its not a CA, but my rb20 sits at about 88-90 degrees in say, maccas drive thru or in crawling traffic.
cruising on a normal day is around 84-86.

During normal driving mine sits at 82 to 85 degrees but if I am sitting in traffic it will climb towards 100 degrees very quickly. I am running a brand new factory SR20DET radiator and twin 10" Craig Davies thermo fans. I have a mechanical water temperature sensor mounted in the top radiator hose. The factory coolant temperature sensor is hooked up to my factory gauge and sits in the middle at 82 degrees. I have twin 12" fans to mount shortly and, if this doesn't help I will purchase a 32mm radiator as I think the problem is related to a lack of coolant capacity (heat soak) rather than an airflow issue.

I have a 13 row Serck oil cooler mounted in the front bumper. Oil temps sit around 100 -110 degrees during normal driving but reach 130 degrees during track sprints. If you find a less obtrusive place to mount your oil cooler please let me know as I hate where mine is currently. I mucked around for months trying to find a better place but was unsuccessful.

Matty