That reminds me, I'm pretty sure I've read you can change the pulley size for higher flow rates as well. Don't know if it's a factory thing or not.There is an option in the datasheet # S823 and S283Afor the Z3.
cars that are UAE and Tropical Africa specd have it.
the difference i see is the deflection pulley or at least that is what TIS told me.
searched it on real oem and found this diagram.
not sure about the actual difference…..
But this is the only difference for hot climates.
no thermostat from what i see
View attachment 239281
Thanks for clarifying Tony.The only difference is how quickly it reaches that temperature, whether it’s a road car or a race engine it will eventually get to its operating temp when the stat opens and it will stay in that operating window.
Tony.