We've always had with the Titan 875 not producing temperatures much better than 220 degree, even at full power, with a 1.6 litre engine burning a litre of fuel every 6 minutes, a massive blower, ambient and water-to-water heat exchangers, all working with massive lengths of hose, bringing the whole system under massive stress and generating huge heat, you'd think!
We placed the set screw orifice which we discovered had a fracture (which could have been there from when it was built) in it allowing hot water to circulate the system which overheated the water box causing it to dump a lot and thereby lower the solution temp.
As soon as we replaced the orifice holder and changed to a smaller orifice and adjusted the regulator a bit, hey presto the temperature rocketed up to and held way over 250 degrees, way more than it had never done before.
Glynn has an uncanny knowledge of the how these sophisticated systems work, which i have to admit baffles me, especially with the 875 having a telephone exchange worth of cables and electronics, so it's official, the guy is a genius and with it a great friend, so thanks, Glynn.
You're still a bfecfl tho!
Simon