All TCM turbosupercharged fuel injected engines use fuel enrichment at full throttle/max power, and I would expect the Lycoming engines do as well.
No separate ADI for cooling, so fuel is used, and is a well known procedure...for a very long time.
The upper CHT limit on my TCM turbo motors is 460degrees F, and at a full power climb (no 5 minute limit with these engines) the CHT approach 440.
Having said this, these engines have aluminum cylinder heads, and the aluminum alloy used will exhibit stress cracking if the temp exceeds 410 F(approximately) for prolonged periods.
This leads to compression leaks/cylinder failure down the line...and big bucks to fix.
Better to keep the CHT 380F or below, for optimum results.