Don't know about the LT1 OE fan-on thresholds for '92 & '93, but they were set so high from '94-'97 that the powertrain usually runs considerably much hotter in stop'n'go traffic than on the highway. NomakeWan's observations about the cooling system are absolutely spot on.
I can sort of get why GM would prefer LT1s to run 32°F hotter in stop'n'go than on the highway (except for sedans & wagons with big ol' mech fans that cost 10 peak horse), but this is easily fixed by lowering the fan-on thresholds to keep temps more consistent across driving conditions.
If both fans are on by 212°F / 100°C instead of 235°F / 113°C, it's one less thing to worry about, and a much larger safety margin.
Bookmarks