed like somebody just turned off the power (electronic/electrical) for a split second and then turned it on again. Just put new NGK BKR8's with at .7 mm gap. This happens I'd say 1 times out 4 that I punch it hard. On my dyno runs, both boost and AFR's were good and even.

Igniter? Coilpacks? anything else? I'm sure somebody out there has experienced this. Hook me up with some info!