What kind of coolant were you using when your car spiked up in temp?
I never ran my car on a track course. I don't ever plan on it since my entire set up would be useless on a track but for highway runs, I've taken it up to 180ish and let go. Boost cut off is at 32psi. After a few back to back runs my coolant temps would shoot around 220F.
I've been using the blue Honda coolant. That $hit has been working wonders for me. Maybe you should try the Honda coolant.
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