Exactly - those plugs were after the days running & a cool down lap - it also seems I have the right heat grade plugs
Yes oil is cooled by water, but the water temp was good @ 80-88C.. Turbo oil return is directly back to the sump - I think I just need an extra or bigger oil cooler. I use Miller CFS oil, which is rated for 125C with peak temp of 150C, so I am just ok with the temps, but would like to be down at 120-125C as a maximum.
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