I paid 2080 last year when I was tagged speeding near Luisita exit. What the enforcer told me is that cruising at 120kmh will be just fine but not over. I think their radar equipment has an error variance since I knew I was doing much faster than the speed they indicated on the ticket.

I am more familiar with the Subic-branch of SCTEX so I know where to floor that accelerator. The Porac-Floridablanca stretch is long enough to get you over 200kmh assuming your car has enough oomph. Be careful near the Clark South and Dinalupihan exits. I found that there are no speed enforcement at night, maybe their equipment has no night-vision capability. If you do happen to cruise past 120kmh on a day time, watch out for parked white or gray Innovas/pickups on the side of the road. You can spot them a few kilometers away so you have enough time to slow down. The Tarlac-branch of SCTEX is a bit tricky as speed enforcers are hiding behind flyover columns. A man is harder to spot than a vehicle and it is even harder if they use the column's shadow to their advantage.