When you increase the power of the engine you also increase the heat output. I tried a good quality SPAL fan on a stock radiator before I switched to a Wes Ingram cross flow aluminum radiator with built in oil cooler. I posted the details. The oil cooler made a difference.
76 Suzuki GT500
2011 Jaguar XKR
A little government and a little luck are necessary in life, but only a fool trusts either of them. - P.J. O'Rourke