I have a 32 with rb20det and always had heat problems. I knew cos i got oil and water temp gauges after it overheated a couple of times.
I got an ebay radiator, no difference.
I got an oil cooler, small difference.
I removed the aircon, no difference.
I got a GTR front bar, huge difference. Airflow is everything.
If it was done in reverse order id see what difference there was between each change.
The thermos are there cos i cant fit the factory fan cos of a cheap intercooler pipng kit.
So now ill experiment with corflute and duct tape to make some deflectors/vents, as after reading this thread im sure its the way to go.
A cheap radiator and intercooler should be fine with enough airflow, right?
Shes a bit rough, many things made from scrap metal with hand tools.