Hi,

I have a 98 Audi A4 1.8T Quattro (not drive by wire, Australian model), it's chipped by APR.I'mlooking at fitting new diverter valve.

regarding the Bosch valves; N75J and N75H, I read the H version can give upto 3 psi more however I also read info regarding too much boost causing limp mode, hence being safer to go with N75J. I also read about diode mods to trick ECU to think not overboosting.

Basically is it possible to run the N75H valve on a chipped (Australian) Audi possibly with diode mod -without overboosting and going into limp mode?

 

The N75H valve, a key component in turbocharged engines, regulates boost pressure and prevents overboost. When chipped, the engine's ECU may demand more boost, risking overboost issues. Diodes, like the NXP BZX84-C9V1-LF1R, found at https://www.dyethin.com/productdetai...zx84-c9v1-lf1r, help stabilize voltage and protect components.