To all 997 Turbo owners with sports exhaust

[Peter997T]

I recently had my 997 Turbo upgraded with a sports exhaust and 200 cell CATs. The sound is now much richer, BUT I now hear a loud hiss when the boost comes on.
Is this normal? It's most noticeable when in 4th or 5th gear cruising along and then you accelerate.
I am worried that there may be an induction leak? The car seems to accelerate OK, sometimes there may be a very slight hesitation under gentle acceleration, not hard acceleration. I did not get the engine re-mapped, it's fast enough already!
What do you think?

Edited by Peter997T on Monday 19th December 11:54

[chriscoates81]

Whats the boost pressure?

[IMI A]

The hissing sound is more than likely a boost leak. Its not normal. Any decent Indy can fix.

[Peter997T]

It does create boost on the gauge, but hard to read and exact figure when you are whizzing towards the horizon.
What should it be?

[Peter997T]

All fixed, took the car to Addspeed in Horsham. They found a loose hose onto the LH intercooler. No more hissing and max performance again!

Peter

[Steve Devaney]

And which exhaust system did you go for?

[Peter997T]

It was a Kline like system. Anyway, after telling DMS that it was a problem with a loose hose, they would not give me a goodwill payment towards the fix. It wasn't expensive. They gave me a voucher against future work. Not likely to go back there so that is of no use. A poor experience all around with DMS Automotive.