The n1 water pump is designed to not cavitate at constant high rpm and still flow water. In stop/go traffic it does not fair so well. So Im sure that is not helping.
I also would be 100% sure you have bled the cooling system well.
Quote:
Originally Posted by smoked240
If I turn either off it will go up a lot. I have a n1 water pump and nismo thermostat.
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Just a tip, remove the nismo t-stat if you aren't tuned for it. It runs the engine cooler(when you solve your cooling problem)and will leave it in the last block of cold enrichment on stock maps.