[72dan]

I track my car. I have all four CSF heat exchangers.
Was at Auto Club Speedway this weekend, fast track 140 mph on the straight.
Oil temp went over 270 and still climbing when I pulled off track.
Two sessions 15 minutes each.

Motor is stock, 50K miles. Cold air, Turner single crank underdrive pulley.

I wonder if the underdrive pulley is slowing the water pump too much.
I ran the heater in session 2 full blast still 270 oil.
I was lifting a second or two early and coasting before braking coming into some high speed corners to try and help, didn't do much.

I was 1/2 quart low on oil don't know if that is enough to make a difference.

Could I have an air bubble in the motor from the radiator exchange?

265/30/19 front, 275/35/19 rear Advan AD08R, Forgeline GA3R 19 x 9.5" and 19 x 10.5" Stoptech Trophy, Pagid RS29, full monoball suspension, solid subframe mounts, 3 way adjustable coilovers, adjustable swaybars.