A counterpoint: when I was running my turbo Subaru RX at higher boost I was told to use just water and Red Line Water Wetter during the summer. The RLWW had the inhibitors and anti-corrosion, and the pressure in the system was high enough to prevent boilover - and the pure water cooled a lot better than the AF/W mix. From staying around half-gauge, my car never went over 1/3 - until winter, when I started using anti-freeze again (RLWW has no freeze inhibitors) and even in the cold weather the temp still went half-way. No I don't know at what temps the fans came on; there were two electric and one always was on with the AC or as needed (like the Vette) and the other turned on and off by temp.
The performance shop that did my turbo work recommended the RLWW; they raced boosted Gen 2 turbo RX-7's (400 HP) with it and were working on an LSR Porsche 930 that also used it.
[RICHR]
The performance shop that did my turbo work recommended the RLWW; they raced boosted Gen 2 turbo RX-7's (400 HP) with it and were working on an LSR Porsche 930 that also used it.
[RICHR]