997.1 s with PSE - cat and manifold upgrade advice
Hello all,
Im a recent purchaser of a 2007 997.1s with PSE.
I bought from Cridfords in Surrey, 61,000 miles 5 owners in Feb last year and prepared for sale by them....
At 63,000 I experienced a low speed ( 8-10mph) rear shunt into a stationary Range Rover that needed a rear drivers side chassis leg replacing with a new front and rear end ( engine out ).
Insurance paid for repairs.
Had the car back looking and seemingly running like new.
Unfortunately after 400 decent miles an engine warning light came on, loss of power and white smoke from passengers side and misfires in 4,5 & 6. Engine off and recovery truck. Diagnosis by a trusted local classic mechanic was an AOS fail and CAT Blockage and now suspected cam chain jump ?
Short story is the car is with Hartech for a re build right now after they say loss of compression in 1 side and timing issue.....
I love it and will likely do the whole Hartech upgrade when diagnosed but also I want to add something a bit more and personally only want slight improvement in throttle response and a more "motorsport" exhaust note when PSE on and above 4,000 rpm. I see that as 200 cel cats and manifold ( whilst the engines out) and a new clutch ( Mines a manual) and then re map.
Top gear straight 200 cel cats and their manifold with Hartechs recommended mapping expert is what Im thinking but would really appreciate any advice from other members.
I really dont want any drone ( with PSE off) dont mind it when on.
Which CAT option is best, Straight or X pipe ( is that cross overs?). Is pipe diameter an option if Im using the stock PSE boxes ?
Given my experience I want to get this right and You tube videos cant represent the flat out, induction and exhaust combo that make these machines the best on earth !