We once again ran the car 8 consecutive times and were again pleased to note the car settled down quickly and began to belt out very equal power numbers after only two pulls.
We were pleased to see that the ECU’s long and short term trims were centered and exactly like stock. This means that the ECU was not excessively actively adapting for overly rich or lean conditions once it learned the new headers. This also means that we will not be getting any mysterious check engine lights down the road.
The headers power gains were from 4,300 rpm upward. This is impressive considering it is for replacing the manifold only and the headers are still breathing through a completely stock exhaust system with no tuning changes whatsoever.
One of the things that did not equate exactly to the dyno chart is that the car felt like the gains were larger than the numbers suggested. The car seemed much more responsive and lively to drive, like the boost transient time was reduced and the cars time to torque was greatly improved.