Audi B5 S4 Video Contest Survey

Over the years a few videos featuring the B5 S4 have been produced by owners.  I thought now may be a good time to hold a contest where B5 S4 videos are featured and a ‘best’ video is voted upon by other enthusiasts.  A cash prize could be awarded to the top vote getter(s).

The purpose of this poll is to find if there is enough interest in holding such a contest.

Subaru Airbox MAF Flow testing

A Subaru owner contacted me about putting their airbox on the flowbench to determine how closely the Subaru table for MAF voltages matched with real airflow.

Subaru Airbox on Flowbench
Subaru Airbox on Flowbench

I ran this experiment with the S4 MAF Sensor and did not get a very good match so I was interested to see how things would turn out with the Subaru setup.

Subaru MAF Voltage Table
Subaru MAF Voltage Table

Because the voltage from the MAF sensor is not read by the hardware for measuring the flow bench airflow and pressure drop I needed to hook up a multimeter to the MAF sensor 5V output wire and take manual readings at various airflows.  Although this method is not a precise as it would be if all sensor values were read by the same datalogger, the results were good.

Flow Test Results vs Subaru Table
Flow Test Results vs Subaru Table

Agreement between the Subaru MAF table values and the measurements taken on the flow bench were good.

TiAL 605’s Return

With an eye toward checking out some of the larger turbocharger options, and to see how they stack up against the RS4 K04 based turbo’s I have already tried, I’ve picked up a set of the TiAL 605 version 1 turbochargers along with the various install hoses and fittings.

TiAL 605 v1 Turbochargers
TiAL 605 v1 Turbochargers

They’ll be in line behind the BorgWarner RS6 turbo’s that I have on the shelf, and a set of the current FrankenTurbo F21 design K04 hybrid that is being assembled at FrankenTurbo, so it may be some time before I get these TiAL 605’s installed.

Audi B5 S4 Information and Testing