Originally Posted by maxcichon

Mine keeps IAT within ~ 10-12 degrees F of ambient. Under all conditions, so long as I'm actually moving. Heatsoak is overcome within ~ 1 minute after I start moving again, due to the small mass of my components. Except, of course, for the SST y-pipe.

Let me clarify:

that 10-12 degrees is with an ambient of 90+.

I haven't made measurements at 50 F. I think there is a linear diversion as ambient temps rise.