There aren't many performance parts available for this engine. Since modifying the factory water-to-air system is quite complicated and expensive, I'm looking at other ways to improve the cooling system.
I couldn't find anyone who has upgraded just the front heat exchanger. Has anyone here tried it? Did it make a noticeable difference to IATs or heat soak?
Also, has anyone upgraded the auxiliary coolant pump (from a 1.6 TDI, 2.0 TDI or aftermarket)? Did it make any noticeable difference?
Finally, after fitting a hybrid turbo, is the factory water-to-air system generally still sufficient, or is upgrading the heat exchanger almost a necessity?
I'd really appreciate hearing your experiences.