Have you changed fuel settings yet?
Boost is largely dependent on the amount of fuel burnt or AFRs.
Burn more fuel, make more boost.
You can limit boost two ways.
Reduce fuel settings, you'll reduce drive energy and also reduce power output.
Waste gate the turbo, excess energy bypasses the turbo.
If you've seen an increase in boost levels, but haven't touched fuel I'd check waste gate first.
Has something happened to prevent it getting a true boost signal?
If wastegate seems okay, check your fuel system. Do you have a boost compensator on the IP?
Also, I guess you still have no EGT probe sorted? If engine temps are rising, I'd suspect AFRs as being the problem, not an increase in intake air temps.
Your new turbo should be a lot more efficient than the old one. Yes, at 19 psi intake temps will be higher than at 14psi, but unless there's another problem or you're pushing it really hard up long hill climbs I don't think the intake air temp will be causing engine temps to rise much at all.
Up to a point, more boost should reduce EGT because it changes the AFR, if you push the turbo way outside it's efficiency range, you'll be adding to much heat. But I doubt 19psi will be the problem alone.
