I suggest bleeding the cooling system.

 

it is pretty tricky to do it correctly and get all the air out

 

I too recommend to try to bleed the system. Does your heater blow very hot. If not you have air in your cooling system.

 

Mine doesn't go over 202 degrees.

 

Mine stays right over 185 driving and sometimes goes up to 205 if in sitting in traffic but I'm using a glow shift gauge so not sure how accurate those are???

 

I dunno man, I have hot lapped before at the track in 80F and at the end at the top of 5th through the traps it maybe hit 205. I would do a thorough flushing of the coolant, replace and realllllly bleed it well. Find a huge incline, lol. Also, don't use water wetter or anything like that,just the Honda Stuff.

 

when I was a Honda tech I would raise the front of the car 2 feet that puts the radiator cap at the highest part of the system will make it easier like I said that aftercooler really slows the air down one thing you need is a low temp thermostat switch to kick those fans on sooner and an ap2 170 f thermostat

 

I have a giant fmic in front of my radiator and never see those temps. Bleed the system. It's a giant pita but once done the stock rad and fans work well for street FI s2k. Trust me your upgraded exchanger is not as big or thick as my fmic

 

i have same issues with my car, my fmic is decent sized but air can still get by the corners. when its 110 here my car runs about 205-208 with ac off and 215+ with ac on, thats on the hwy

got me a new shrouded fan setup and that seemed to help, but it hasnt been 110 lately either

 

stock radiator?