What’s up with the poll?

You may have noticed in the lower right corner of your screen a small box that says “Poll”.  I am in the process of deliberating over what turbocharger pair to install next on my S4.  I have put some of my thoughts in these pages, but I was interested in learning what visitors to this site would seek in an aftermarket turbocharger if faced with some of the limitations I am.


I’m moving the poll to this post so that I can expand the use of the polling feature.


The final numbers for the poll are shown below:
Chart showing Power vs Spool Poll Results
Power vs Spool Poll Results

TorqTune Setup

This is the initial results of wiring up the TorqByte WMI controller in my S4 and then running the Aquamist Flow Sensor off the WMI controller.

Chart showing TorqTune initial setup results
TorqTune Initial Settings Output

There will be a full write up on the TorqByte CM5-LT water-methanol injection controller coming soon, but for the time being I am working on getting it wired up and verifying that the wiring and configuration of the TorqTune software is correct.

What is illustrated in the chart above is the WMI pump duty cycle, as specified in the TorqTune settings, the pumps output current, and the resulting water-methanol fluid flow rate.  This is using the TorqTune software to trigger the injection while the engine is idling with no boost.

As can be seen, a moment after the current increases the water-methanol flow rate also increases, what I was expecting to see with a properly setup system.

Weighing In and Straightening Out

One of the important elements to calculating accurate information from a FATS pull is to know the vehicle weight.  For my baseline weight I fill the gas tank and ensure the typical items I carry around in the car are onboard.  My S4 weighed in at 3600 lbs.

Audi B5 S4 Vehicle Weight Sheet
Audi B5 S4 Vehicle Weight Sheet

Another thing I took care of today was having an alignment performed.  Since having the Stern adjustable upper control arms returned from being rebuilt I have not had the car properly aligned.

Audi B5 S4 Alignment Spec Sheet
Alignment Spec Sheet

And lastly, a photo of the current state of wiring partially occupying the passenger footwell area.

Audi B5 S4 sensor wire bundle