What is a good exhaust gas temp? At idle? At cruise? At full throttle? This is all on a basically stock '87 with only a few fuel system mods, so shoot for stock boost levels. I've looked all over the forums, but I can't find anything relating to this subject. Would it be better to have a pyrometer or an air/fuel ratio gauge? I've heard that the a/f gauges can be inaccurate and fluctuate while driving, making the pyrometer better to measure the tune.