This afternoon I swapped the driver’s side turbocharger. A TTE550 was removed and a BorgWarner RS4 K04 was installed. This was an uneventful swap with no problem bolts to deal with.
Today I swapped out the passenger side turbocharger, BorgWarner K04 going in place of a TTE550. Next I'll need to swap out fuel injectors back to the 72# EV14's that the K04 tuning was done with.
With the TTE550 turbochargers installed on my S4 I can start to measure the performance of this product and compare the results to those obtained with some of the other turbochargers that I have used. The performance claim that leads off the description for the TTE550 is: Because keeping K04-like…
This dyno shows the TTE550 turbo's on a B5 RS4 versus baseline data on the same RS4 with the RS4 K04 turbo's. I find these results very encouraging as I look for a turbo that is similar to K04's in low end torque and able to take full advantage of…