Correct engine coolant temperature - ZR-1 Net Registry Forums

secondchance · 06-01-2009

I have a 94 which means I have a luxury of digital temp readings which 91 does not.

Mine use to run at 198 F at highway speed in cool day and around 202 F on hot weather. What this corresponds to on analog is tough.

As for bumper to bumper, with out AC on, she would reach 223 F at which point fan would kick on and bring down to 218 F or so and turn off until temp would reach 223 or so.

On hot day with AC on, one fan would be running constantly keeping the temp somewhat lower, say about 3-5 degrees.

I wouldn't try to estimate engine temp on analog gage. They are just not that accurate. I see you are in California. How hot a day are we talking about?

Recently I switched to Marc Haibeck chip and and one feature I really appreciate is his cooling fan strategy. Since the switch my Z has been running about 8 to 10 degrees cooler in stop and go traffic.

06-01-2009	#8
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,732	Re: Correct engine coolant temperature I have a 94 which means I have a luxury of digital temp readings which 91 does not. Mine use to run at 198 F at highway speed in cool day and around 202 F on hot weather. What this corresponds to on analog is tough. As for bumper to bumper, with out AC on, she would reach 223 F at which point fan would kick on and bring down to 218 F or so and turn off until temp would reach 223 or so. On hot day with AC on, one fan would be running constantly keeping the temp somewhat lower, say about 3-5 degrees. I wouldn't try to estimate engine temp on analog gage. They are just not that accurate. I see you are in California. How hot a day are we talking about? Recently I switched to Marc Haibeck chip and and one feature I really appreciate is his cooling fan strategy. Since the switch my Z has been running about 8 to 10 degrees cooler in stop and go traffic.