604 radiators

I was just wondering i have been told that some people had trouble keeping the gm 604's cool at wvms and the bigger tracks? Do u think a double pass radiator would help?? I run single pass and you cant get my 604 hot but i didnt run at wvms??? Thanks

We ran Oglethorpe which is just at 5/8 mile and ran a single pass, GM fan, 1:1 pulleys and never had issues, also no issues at Golden Isles which was pretty much 6800 all the way around the track for the whole race.