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Norm Peterson · 05-03-2019, 07:23 AM

RBF600 is perhaps the most commonly chosen fluid when people move up to something in the 600-ish dry boiling/400-ish wet boiling neighborhood. For many people, that seems to be sufficient, so they stick with it.

660 has a little higher dry BP than 600 (617F vs 594F claimed), but depending on whose data you look at the 660's wet bp may be lower than the 600's. For that reason, 660 may take a little more maintenance in order to maintain its temperature advantage.

Norm

05-03-2019, 07:23 AM	#61
Norm Peterson corner barstool sitter Drives: 08 Mustang GT, 19 WRX Join Date: Jul 2012 Location: Eastern Time Zone Posts: 6,990	RBF600 is perhaps the most commonly chosen fluid when people move up to something in the 600-ish dry boiling/400-ish wet boiling neighborhood. For many people, that seems to be sufficient, so they stick with it. 660 has a little higher dry BP than 600 (617F vs 594F claimed), but depending on whose data you look at the 660's wet bp may be lower than the 600's. For that reason, 660 may take a little more maintenance in order to maintain its temperature advantage. Norm __________________ '08 GT coupe 5M (the occasional track toy) '19 WRX 6M (the family sedan . . . seriously)