Normal temp on ls1
Complete internet heresay regurgitation......

nncfan8 prolly nailed it. That is right where my 98 runs with a 160* t-stat....
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The '98 is more sensitive, and will show much more minor changes in temp.
I've spent time monitoring actual temps (via my PCM scanner) vs. what's shown on the gage on both my '98 and my '02 car. The '98s are definitely more sensitive and accurate.
The factory T-stat is an 86°C unit, which converts to 186-187°F. The factory fan settings will allow the coolant to reach temps into the 230° range under some conditons. I stick with the stock stat, and tune the fans to never allow coolant temps to exceed 210°F. While cruising, my temps are usually in the mid-190s.
The '98 is more sensitive, and will show much more minor changes in temp.
I've spent time monitoring actual temps (via my PCM scanner) vs. what's shown on the gage on both my '98 and my '02 car. The '98s are definitely more sensitive and accurate.
The computer is not set to run "best" at any temp. There are spark and fuel maps for all temp ranges, anything above 176°F is considered fully warm by the PCM. Now, that's not to say that the engine doesn't have a "best" temp, and I agree that a T-stat should be used. My experiance is that my LS1s seem to run best in the 195-205 degree range.
The factory T-stat is an 86°C unit, which converts to 186-187°F. The factory fan settings will allow the coolant to reach temps into the 230° range under some conditons. I stick with the stock stat, and tune the fans to never allow coolant temps to exceed 210°F. While cruising, my temps are usually in the mid-190s.
Personally, I would never use a 160 stat for most NA setups. On the other hand, if you have super high compression, or forced induction/power adder, then I would consider it depending on climate.








