Feedback from my ScanGauge II

I have the above device installed in my 2006 Boxster S . For basic information on it, please visit ScanGaugeII - Trip Computers + Digital Gauges + Scan Tool . Briefly, it provides real-time data on engine parameters such as throttle position, water temperature, timing advance, and the like—it has other functions too, but I am not concerned with them for the purpose of this thread. The ScanGauge II was installed before I removed the so-called Impact Absorber Plate (IAP), also know as the restrictor plate, among other names. Facelvega researched the intake on the 987 rather thoroughly and found that IAP is the correct name according to Porsche. Anyway, the ScanGauge II has the ability to read the intake air temperature in real time. Using this feature, I measured the said temperature both before and after I removed the IAP. In brief, the measured intake air temperature was essentially the same regardless of whether or not the IAP was removed. Specifically, in the morning, just before approaching campus, I have about a four mile stretch of road that I drive (without stopping) at about 40 mph in fourth gear. The intake air temperature was generally 14 or 15 degrees F higher than the ambient temperature both before and after the IAP was removed, regardless of whether the ambient temperature was 72F or 82F. Driving the same stretch of road home (after the car had been sitting in a covered garage all day), the same observations held, but in this case the intake air temperature was generally 16 to 20 degrees F above ambient, the latter being in the mid to uppers 80's this time of the day. My intuition had suggested to me that with the IAP removed, access to "outside" air was better, and therefore I might observe lower intake air temperatures. This was not the case, however. Given that I was driving rather sedately, this may explain why I did not observe any differences pre-and post-IAP removal. Maybe if I was to push the car hard, then I might observe some differences in the intake air temperatures pre- and post-IAP removal, but I am not going to put the IAP back on to test this conjecture—sorry. This type of analysis would not even remotely pass peer review, but at least it presents some reasonable data that might have some informational content.

Thanks for the info. Any idea what the sampling rate might be for the temp? In other words how often is the ECU actually checking the intake temperature?

Can it reset the service reminder light?

No, according to their documentation it can turn off CEL's and clear error codes but it can't clear the service reminder directly. But, also from reading their documentation, I learned that you can send commands to the car (up to 8 of them) via the ODBII port. I suppose it would be possible to figure out the code to send to reset the service reminder and set it up as one of the custom commands.

You are welcome. The so-called operating mode is KWPS according to ScanGauge II, and I have the update rate set to FAST. With the FAST rate, all readouts except coolant and intake air temperatures are updated every second, whereas the aforesaid two temperatures are updated half as fast, i.e., every two seconds. I would also like to add a comment about the water temperature gauge on the Boxster . When the Boxster gauge hits approximately 150 F, the ScanGauge II indicates 145 F, whereas when the Boxster reads 175 F, the ScanGuage II indicates only 155 F, some 20 F lower. I have found that it takes another four to five minutes before the ScanGauge II indicates a water temperature of 175 F, and that is with the warm to hot weather we have here in Florida. Based on this, I strongly recommend that owners wait at least five minutes after the car's water temperature gauge reads 175 F before "hammering" the car.

If you can fit a pressure gauge to the coolant system it is better to gauge the warm up cycle with an increase in pressure than water temp.

Accuracy of water temp on ScanGauge II I have noticed that the ScanGauge II seems to read the water temperate high. Today at the track, the car gauge reported 200F, while the SGII reported 225F. While running in traffic on my commute ( not in traffic jams) the car reports 175F while the SGII reports 200F. Does anyone else have experience with the SGII to confirm that it might not be calibrated for the 06 Cayman S? Thanks

Re: Accuracy of water temp on ScanGauge II You observations are generally consistent with how the ScanGauge II and the OEM gauge read on my 2006 Boxster S. This is also the case for the two other cars in which I have used the ScanGauge II Typically, when fully warm and driving modestly to campus in the 35–45 MPH range, the OEM gauge reads approximately 175 F and the ScanGauge II reads 186 F. This is consistent regardless of the weather. After spirited runs in hot and humid weather I have seen the ScanGauge II read as high as 215 F after I have come to a rest and idled for a bit, while the OEM gauge continued to read 175 F. My understanding is that the ScanGauge II does not need to be calibrated for any car, as all it does is "read" the data from the cars ECU via the OBDII port. I trust it more than the OEM water temperature gauge.