I hate to keep beating a dead horse about stinger exhausts, but I have another question. A couple of days ago, I got a letter from my home owners association saying I needed to power wash my driveway due to all of the "black circles". The circles that they are referring to are not oil. Surprisingly, my car drips very little. What they are referring to are the carbon circles that come from my exhaust. Quite a while back, I swapped my stinger out for a hideout muffler. I did this not because of my neighbors complaining of the noise, but rather I was tired of hearing the "popping" noise every time I let off the gas. I called around to several places and always got the same story, "A stinger has no back pressure. The popping comes from negative back pressure causing air to flow backwards through your engine. That causes detonation of any unburned fuel in your exhaust stroke." That sounded like a logical explanation to me. So I bought a hide out muffler and that opened a new problem. The exhaust blows straight down and creates black circles everywhere. And, my car still "pops", only it is much quieter. I would love to put my stinger back on, but that popping gets on my nerves. I have been looking at dual quiet packs since they blow straight backwards. However, if that is what I need to fix the problem, so be it. But it just seems to me something is not right somewhere. I have dropped it off several times at the shop and had my carbs adjusted and timing checked. I don't want to keep spending money doing that. Would an exhaust leak cause the "popping" problem? Other than that, everything is running great.
72 Super Beetle