6 replies to this topic

[vxr36]

Lokking for some tech advice please. I am watching my temp guage vary dramatically. I suspect it is faulty but I would like to know roughly what it should be reading. I have a charge cooler fitted and the probe is right above the manifold. Some days it reads just above ambient (eg 6 to 17 degrees) Other days like today it was around the 60 to 70 mark. One day it went to 230 degrees.

[Jive]

You need to speek to the people that fitted the cc. Around 60-70 degrees if i had to guess, maybe a little lower as you have a charge cooler something like 45-50. Im not sure really. All the same it sholud not vary like it does so it needs looking at. call the installer.

[ratboiler]

Charge cooler fitted to my VXR temp gauge reads 98C most of the time.

[garyk220]

Should be around ambient air temperature when driving normally (perhaps a couple of degrees higher). Accelerating hard for 5 to 10 seconds would see the intake temp rise to between 40 and 55 degrees C, depending on how efficient your CC set-up is. Peak intake temp I've seen without the CC is 87 degrees C but that was when stationary at a hillclimb event, so no airflow through the IC. On track after 6 or 7 laps the temp hovers around 50 to 65 degrees C, and drops back to ambient very quickly as soon as I coast into the paddock. Your best bet is to find someone with an OBD reader or tuner/dealer with Tech2, to check the intake temp direct from the ECU and compare this with your gauge.

[vxr36]

Thanks Yep, I think it needs sorting out. It may be a fluke but it seems to go hay wire the morning after it rains 24 hours after rain and when dry it reads just above ambient under normal conditions. Perhaps there is moisture getting in somewhere.

Edited by vxr36, 24 March 2007 - 01:49 AM.

[johnaachen]

On one of the trucks we are testing we use this temperture as an estimate of ambient air temperature. It generally reads about 10-15 degC higher than ambient under very low boost. Best way to check is probably on overrun i.e. no boost and just air coming through...this should be < 10-15 degC outside air temp. 230degC is definitely wrong....sounds like that is getting shorted to GND somewhere and giving a full scale reading. HTH garyk220

[Alex Os]

Charge cooler fitted to my VXR temp gauge reads 98C most of the time.

If that reading is anything like correct i would stop driving it straight away otherwise i think you will knacker it. Unless its out of water i would suspect your gauge is faulty.