FT21v3 + Mamba Preload Check

After getting my wideband O2 sensor installed I disconnected the electrical signal to the N75 so that I could check the boost pressure that the Mamba wastegates allow with just the preload.

FT21v3 + Mamba WG Disconnected N75 Preload Check
FT21v3 + Mamba WG Disconnected N75 Preload Check

I am glad to see a mostly consistent level of boost being held, but I had set the preload to 12 psi prior to installing the engine in the car so I was expecting to see closer to 12.  I’ll next be double checking that the preload is equal between the two Mamba wastegates.

Mamba Billet Wastegates for the Audi B5 S4
Mamba Billet Wastegates for the Audi B5 S4