Took my broken 034 Motorsport exhaust mid-pipe to a shop to have them weld the reducer back onto the catalytic converter.

While fixing that weld they noted that two other welds were cracking, making three out of four welds on the cats bad.  They re-welded all of them.

I’m disappointed with the quality of the work put into this exhaust, in light of how expensive this product is I’m further disappointed.

I was out the other day doing a pull when bang…  braaa (very loud exhaust).  “What the heck was that?”  My first thought was a v-band clamp holding the mid-pipe to the downpipe let go and the exhaust separated.  I brought the car back to the garage and took a look underneath:

Oh, that’s not good.  Something on my 034 Motorsport exhaust system failed.  I detached the mid-pipes for a better look:

A clean break right where the reducer attaches to the catalytic converter.  Great, car is down and now I need to find a shop to weld it back together.

Here’s a chart showing pressure recorded right before the intercooler inlet versus the pressure recorded at the MAP sensor when using BW K04 turbochargers and the SRM Intercoolers.

Under normal driving conditions the pre-intercooler sensor reads between 0.05 and 0.1 psi, which leads me to believe there is not much difference between the boost readings attributable to sensor accuracy.

The longer of the two pulls shown is out to approximately 6600 rpm.

Below is the longer pull with MAF vs Pressure:

The difference below 200 g/s is probably due to the readings being taken by different data logging equipment.  It is more difficult to match up data points when there isn’t a common reference data as used in the first chart  where pressure from each sensor was plotted versus time.

Boost and MAF on the same chart against Time: