When I was considering radiators for the Nova, I looked at a lot of different options - DeWitt’s, PRC, AFCO, Entropy, AutoRad, C&R and others. The early Chevy II’s don’t have much space up front for a large radiator, so core size is pretty limited without completely redoing the core support and filler panels. Most of the available radiators have stock core dimensions. AutoRad makes a custom unit that is beautiful - custom core support and filler panels which open up the space to run a much larger core; however, my front end was already set up for the stock core support and I wanted to incorporate an engine oil cooler and power steering cooler into the radiator as well.
I ended up purchasing a radiator from C&R Racing with dual Spal fans as it was the best overall compromise for me. The end tanks are designed in a way that allows a meaningfully larger core size than a stock sized unit, but still fits within the frame rails of the DSE subframe (although I will need to make some minor modifications to enlarge the core opening and flatten the surfaces of the core support on either side of the radiator, but those shouldn’t be a big deal). It also integrates an engine oil cooler and power steering cooler into the radiator as well. Finally, C&R built it using their new extruded core technology, which provides more efficient cooling and higher strength than traditional cores. So. I’m pretty happy with it, and it should provide plenty of cooling for the LS7.
My plan is to run the fans using PWM fan control from the ECU. Thanks to all who contributed to the excellent thread on PWM fan control - it’s filled with really helpful information. I picked up a new fan assembly for a Cadillac XLR with the factory PWM controller and related wiring/connectors, etc. on eBay. My plan is to set up the PWM output in my Holley Dominator ECU using tables with multiple triggers (e.g., speed, A/C on, coolant temp, etc), similar to what andrewb70 outlined in that thread. Attached is a picture of the radiator from C&R.
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