I bought a 2005 coupe. Is normal for the temp guage to sit at half way and creep over half only to go back down a tad during normal driving ?

 

Sounds just like mine. Old thermostat and new one.

 

Normal, but I hate it. They designed the car such that the fan turns on about 18F higher than the thermostat opens. I had the "-10c" mod done and now mine never quite makes it to halfway, no matter the temperature outside OR if I am moving or not.

The mod costs $50 at Buckhead Imports in Atlanta. They simply plug into the diagnostic connector and tell the PTCM to turn the fan on 10 degrees C (which is 18F) lower than factory.

 

Here is mine when the outdoor temp was 104 degrees

 

My UltraGauge shows mine as a constant 185 F when driving 55 - 75.
In traffic, it shows it can go as high as 210 F :

At 185, the temp gauge is one needle width below center, at 210 it is slightly above center.

 

Anyone know if the 18F fan mod is included in the Eurocharged tune?

 

Must be...both mine run just below half...

 

Thanks Doc...I thought I had read that somewhere. Both of mine also run just below half.

 

I think Rudy talked about this... that when they tune the cars, they (no kidding) assume you are going to be DRIVING the car, and this is part of how they - how did he say it - keep the car ready to "RUN". That is, this keeps you ahead of the game heat-wise.

Mine never reaches the center mark now, no matter how hot it gets here in Georgia!

 

Mark, you must not be pushing it enough. Just sayin'...

 

Mine is EuroCharged, still runs between 186 & 210 ........

a/c off, hiway = 186
a/c on hiway = 192
a/c off city = 200
a/c on city = 210

 

I don't know, I took the tread off a pair of rear tires in less than 11,000 miles.
If I push it any more, I'm gonna run outta tire money, two sets of tires in 11 months!