silviaNC

Hi guys, trying to figure out the reason why my sr coolant temp will rise from 190 f cruising to up to 235f(reading on upper neck) when boosting.it will go up almost instantly. I can take it easy amd drive for hours without a problem but as soon as I step on it it will rise the temp 25 degrees and take a while to start going down.
My setup
Koyo rad
Alum shroud
Isis fans
Nismo thermo
Fans on from the get go

Things I checked:
Water pump is pumping
Thermo is opening
Did a leak chemical test and came up good.
Going to do a compression test in the morning
Seems to use a lil bit of coolant after a 70 mile drive

What else could I check? So wierd I cam drive car all day long and be within 190-210 but when boosting....