ryaneverk2 is right - provided your Attitude gets the EGT before the turbo. If it gets it post-turbo, then nobody can give you a good answer except to move the thermocouple to before the turbo. /ubbthreads/images/graemlins/cool.gif
International engineers told us you can cruise all day long at 1,200 pre-turbo EGT, but 1,250 is the red line. So when mountain climbing I "drive by the gauges" and try to maintain about 1,200 to 1,250 EGT. That's usually 55 to 60 MPH up 7 percent interstate grades with my 8,000-pound 5er and my hot-rod towing machine.
For turbo boost (intake manifold pressure), they told us 25 PSI is the red line with a stock turbo. You might get away with more - or you might not. /ubbthreads/images/graemlins/cool.gif On mine, if I don't cross the red line for EGT, then the boost will be below the red line too.