which belt to run without AC 07 Cayman?

[svandamme]

I have a stock 2007 Cayman
working AC

But for a track day at Spa Francorchamps, I wanna run lean
dump some weight, carpets, user manual you know, the easy fat.
Nothing permanent.


I figure I won't need AC in April.

Which length belt do I need to run it without the AC pulley??