In that application I agree that EGTs have limited usefulness and one reason is that the load your engine sees on the dyno can be a lot different than what it is on the street, so your actual EGT reading on a dyno will have less relevance. But don't assume when you are out on the street that just because your wideband O2 tells you your A/F is in the norm that you are necessarily "OK" otherwise. EGT data is still an important part of the puzzle and its not the instantaneous data that's so important as much as the trends. Its learning what is a "safe" normal EGT reading for your car in its condition in various operating environments, so you then have a reference to compare to.
Z-Jay Vice President - Edmonton Z Car Club 93 300ZX TT - Stage VI
