i have a few extra heat exchangers at my work that I may be able to get for free from my bosses. See photo. The first one stainless tubing with copper fins, the second is copper tubing with aluminum fins.they have roughly the same amount of tubing going through the fins area. I think the stainless one has more surface area, but stainless is a very poor heat conductor... I can probably get two of each as well if it would be worth running two heat exchangers.
Also I live in Colorado, so it doesn't get crazy hot here. I was considering painting either of these black as well to prevent any oxidation on the copper. Car is manual, 335xi, installing GC lites soon.
Also I live in Colorado, so it doesn't get crazy hot here. I was considering painting either of these black as well to prevent any oxidation on the copper. Car is manual, 335xi, installing GC lites soon.