Originally Posted by petevette

Hi guys, I know there has been a lot of talk about what pipes to use with what engines, I didn't pay too much attention at the time because my 7 port turbo was running real good with a .053. As of last week it seemed to start changing on me. Wasn't running very good at all. I checked the usual things like fuel line, glow plugs, clutch etc. Everything checked out. Decided to try just for kicks to change the pipe to a JP-1 and seems to run really well with it. Won't know for sure until I get it on the track, but ran well up and down the street with just a slight difference in tunning from my .053. I still have the head shim installed. The engine is fully broken in now. What effect will keeping the shim in versus taking the shim out have on the engine?

Does anyone else have an opinion on using a JP-1 pipe on the 7 port T? For that matter, what about the other JP pipes?