Pretty sure you are talking about the ECU whine. It is a known issue that bothers some and not others. Depends on your hearing. Younger women have the best ears for hearing it. There was one guy who took it to a dealer, and they didn't want to acknowledge the problem until the young secretary rode along and noticed the whine immediately. The fix is replacing the ECU.
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2011 370Z 6MT Sport Gun Metallic | ARC | CJM | Ecutek | FI | Fujimura | R2C | SPL | Stillen | TWM | Z1 | ZSpeed | |