Well I debated about getting an Mazda rx2 rad like demacoz for thicker core but smaller surface area, but after reading up I should be increasing surface area before getting a thicker core.
This is to solve my spike of temps in traffic and when giving it a boot along.

Once it heats up in traffic, the single 10 inch pusher fan maintains it's temp but doesn't dramatically decrease the temp til moving again- which can be a problem in summer.
So I binned the idea of a different rad for now thinking should I add another 10inch fan and run 2 x 10inch fans to cool it or just upgrade to a single 12inch?

I know piggy uses a single 12 inch on a stock camry rad on both his l and ca set ups and it foes the job... So it's proven on his set up, wonder wtf going on with mine!

My fan pushes air through the rad and yes polarity and fan blade profile correct for this set up. I've done the paper sucking and pushing tests with the air flow on it.

And don- yes I replaced the rad cap, same symptoms.