Whenever I'm in Manila and I'm with my dad in his SiR, he turns off his AC compressor whenever he goes WOT (around 8500rpm, maybe higher - I don't remember his max engine speed). Alam ko for slow and weak cars, this is beneficial to gain more HP. But for an SiR, I'm sure the power is not an issue.

He also said that having the AC on (compressor engaged) and running at that high engine speed causes AC compressor damage so he turns it off para hindi masira. So my question is, is this true? Or sabi sabi lang yon?

The moment it reaches Vtec (I don't remember, maybe 6200rpm? Maybe lower, he's modified it a lot...) is the moment he turns off the AC.

Salamat