Quote:
Originally Posted by AZP Installs
Just as an FYI, we were running 290F at the track with no oil cooler running Motul 8100 0w20 or 5w30. Our coolant temps however didn't go above 205 when we had the stock rad. Once we moved to the Koyo Rad the temps don't go over 196 on track and now with our Perrin Oil Coolers we don't see more than 238 on track for oil temps.
If you are seeing high coolant temps on track, even with stock radiator, you may have another issue going on with your car.
-mike
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I have been using Koyo Rad for a long time
in fact I've installed the Radiator along with the supercharger kit, so I don't have any experience with stock radiator when boosted.. on very hot days and extended sessions, I was able to see the coolant temps go as high as 230s on many occasions .. what kind of mods are there on this specific car? what are the average RPMs throughout the sessions? ambient temps? track or auto-x events?
without some serious mods done for cooling, I don't think it's possible to keep the coolant temps below 210-220 (even with the Koyo Rad) when boosted or me driving it..if you think about it OEM thermostat starts allowing the flow after 194F and fully open at 203F by the time , for that specific reason I recently got a Cosworth Racing thermostat which will be installed soon.. they claim it allows the flow at 169F and fully opened at 194F..my friend was able to lower his coolant temps by 15-20 degrees on his Miata and keep it stable at around 210-220F when running without a thermostat, with a thermostat it might be a little better
