머플러 교환PistonHeads★ 신뢰도 4.1 (높음)

아우디 A4 수리 사례

B9 (2015-현재) · 35 TFSI

2026. 10. 17. 작업

난이도 & 준비물

증상

Great update!Love the exhaust and the interior change. I am always a fan of adding colour!

처리 내용

Another overhaul of the charge cooler system. When we had the hot weather in the summer I wasn't happy with charge cooler performance, the longer I was booting it, the higher the temperatures went. That was with the WMI injection. It was even worse without it. The Mclaren charge cooler cores I'm running are about as good as you'll get. Looking at the data, I think my problem is the coolant flow rate. Also, if it's 30c ambient temperature, you've got no chance really, the coolant ends up around 40c before it even sees any boost. I'm on a WhatsApp group with a guy called Markos who's living in Greece. He's got a big power 986 Boxster and has the same issues. He decided to make a heat exchanger for the low pressure air conditioning pipe that runs from the evaporator back to the compressor. It's basically just a larger pipe over the AC pipe. He then runs the charge cooler coolant through this. He's got all the data on it and it looks like it performs well. He can chill his coolant under ambient temperature and it doesn't take long. I'm going to call this the Markos Pipe.This is a nice design because you don't modify the air conditioning system, it's all working as factory. No extra capacity or load on the compressor, no extra expansion valves. Just harnessing wasted cooling potential. It only works as the Porsche A/C lines run the full length of the car so there's lots of surface area to make use of, you would struggle to do similar on most cars.I went to a mates garage where I got the gas evacuated. Turns out he'd recently bought a new A/C machine, I bought this one off him for £200 as I figured it'd come in hand for this project. This is what I made Fitted with a compression fitting. To improve the flow rate I've bought 2 extra pumps. I've got a Pierburg CWA-150 at the front, the pipes split up where they go through the charge coolers, after this split there is now a CWA-100 for each charge cooler. I'd initially wanted to then run 2 return pipes back into the tank but