Z_Dust Posted December 28, 2003 Share Posted December 28, 2003 I have been running an N47/F54 combo on my 77z for the last two months and I have to say that it's an OK setup for a NA engine. Problem is that now the car runs very hot all the time. The only way to keep the temp down is by driving on cool days with no thermostat. I'm sure the timing is off and may be one of the factors contributing to the problem. Is there anybody with this setup having this same problem. Can a bigger, four row radiator plus an electric fan help bring the temp down. Quote Link to comment Share on other sites More sharing options...
Drax240z Posted December 28, 2003 Share Posted December 28, 2003 I'd worry about your timing and mixture before spending money on anything else.... check your plugs and see if you are too lean. Run standard timing (what is it, 12* BTDC?) and richen up your mixture. Run high octane gas and make sure you aren't pinging. If you are still running too hot, then worry about other solutions. Quote Link to comment Share on other sites More sharing options...
280Zone Posted December 28, 2003 Share Posted December 28, 2003 Why aren't you using a thermostat? Running without one causes your car to run hot, contrary to popular belief. Quote Link to comment Share on other sites More sharing options...
Drax240z Posted December 29, 2003 Share Posted December 29, 2003 Crap I didn't even read that part. Absolutely you should be running with a thermostat. Quote Link to comment Share on other sites More sharing options...
Z_Dust Posted December 29, 2003 Author Share Posted December 29, 2003 I removed the old thermostat after testing it in hot water to see if it was opening a the right temperature. It started to open around 180* - 190*, but it would not open all the way. I figured that if there's no thermostat it will take longer for the engine to warm up but it would run cooler since there's continuous water/coolant flow. Mostly I was just testing to see if better coolant flow would bring the temp down, and it did, but it still goes way up after a few good WOT. What temperature range is best for a replacement thermostat? Quote Link to comment Share on other sites More sharing options...
Drax240z Posted December 29, 2003 Share Posted December 29, 2003 I'd suggest a thermostat that opens in the 180-200F range... I'd tend more to the 180 end of the scale. Quote Link to comment Share on other sites More sharing options...
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