Hi

As the ba model use a 125kpa/18 psi radiator cap can you go from 16 psi/110kpa to 18psi/125kpa in a ef coolant tank and not cause damage to cooling system

If you have a colder thermostat does that reduce pressure in system when using a 110cap

What psi caps and temp thermostat do people use without using more fuel

Ask one of your "MATES".

Or ask your girlfriend, if no girlfriend get one of your mates to hook you up

Why not stick with what it came with from factory sounds like the best idea to me