I redid my whole cooling system this spring in preparation for the hot Vegas summer. Summer comes along and bam the temp would creep more into the warm zone than I'd like.
Climbing long hi way grades with a/c would creep it up to the 220 mark.
Slapped on a 16psi stant cap and it doesn't go past 215 in any situation.
9 degrees is a big difference. At 72 degrees most people are nice and cool add just 9 degrees and most people are too warm.
Same for the engine. At 210 degrees nice and normal. Add just just 9 more degrees and shes running too warm for comfort.
Down here in the desert makes you realize how gigantic a 10 degree difference is.