I see... how often do you get on the track then? and no, motorkhana days doing one lap wonders don't count. When was the last sprint or enduro race you entered? Cos a radiator that size is only ever gonna be of use when you have massive heat soak to dissipate. You're running a thrmo fan with no shroud on a street driven car, which will result in pisspoor airflow through the fins in stop start low speed driving.
It's true, I hardpark my daily... ever since I got 3 dents in my daily at deca i refuse to track em. That's why I have a perfectly good stripped out, rollcaged race car sitting at driftline for when I got out to winton etc (running a triple core koyo rad and a couple of thermo fans off some ford)... which is for sale btw, as I won't have a shop to maintain it or time to race it.
What I'm getting at is that making a daily driver into a "track ready" car is an expensive, uncomfortable process. You'd be better off just buying a cheap second car and going balls out on making it an all out track car. Your car's emo enough as it is, the more you push it, the more things are gonna break.
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