Joules,
TX .. any though helps me to improve the nice cat..
1) the cooling system is ABSOLUTELY up to speed. The Thermo switch is designed corectly and goes on and off AT TRAFFIC LIght or garage at idle. All new wiring and relais etc.
2) the Thermosdad was checked in a cooking pot (with permission) and is correctly working ..and is the one with the special ring at the bottom of the cylinder
3) the 20 lib DID NOT blow off - I think it never opend..as the overflow tank is still 50% full as from preload (even AFTER THE loss of all water)
4) Tank from HAll requies a short neck litt = app 19 mm, I have that set up
5) Italian instrument reading needs to be REVALIDATED ..very good point!!!
6) Waterpump and pully are top end Edelbrok pump and SACC pully (-10%)
7) system was bleeded ..several times ref to Jack's advice
8) after fixing the camps and refull I will measure the temp per external device
Current judgement:
Must be the wrong clamps..too small width and the fixture force not good enough as they are "bend in design - worm gear" on the band vs a full Metric/or SAE screw set up.
...MIGHT NEED OTHER THOUGHTs though..
TX for thinking this through....
Matthias