so i just dynoed 2 stock 17 zl1 camaros A10, both had the exact same 20-30hp drop at 5900 rpm in 6th gear, i can feel it but nothing in the tune shows it. rock solid cam timing, spark timing, afr, narrowband voltages, tps. Everything checks out great. Everyone notice this? both cars continued to do it after some tuning as well.
funny thing is there are ZERO issues in 5th gear and 7th gear, no drops anywhere.
any ideas?