2010年4月14日 · The N75 valve controls the turbo wastegate actuator via directing air pressure to it by actuating a tiny solenoid when the ECU decides its neccesary. this solenoid can turn on and off VERY fast to keep the boost at the proper constant. basically it prevents overboost electronically instead of relying on a set tension spring on your wastegate.

2009年1月2日 · This ECU controls boost pressure by either holding or dumping boost via a waste gate frequency valve (WGFV), the "N75", aka "pulsed charge pressure control (CPC) valve". The N75 is located near the front of the engine, near the MAF to turbo hose, as shown here:

2007年5月19日 · 1.8t N75 valve (version C): The N75 valve controls the wastegate of your turbo. This is a direct replacement for your OEM stock 1.8t N75 valve. This valve is from a 1.8T AWD motor and is the smoothest boost delivery of all the valves. 1.8t N75 valve (version J): This is the N75 valve from an Audi TT 225.

The basics of the N75 Waste Gate Frequency Control valve: how it works alongside the waste gate actuator, the waste gate itself and the turbo. You’ll be able to see how it should function in an...

2011年5月6日 · The N75 is the VW/Audi part identification number for the wastegate by-pass regulator valve. This valve is responsible for controlling the movement of the pneumatic actuator which drives the wastegate.

2005年4月11日 · <font color="red">The N75 is the valve that plays a large part in regulating the wastegate. An unenergized solenoid (0% duty cycle) permits full charge pressure on actuator diaphragm. So the turbocharger naturally regulates itself. As boost builds, the wastegate opens.

Wastegate Frequency Valve (N75) Arguably the least understood component on Audi's turbo engines... This innocuous looking fellow is also one of the most important devices in the engine bay as it is largely responsible for boost pressure regulation.

2010年7月6日 · Use a short section of vacumm hose (8") and connect between the "Vac" port on the N-75 and the vacumm nipple on the main checkvalve. This will eliminate every thing else in the vacumm system. If you get boost your N-75 is operational. If you want to verifi your N-75 you can remove your N-18 (EGR solenoid) and connect it to your turbo.

2016年6月22日 · It seems that our N75 valves have gone NLA. I know that they can be ordered through Audi Tradition, but we'll skip that only as a last resort option. I once had a N75 valve from 1.8T (AEB), which looked identical to the one I have in my AAN, only it was black not brown. Is it possible to fit it to a I5? Acceptable price too - around 40 euros.

2002年11月28日 · To achieve the intended results, N75 is factory calibrated by a screw above the plunger that sets the proper spring pressure of a spring between the plunger and the blue cap. It's easy to see that one might get a little more boost by turning the calibration screw up a bit, thus increasing the bleed-off rate and reducing the pressure to the ...