Adding the gauge was sort of a last minute decision so we didn’t have a solution for mounting the gauge beyond a small bracket we asked for from Autometer. Upon examining locations in the car we couldn’t find a permanent place to mount the gauge quickly, so we temporally mounted it on the lowered glove compartment and secured it with blue painters tape.
After kicking around a few ideas about permanently mounting the gauge an a-pillar mount is what we’re probably going to end up doing. There isn’t a low location that doesn’t interfere with leg room and on the dash like the 370z factory gauges would prove difficult with wiring. We’ve got a little fusible link powering the gauge for the time-being until we can make the whole setup more permanent.
As far as engine coolant temps go, we took measurements before and after installing the CSF radiator. We collected our data towards the tail end of the Phoenix summer with 110 degrees as the ambient outside temperature. We recorded 201 degrees engine coolant temperature on the OE system with freshly flushed factory coolant. After the CSF radiator install we observed slightly cooler engine coolant temperatures on the same exact drive – 196 degrees.
I consulted chief nerd Mike Kojima for his engineering view on our results. His view is that 194 degrees is the full opening point of the thermostat. With the CSF radiator we’re running closer to the thermostat full opening point with an engine coolant temp of 196 vs. 201 degrees stock. I did a lot of back to back testing on the OE system and 201 degrees seemed to be the coolant temp even when the outside temp would go +/- 5 degrees in the extreme heat. Both before and after a coolant flush. We’ll be doing some more follow up tests to see how much ambient temp effects the coolant temp.
With an upgraded cooling system and a way to monitor our transmission temps, we are ready for the next step in our G37’s transmission upgrade. In our next article we will get into the detail of our Level 10 transmission upgrade and new engine and transmission tunes from UpRev.