Ok, so let me expand on my statement from lastnight that I wanted to be able to have some realtime measurements whilst driving.
Something that bugged me even before I started the chiller install was the fact that I had the blower fitted and other than VCDS and the normal in dash ambient and oil temp displays, had no clue of actual intake temps post blower, boost pressures etc. The best way to describe it is that I felt a bit like driving in the dark, I got the performance I wanted but I was lacking the monitoring bit.
That got me thinking and when I started the Chiller install I figured now was a good time to see whats available. The must haves included the following: Realtime Boost display, AIT’s post intercooler, Coolant temps both before and after the intercooler, so basically reservoir coolant temp and coolant temp after the Chiller and/or Heat exchanger before the intercooler.
Fist step was to source a product that could provide all of that and the one that gave me everything I wanted and more than I ever could have ever asked for was the vFIZ system from Qmatis in Poland. It’s a plug and play system, fully customizable and gave me the option to hook up some external sensors. All the information gets displayed on the existing DIS so no need for external gauges, pods etc. exactly what I was looking for. The system is a whole subject on its own and some of you might know it so I will just cover what is applicable to my chiller install.
For the external sensors I ordered 2 x Thermocouple Type-K’s and 1 x PT100 sensors. One Type-K for measuring AIT’s post intercooler, the 2nd one for measuring the coolant temp’s between the chiller/heat exchanger and intercooler and the PT100 for measuring the reservoir coolant temp’s. All were ordered with a 1/8 NPT thread.
Sensors (Thermocouple on the left and PT100 on the right)
The reservoir already came from JHM with a pre-tapped 1/8 NPT port which houses a small brass cocktap, I guess its to drain the water should you want to do so but I never saw the need for that. Now that hole could be put to good use as I removed the brass tap and use that to house the PT100 sensor.
Reservoir Sensor Fitted
In hindsight, the sensor in the line between the Chiller/heat Exchanger and the Intercooler I probably didn’t really needed but I made the effort to put it in place and its there so no harm done. Had a real hardtime to find a suitable sensor adaptor they were all to big so in the end had one locally made up by my machine shop which I drilled and tapped to accommodate the 2nd 1/8 threaded NPT Thermocouple sensor.
In-line Sensor Adaptor with Sensor fitted
The sensor for measuring AITs after the intercooler has a bit of a long story to it. In short it’s working but I need to relocate it. The reading is both correct and wrong ??? Lol, that does sound confusing, let me try to explain.
I decided to installed in the actual intake manifold so I drilled and tapped a 1/8 NPT thread in the manifold :’( :’( :’( and installed the sensor. Once the car was up and running the reading from the sensor just didn’t make sense. At first I thought it was either a vFiz firmware or a malfunctioning sensor problem. Further testing yielded the same results but they were off, and that still need to be confirmed . With the Chiller engaged the intake temps read way higher than the reservoir coolant temps and my expectation was that it would be close if not lower. At least its reading much lower than the OEM AIT which sits before the blower which is expected but I am convinced it should be much lower.
My explanation for the problem, which I will put to the test over the next few weeks and report back is as follows. When I looked for a suitable spot to fit the sensor I didn’t wanted anythin showing and therefor anywhere at the top or front was not an option. I opted to mount it just after the throttle body which is completely hidden.
Ok, I am no expert but in layman terms, considering that the Thermocouple junction measure liquid or air flow across the exposed tip, I might have made a simple judgement error in the placement of the sensor in relation to the throttle body. Hopefully the pic will show it clearly but I placed it way to close to the throttle body and as a result the air flow gets diverted around the exposed junction and not across it. So it basically sits in a vacuum which could explain the higher as expected readings.
As said, I don’t have any concrete proof and still need to put that theory to the test and will do so by relocating the sensor to the silicone hose before the throttle body and use the existing hole for my Boost nipple.
Intake temp Sensor
And as can be seen from the pic it was just pure luck that the placement of the sensor was placed in-line with the pivot point of the throttle valve itself as to not cause any interference. :o