All posts by Jeff

K03’s with Stock Intercooler Results

I’m resuming the process of developing a modest Stage 2 tune and at the same time recording other data.  I remain impressed by how well the stock intercoolers work with the K03’s.

Below is a chart showing a series of three WOT pulls with boost climbing to 17 psi and then tapering down to between 10-11 psi.  The orange and blue lines are the temperature of the air exiting the compressor, pre-intercooler, and just past the throttle body, post-intercooler.  The stock IC’s do a good job holding these temperatures in check, even over a series of three pulls.

Audi B5 S4 stock intercooler performance
Stock Intercoolers & BW K03’s

 

Compressor Signal Line Monitoring

Today I attached an adapter inline of the compressor signal lines that feed into the N75 valve.  The adapter has a fitting for a line that will allow me to record on the Innovate LMA-3 AuxBox the boost pressure in the compressor housings.

compressor_housing_boostThis will give me an idea of the compressor outlet pressure, rather than just manifold pressure, which is lowered by the pressure losses between the turbo outlet and throttle body, primarily by the intercoolers.

Innovate LMA-3 Aux Box
Innovate LMA-3 Aux Box Datalogger