You won't need to increase the boost unless you're chasing the performance. In that case you'll be wanting more fuel and boost.

Once you get your pyro gauge installed it'll make a lot more sense. Make sure the temp probe is installed before the turbo, after the turbo isn't as relevant.

More air (from higher boost) = cooler exhaust temps
Better intercooler = cooler exhaust temps
More fuel = hotter exhaust temps.