too hot? too lean?!!!!

[idiot goes sideways]

problem,
was installing a "exhaust temp. gauge" with some problems,
but finaly it`s working.

the problem starts under driving, cause on uphill with full throtle the exhaust temp goes to 930° celsius.

i`m not to sure but i heard the limit on lightly tuned cars is around 700-800° celsius?

like i said the exhaust-gas get without problems 930° celsius!!!!
what means that i`m running too lean !!!!!!!!!!!!!!!!
sorry no a/f gauge on board

what make me uneasy now is how hot can get the exhaust temp without damage the engine/turbo??

i got a rebuild ca18det with stock internals and these stuff

air intake
race header
3inch free-flow exhaust
rebuild stock t25 turbo
big fmic ( i know a small turbo like t25 on a big fmic!!?, but hey i`m working on it to get a bigger one)
one step colder spark plugs, 7 i think
power fc
running 1 bar on this small turbo
and after rebuilding the engine the compression is now at 8.8 - 1

maybe i worry to much cause i drove with these setup around 1500miles and the car never show a heat problem with oil and water,

otherwise i serios damage the engÃ*ne

please help, thanks