LOL, it must sound like I know what i'm talking about! (I have no idea lol)
To be honest, indoors i've tried a lot out and the main thing that cools these motors down is the timing ramp. (Timing Punch).
First of all, i'd run about setting 4 on timing punch. If you're using 1 or 2 then that might explain your temp issues. I think if the car is punching straight to top speed and revving early that might be giving you temp issues.
I remember frying a SP V1 13.5 at Maritime because I geared it too high and it was screaming all the way down the straight. It sounded great but doing 70,000 on the sweeper and geared at 8.50 FDR is not good lol!
To give an idea about how timing isn't the killer of these motors, I used a 13.5 GM last thursday with advanced timing on the motor, but geared at 6.8, instead of 7.2, timing punch 5, turbo max and this 13.5 was as fast as most 10.5s out there, if not faster but it was strangely only 140F.
The week before I used the same motor with stock timing on the motor, Timing punch 2, geared at 7.2, one down from max turbo and the motor was 160F. Even though the motor had less timing and and less esc timing, the setting with much more overall timing was much easier to drive.
Try this at Maritime -
stock motor timing
FDR 7.00
9 - 8
12 - 9
13 - 1
14 - 3
15 - 5
The timing ramp would work out 3000 - 17700 before the turbo kicks in.
I'm using this exact setting next time myself.