Is the Vtec operation of the 6th Gen Accords similar to Integras and preludes? While going through some documents there was some info i might have misunderstood. I always thought the Vtec switched over at 5250 RPM or something similar at certain percentage of throttle and load. The F23 reds at say 6300. So I could see why the ceiling would be done differently. Is it possible the Accords F23 Vtec keeps the 2 valves shut for mileage and emissions? Then opens only for a throttle percentage ? When my accord was stock a hardwired LED from the VAFC harness showed Vtec actuating at low RPMs like 2500. I cannot find a Vtec spec in the manual section, and that is suspicious. This would need to be tuned differently then a B or H because the hi cam / low cam RPM range is the same. Am I on the right track here understanding this? Currently my Vtec parameter is set wndowed 5000 upper at 15", lower 4000 at 1" vacuum in Hondata's Smanager. It was my understanding it was delayed for an RPM when I tuned it. This might not be true. I might need to revisit this tune. It has been years since I built these. I kept poor notes , and records. So I need to catch up on it all again. Then again I might just be paranoid.