just bought my third rs turbo g reg with low comp pistons kent cam gas flowed head felpro head gasket stage 1 hybird turbo radtec front mount intercooler power enginering chip been rolling roaded at 198 bhp with graph to prove it has a low temp fan switch

when i get stuck in traffic it still get hot the temp just climbs up and up but when i give it some it cools right back how can i keep it cool in trafffic it has two rad fans but it does not seem to help its still runing the standard rad is this the problem

any help would be great