Hi all, hopefull someone will have some ideas on this issue.
Normally on my fully decated (Envy 3" deacts with 1.2bar restrictor ring) BPU TT (Jspec) I get just about 1 bar boost. Ive temporarily fitted my my second cat whilst I get an AFR bung welded to my second decat, with the second cat back in place I am getting easily 1.1/ 1.2 bar.
The only thing I can asume is that the restrctor ring is more restrictive than the second cat (is this even possible ?), the diameter of the restrictor ring is 50.8mm which seems to be similar to what everyone else is using.
If anyone has any ideas as to whats going on that would be great!
Shaun