With the tune for the Turbo Concepts Stage 1 turbochargers now tapering in a manner similar to what I had with the BW K04’s it’s a good time to measure the pre-turbine exhaust back pressure.
The results for three pulls are shown below:
Compared to the BorgWarner K04’s readings:
These results put the Turbo Concepts product in the same range as the other K04-hybrids I have measured, the FrankenTurbo F21 and Turbo Engineers TTE550.
The ratio of exhaust back pressure to manifold pressure for the different turbo’s around 6500-6600 rpm is shown below:
- BW K04 – 1.56:1
- TTE550 – 1.70:1
- TC S1 – 1.85:1
- F21 – 1.80:1