Boost problem "take 3"!!!

[Trevrx]

My boost pattern was similar to yours, trailing off on secondry turbo when used to be ok.
Turned out to be a clogging cat.  Did they put the old cat back on when you bought the car, or a new one?  Maybe they fitted a de-cat pipe because the cat was failing?
I fitted a mid-pipe and boost controller to solve mine and run at 11psi.  Recommended for big power increase!  That cat weighs a ton too!

[feelio]

Did they put the old cat back on when you bought the car, or a new one?.......That cat weighs a ton too!

No, they ddn\'t put a new one on. Is there any tests or tell tail signs that the cat might be failing?
Oh I know its heavy, I wasn\'t paying enough attention when taking it off and dropped it on my face!!!!! :reallymad    (Dumb ass!!)

[chrispy]

it sounds right, mine is a pretty much stock type R with filters and exhaust, still have cat, it was running 10psi primary then 8psi secondary aparantley as it should be according to the lads at re-worx, made 235bhp at the wheels.

[andyrose]

hey dude (long time no speak)
i\'ve got a Hi-flow sports cat (HKS i think) sitting in my shed if you wanna try it for a while.
AndyR

[feelio]

Hey!!
I know, I\'ve been in Spain recently, only just got back.....but I took your advice and saw Gary in Ipswich before I went. He couldn\'t figure it out either!

Hey, if you wouldn\'t mind, that would be great. I think I still have your number......I\'ll give you a bell after work.

[Trevrx]

Feelio, tell-tale signs are rattles and noises from the cat area where the ceramic is breaking up inside,  and a more than normal trailing off of boost where zorst flow is being resticted by the clog.
Chrispy, I think stock boost is 10 - 8 - 10 psi , then trailing down to about 9 or 8 psi after 6k rpm or so.