did the gemi radiator swap finnaly today, did not use the huyandai excell top hose, used a 120y top hose and the stock botoom hose.
It now runs at 170 deg faranheight all day except stopped in heavy bumper to bumpertraffic where it reaches 185 deg f and once moving again hovers at 180 till in open air once more.
And heres a tip if you want to use the 120y radiatr hose in a larger pipe, microwave it for 10seconds and it is flexible enough to be pushed over the outlet pipe of the radiator.
The kettle water wasnt hot enough to soften the radiator pipe.

Much nicer to drive without one eye on the temp. gauge It still amazes me how some people upgrade everything else and adapt a "she'll be right" attitude about cooling Money spent on a good cooling system not only saves the engine but also saves your sanity Good to hear that all has ended well!
Cheers

yeah thats right R-Fast...I spent $55 for a fully flushed gemini radiator at pick n Payless Blacktown and under extreme conditions such as racing it never got above 180F I also run a large oil cooler which keeps the oil in the bottom channels cool and viscous.

i have a gemi radiator in mine, and an intercooler in front of it, i also have the cooler thermostat in (around 76 degrees instead of 86 or something), it holds beautifully on the cooler temp, well below half on the guage, until i stop in traffic or at lights where it heats up like crazy, i also have a shroud on the radiator (its not an ideal shroud but better than nothing)

any clues on what is causing this?

i reckon the amount of heat from the twin turbos would be helping somewhat. maybe a bonnet scoop would be an idea to try flush some of the hot air out, just an idea...

Hey 1200,
just a thought here, but a radiator needs airflow to exchange the heat in the tubes and fins to the atmosphere. I don't know the details about your intercooler but it would seem that when you are mobile there is enough air forced through the intercooler (which warms it slightly) to draw heat from your radiator. When stopped, all components heat up (including the intercoler) hence the radiator is only being fed a reduced amount of air which is being pre heated by the intercooler. Also, the fan(s) you are running may be struggling to pull enough air through both restrictions (ie I/C and rad.) If your shroud is not ideal then air drawn in will follow the path of least resistance - around the rad. rather than through! The long and short of it is that the cooling system (as with a turbo) needs airflow (preferably cool!) to operate efficiently. Have seen this problem more than once when people obstruct air paths with banks of driving lights or very fine mesh screens etc. Suddenly the cooling system cannot overcome the reduced surface area or static pressure.
Hope this gives some food for thought !
Cheers

Well, would it help to have the electric fan running in reverse so its sucking air THROUGH the radiator and intercooler into the engine bay? instead of blowing out?
just an idea..

hehe, it sure would help.