ok, so my car was running fine and i put it away for awhile cuase i was waiting on a new radiator. Today i decided to patch my old one cuase they are on back order, and put on my new 3 thermal exahust.
When i take it out for a test drive, the moment i hit boost there are some very bad sounds coming from my exahust. It sounds like its starts to spool and just hits a spool limiter or somthing. It kinda sounds like a bunch of barrings (sp?) spinning very sloppy. I really have not clue maybe compressor surge????

My setup:
t3/t4 .48/.57
hondata (basemap)
shitty dumptube
440 rc
255 fuel pump
35mm tial
xs boost controller.
5 psi
all on my b18